Спутник ФКИ. Soil Moisture Active and Passive. [Редактировать]

U.S. Agriculture Department’s Foreign Agricultural Service выпускает частые прогнозы о здоровье зерновых культур во всем мире, чтобы помочь отдельным фермерам, компаниям и правительственным учреждениям спрогнозировать спрос и предложения. Точную информацию о состоянии посевов получить при помощи наземных измерений бывает сложно. С целью устранения данного недостатка 29 января 2015 года планируется запустить космический аппарат SMAP. Его целью будет являться сбор информации о влажности почвы. По габаритам аппарат сопоставим с размером маленького школьного автобуса. Оборудован складывающимся коническим отражателем, радиометром L-группы и радаром с синтетической апертурой. Радар и радиометр спутника будут работать синхронизированно, чтобы предоставить информацию о влажности почвы, которая будет более точной, чем что-либо в настоящее время доступное. После запуска ученые НАСА планируют провести летно-конструкторские испытания системы (в течении 90 дней).

Инструменты

Радар
  • Частота: 1.26 ГГц
  • Поляризация: VV, HH, HV 
  • Относительная точность (3 км сетка): 1 dB (HH и VV), 1.5 dB (HV)
  • Получаемые данные:
    • Высокодетальная съемка (SAR) 
    • Поддержка глобальной съемки с низким разрешением
Радиометер
  • Частота: 1.41 ГГц
  • Поляризация: H и V
  • Относительная точность (40 км сетка): 1.3 K
Антена (производитель антены Northrop Grumman, мотора для вращения Boeing)
  • Конически сканирующее устройства разделенное между радаром и радиометром
  • Диаметер: 6 метров
  • Скорость вращения: 14.6 оборотов в минуту
  • Эффективность: ~90%
  • Разрешение:
    • Радиометер (IFOV): 39 км x 47 км
    • SAR: 1-3 км (на протяжении 70% от полосы захвата)
  • Ширина полосы захвата: 1000 км        

 

Дополнительные наименования

#НаименованияПоиск в новостяхПоиск в документах
1SMAPНайтиНайти

Дополнительная классификация

#Наименования
1Тип орбиты - НОО
2Тип оператора(владельца) - государственный
3Страна оператор(владелец) - США
4Страна производитель - США

Новостная лента[Найти информацию в новостях] [Найти информацию в документах]

#Новостная лента.
12015-05-20. Космический аппарат начал сбор научных данных.
Космический аппарат Soil Moisture Active Passive (SMAP) начал выполнять задачи по сбору радиометрической и радарной информации об окружающей среде Земли. Основным целевым предназначением собираемых данных является улучшение возможностей климатологов по предсказанию погодных явлений и изменения площади поверхности ледовых покровов.Тэги: Soil Moisture Active and Passive
22015-08-12. На космическом аппарате произошел сбой.
Один из двух главных инструментов космического корабля остается неактивным уже больше целого месяца. В настоящее время специалисты НАСА не смогли определить причину резкого выключения прибора, но и не знают когда им удастся его включить.
В качестве основной причины отказа в НАСА называют проблемы с низковольтным источником питания усилителя радара. Данный прибор служит для того, чтобы передавать на радар больше мощности, за счет чего он становится способным оценивать влажность почвы. Тэги: Soil Moisture Active and Passive
32015-09-26. НАСА пытается реанимировать аппарат.
После того как в июле у космического аппарата отказал радар, ученые из НАСА решили, что им необходимо скоординировать съемку с космического аппарата SMAP и других радарных спутников. При этом НАСА признало что высокодетальный радар космического аппарата скорее всего будет признан утерянным, однако, по мнению агенства остальные научные приборы на аппарате работают штатно, а следовательно его еще можно некоторое время эксплуатировать. В целом же в агентстве отмечают, что полноценной замене аппарату у них нет, но они попытаются скомпенсировать недостаток данных путем компьютерного совмещения информации с пассивного радара SMAP и данных других аппаратов.Тэги: Soil Moisture Active and Passive
42015-11-28. НАСА пытается найти замену радару космического аппарата SMAP.
Ученые из НАСА приступили к анализу возможности замены информации которую они планировали получать со своего космического аппарата SMAP при помощи данных орбитальной группировки Copernicus. При этом, из всего перечня космических аппаратов группировки исследователей наиболее заинтересовали возможности радара космического аппарата Sentinel 1A. При этом, с точки зрения НАСА данный космический аппарат наиболее пригоден для замены вышедшего из строя радара космического аппарата SMAP поскольку его орбита и возможности наиболее близки к желаемой. Вместе с тем, пока что НАСА так и не обнародовала данные о причинах выхода из строя своего аппарата. Тэги: Серия CopernicusSoil Moisture Active and PassiveSentinel 1A
52016-08-17. Продолжаются работы над радиолокационным спутников.
Компания Astro Aerospace, которая принадлежит Northrop Grumman Corporation, закончила предварительную экспертизу рефлектора радара, который будет установлен на космический аппарат NISAR. Данный проект финансируется за счет средств НАСА и ISRO, в рамках которого агентства создают L/S-диапазонный радиолокационный спутник с синтезированной апертурой. Сроком запуска нового космического аппарата объявлен 2021 год. Целевой задачей миссии будет являться сбор информации об окружающей среде, включая и состояние ледяного покрова Земли. Диаметр L-диапазонного рефлектора составит 12 метров.
Компания Astro Aerospace достаточно широко известна своей деятельностью в области создания рефлекторов, в частности ранее она уже создала шести метровый вращающийся рефлектор для космического аппарат SMAP. Тэги: NISARNorthrup GrummanSoil Moisture Active and Passive

Технические характеристики

#ХарактеристикаЗначение
1Масса (инструментов), кг356
2Масса (платформа), кг686
3Масса (топливо), кг80
4Мощность (инструментов), Вт448
5Мощность (платформа), Вт903

Характеристики орбиты

#ХарактеристикаЗначение
1САС (планируемый )

Пусковые характеристики

#ХарактеристикаЗначение
1Ракетаноситель 1xДельта 2
2Дата (пуска)март 2015

Экономические характеристики

#ХарактеристикаДата измеренияЗначение
1Заказчик Космическое агентство США
2Прогнозируемая стоимость (проекта), млн. долл.2011-01-01780 - 900
3Прогнозируемая стоимость (формулировки проекта), млн. долл.2012-01-01388.2
4Прогнозируемая стоимость (разработки), млн. долл.2012-01-01485.7
5Прогнозируемая стоимость (работы с аппаратом), млн. долл.2012-01-0142.6
6Прогнозируемая стоимость (проекта), млн. долл.2012-01-01916.5
7Прогнозируемая стоимость (проекта), млн. долл.2012-01-01872 - 926
8Прогнозируемая стоимость (проекта), млн. долл.2013-02-01916.5
9Прогнозируемая стоимость (формулировки проекта), млн. долл.2013-02-01388.2
10Прогнозируемая стоимость (разработки), млн. долл.2013-02-01485.7
11Прогнозируемая стоимость (работы с аппаратом), млн. долл.2013-02-0142.6
12Прогнозируемая стоимость (формулировки проекта), млн. долл.2014-04-01388.2
13Прогнозируемая стоимость (разработки), млн. долл.2014-04-01490.0
14Прогнозируемая стоимость (работы с аппаратом), млн. долл.2014-04-0138.4
15Прогнозируемая стоимость (проекта), млн. долл.2014-04-01914.6
16Прогнозируемая стоимость (проекта), млн. долл.2015-03-24914.6
17Прогнозируемая стоимость (формулировки проекта), млн. долл.2015-03-24388.2
18Прогнозируемая стоимость (разработки), млн. долл.2015-03-24479.0
19Прогнозируемая стоимость (работы с аппаратом), млн. долл.2015-03-2447.4

Информация об удачном запуске

#ХарактеристикаЗначение
1Космодром База Ванденберг
2Дата пуска2015-01-31
3Полезная нагрузка 1xSoil Moisture Active and Passive
4Полезная нагрузка 1xFIREBIRD C
5Полезная нагрузка 1xFIREBIRD D
6Полезная нагрузка 1xGRIFEX
7Полезная нагрузка 1xExoCube
8Ракета-носитель 1xДельта 2 7320

Найдено 1000 документов по запросу «Soil Moisture Active and Passive». [Перейти к поиску]


Дата загрузки: 2017-06-15
Скачать документ
Скачать текст
0.07/5
... Salama Soil moisture retrieval from combined Active/Passive Microwave Observations over the Regge and Dinkel... combining active and passive microwave observations is a promising technique to retrieve accurate soil moisture at higher resolution. The proposed algorithm for the future NASA’s Soil Moisture Active/Passive (SMAP) mission is the recent change detection approach providing absolute soil moisture... retrieving soil moisture and apply it to the passive (VUA-NASA AMSR-E) soil moisture products and corresponding active... on the temporal and spatial variability of soil moisture. Keywords: soil moisture, combined Active/Passive microwave, SMAP... Great Plains SMAP……………………………………………………………………Soil Moisture Active and Passive SMEX02…………………………………………………………………..Soil Moisture Experiment 2002 SMOS……………………………………………………………………Soil Moisture and Ocean Salinity VI... Figure ‎6.3- Series of soil moisture maps achieved by combining passive and active microwave observations over... Figure ‎6.4- Series of soil moisture maps achieved by combining passive and active microwave observations over... corrected retrievals and LPRM products ........ 19 vi SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE... System Simulation Experiment (OSSE) for Soil Moisture Active/Passive (SMAP) mission which provided a better... passive microwave observations. 1 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND.... research the combined active/passive approach of the future Soil Moisture Active and Passive (SMAP) mission. We....pdf SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL... hydro-meteorological and agricultural applications. Evaluation of the combined active/passive microwave soil moisture retrieval in anticipated of the launch of NASA’s Soil Moisture Active/Passive... 2008. 3 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL... active/passive microwave observations. 4 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND... equation. 3 4 5 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL... minutes. 6 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL....html 7 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL.../a/alos SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL...’s co9 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL... SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL volumetric soil moisture retrieved from passive... (ITCSM08) and c) forested area (ITCSM20). 12 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL 5.1.2. Response to Soil Moisture and NDVI... COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL 6. RESULTS (0,0) (1,0) (2,0) (0,1) (1,1) (2,1) LPRM Soil Moisture (m3... 18 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL soil moisture... 19 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL 6.3. Soil Moisture... Volumetric soil moisture (m3 m-3) Figure ‎6.3- Series of soil moisture maps achieved by combining passive and active microwave... Volumetric soil moisture (m3 m-3) Figure ‎6.4- Series of soil moisture maps achieved by combining passive and active microwave... SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL 7. CONCLUSIONS AND...). The Soil Moisture Active/Passive Mission (SMAP). Paper presented at the Geoscience and Remote Sensing..., K. H., Crow, W. T., Edelstein, W. N., . . . Johnson, J. (2010). The soil moisture active passive (SMAP) mission. Proceedings of the..., R. A. M., Kerr, Y. H., . . . Wagner, W. (2010). Soil moisture active and passive microwave products: intercomparison and evaluation over a Sahelian site...-2 25 SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL... of soil moisture using a passive and active low-frequency microwave airborne sensor during SGP99. Geoscience and..., T. J. (1996). Use of active and passive microwave remote sensing for soil moisture estimation through corn... Sensing Active and Passive (Vol. II). Canada: Addison-Wesley Publishing Company. 26 SOIL MOISTURE RETRIEVAL... Descending SOIL MOISTURE RETRIEVAL FROM COMBINED ACTIVE/PASSIVE MICROWAVE OBSERVATIONS OVER THE REGGE AND DINKEL...



Дата загрузки: 2017-06-15
Скачать документ
Скачать текст
0.05/5
... similarities and discrepancies. 2.2. Soil Moisture Soil moisture is a fundamental component of the water cycle and plays... the Standardized Soil Moisture Index (SSI) [Hao and AghaKouchak, 2013] and the soil moisture percentile [She... estimates. Most satellite soil moisture algorithms are based on passive MW [Njoku et... MW-based soil moisture retrieval relies on the relationship between soil permittivity and liquid... temperature and active MW backscattering to volumetric water content of soil. MW soil moisture observations...; Wang and Qu, 2009]. For root-zone soil surface moisture estimates, MW soil moisture observations... optical, thermal, passive MW, and active MW soil moisture monitoring approaches, see Wang and Qu [2009... surface and root-zone soil moisture with a two-layer modified Palmer soil moisture model... (e.g., compare Australia and Russia in Figures 1 and 2). The CCI soil moisture data are yet... Soil Moisture (SSI) based on CCI satellite soil moisture observations-July 2010. 2.3. Groundwater and Terrestrial... of surface water, groundwater, soil moisture, snow/ice, and moisture stored in vegetation [Rodell... − ΔSM − ΔSWE, where SM and SWE represent soil moisture and snow water equivalent, respectively... characterizing streamflow and soil moisture anomalies [Choi et al., 2013] and provides valuable... occurrence and change in surface water and soil moisture availability that varies in space and... and precipitation and soil moisture [Di et al., 1994; Farrar et al., 1994; Adegoke and... drought information based on precipitation and soil moisture (Figures 1 and 2). One limitation of TCI... bands respond to soil moisture and leaf water content differently and, thus, combining... Tropical Rainfall Measuring Mission (TRMM) and soil moisture and land surface temperature data from...-index drought assessment using precipitation and soil moisture and has been used in a number... on global precipitation and soil moisture data). This model is standardized, and thus provides... Research and Applications (MERRA-Land [Reichle et al., 2011]) precipitation and soil moisture data... for future monitoring and anomaly detection. 5.2. Combined Soil Moisture and Vegetation Water Content Land surface parameters such as soil moisture and temperature...) and provides valuable drought-relevant information (e.g., land cover, vegetation structure, temperature, soil moisture, and snow cover) [Tedesco and Kim, 2006]. Currently, the... indicator of available combined soil moisture and vegetation water content and hence as a proxy... [Norouzi et al., 2012]. The Soil Moisture Active Passive (SMAP) mission launched in January... N Series; SMOS: Soil Moisture and Ocean Salinity satellite; ICESat-2: Ice, Clouds, and Land Elevation... Water and Ocean Topography; SMAP: Soil Moisture Active Passive; ALOS 2: Advanced Land Observing Satellite; and NPOESS... of retrieved information (e.g., estimated soil moisture versus soil moisture anomaly), and data formats, is one... assessing combined soil moisture and vegetation water content, and vertical profiles of moisture in.../pnas.0901438106. Adegoke, J. O., and A. M. Carleton (2002), Relations between soil moisture and satellite vegetation indices... evapotranspiration and soil moisture from satellite imagery, Sensors, 7(8), 1612–1629. Cashion, J., V. Lakshmi, D. Bosch, and..., P., K. Caylor, G. S. Okin, and T. M. Scanlon (2007), On soil moisture-vegetation feedbacks and their possible effects... Jeu, and V. Naeimi (2010), Error characterisation of global active and passive microwave soil moisture datasets, Hydrol.... Entekhabi, D., et al. (2010a), The soil moisture active passive (SMAP) mission, Proc. IEEE, 98..., D., R. H. Reichle, R. D. Koster, and W. T. Crow (2010b), Performance metrics for soil moisture retrievals and application requirements...fluence of soil type on the relationships between NDVI, rainfall, and soil moisture in semiarid Botswana. II. NDVI response to soil moisture, Remote Sens..., C., et al. (2010), Soil moisture active and passive microwave products: Intercomparison and evaluation over a Sahelian site..., T. J. (1993), III. measuring surface soil moisture using passive microwave remote sensing, Hydrol. Processes..., J., and T. Hogue (2012), Improving spatial soil moisture representation through integration of AMSR-E and MODIS..., M. McCabe, and J. Evans (2011a), Developing an improved soil moisture dataset by blending passive and active microwave...>2.0.CO;2. Njoku, E. G., and D. Entekhabi (1996), Passive microwave remote sensing of soil moisture, J. Hydrol., 184..., M., R. de Jeu, and J. Walker (2001), A methodology for surface soil moisture and vegetation optical depth..., and A. A. Berg (2004), Global soil moisture from satellite observations, land surface models, and ground..., D. Fernandez, J. Benveniste, E. Haas, and M. Ertl (2012), Fusion of active and passive microwave observations to..., and Y. Rahmat-Samii (2001), Passive active L-and S-band (pals) microwave sensor for ocean salinity and soil moisture...



Дата загрузки: 2017-06-16
Скачать документ
Скачать текст
0.02/5
... Millimetre Wave and Terahertz Sensors and Technology. . . . . . . . . . . . . . . . . . . . . . . 63 7830 Image and Signal Processing... and Sensor Networks V (Carapezza) p. 53 Conf. 7837: Passive Millimetre-Wave and Terahertz Imaging and... up these challenges, mostly active imaging, infrared detection and sources, hyperspectral imaging... research in radars and electromagnetism, optronics, micro and nanotechnologies and space physics. 6 16... cycle), or platform (e.g. SMOS for soil moisture and salinity), or both (Calipso for... and manufacturing high power and high performances 1.0µm and 1.5µm pulsed or CW fiber lasers and... and amplifying very low levels of light and radiation Industry and Science, Medical and Night Vision: Image Intensifiers, ICCDs and... Conference 7824 15.50: Global soil moisture maps using SMOS, Yann H. Kerr... detection of hydrological processes with passive L-band data from SMOS, Ahmad... Remote Sensing 16.10: SMOS soil moisture values evaluation over Sahelian area... Tamarix spp vegetation to the soil saline based on ground spectral... Sciences (China). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [7824-68] Surface soil humidity retrieval using remote sensing... Administration (China). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [7824-23] Surface soil humidity retrieval by means of...: Leaf area index and fraction of photosynthetically active radiation fluctuations in New... inertia model for soil water content retrieval using thermal and multispectral images... 15.30 15.50: Global soil moisture maps using SMOS, Yann H. Kerr...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [7824-15] 16.10: SMOS soil moisture values evaluation over Sahelian area... detection of hydrological processes with passive L-band data from SMOS, Ahmad...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [7826-30] 16.10: NASA’s soil moisture active and passive (SMAP) mission, Kent Kellogg, Eni... sensor fill factor and active area shape for optimal MTF and SNR, Cynthia...-75] 14.40: A remote sensing soil disturbance model of Valley Fever... of an optical particle counter and a passive mini-DOAS remote sensing system..., DOAS, and Other Spectrometric Methods Development of a VDI guideline for passive FTIR.... (China). . . . [7827-41] Lidar, Radar, and Passive Atmospheric Measurement Techniques Mapping temporal... to 12.00 Lidar, Radar, and Passive Atmospheric Measurement Techniques Session Chair... vapor detection by ground-based passive infrared sensors at near horizon... Defence, Security and Safety (Netherlands). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [7828-08] 09.20: Passive cross-wind... of polarimetric RADARSAT2 images for soil moisture retrieval in an alpine catchment... C-band SAR images for soil moisture retrieval in bare and vegetated areas, Claudia....40: Exploitation of C- and X-band SAR images for soil moisture change detection estimation....10: Unbiased query-by-bagging active learning for VHR image classification...-34] 12.00: Assessment of soil surface BRDF using an imaging...] Band selection method for retrieving soil lead content with hyperspectral remote... cloudy conditions integrating Raman Lidar and passive microwave observations, Fabio Madonna, Antonella... of an optical particle counter and a passive mini-DOAS remote sensing system... Wave and Terahertz Sensors and Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 7838A Optics and Photonics for Counterterrorism and...-target multi-sensor localization and tracking using passive antenna and optical sensors on UAVs, Marek Schikora, Fraunhofer FKIE (Germany) and....00 to 10.00 Active & Passive Imagers, Image Sensing and Processing Session Chairs...-03] 09.40: Dynamic filters: passive solutions for increasing dynamic range.... 15.30 to 17.10 Active Technology and Novel Materials Session Chairs... of an active burst illumination imaging system: comparison between experimental and modelled...: an EDA initiated study on active imaging, Ove Steinvall, Ingmar G. Renhorn.... 10.30 to 12.10 Passive Electro-Optical Systems Session Chair...] 13.40: Real-time THz active imaging: comparison test of commercial...-10] 14.20: Fully-polarimetric passive MMW imaging systems for security...-22] Calibration source and temperature standard for passive millimetre wave imagers, Christopher...) 10.50: Passive millimeter wave imaging using a distributed aperture and optical upconversion... a digital beam-forming real-time passive millimetre wave imager, Neil A. Salmon....30: Trade-off assessment for a passive near-field imaging system, Francesco... Research and Development Canada (Canada) . . . . . . . . . . . . . . . . . . . . . . . . . [7838A-17] 11.50: High-resolution active laser imaging and range gating at 1.5 μm up... of multiphoton nonlinear absorbers for passive all-optical sensor protection against...



Дата загрузки: 2017-06-14
Скачать документ
Скачать текст
0/5
... climatic forcing and/or changing catchment processes, e.g. land cover and soil moisture data, which...), evapotranspiration (Rodell et al., 2011) and soil moisture (dall'Amico et al., 2012.../use (and consequently trends in the riparian development of a lakeshore), soil moisture and elevation... variables (e.g. evapotranspiration, precipitation and land surface temperature), soil moisture and vegetation properties. Taking the... and latitude to produce estimates of evapotranspiration, soil moisture storage, snow storage, surplus and runoff (McCabe and Markstrom, 2007...-temporal estimates of evapotranspiration, soil moisture, snow cover and runoff (Ludwig et al... sensed soil water content, also known as soil moisture (Wang and Qu, 2009) and the... concerns. 3.2.2. Soil moisture The most common method for the retrieval of soil moisture is the use of microwave remote sensing sensors, both active and passive, and dates back to the 1970s (e.g. Eagleman and Ulaby, 1975...; Njoku and Kong, 1977; Mo et al., 1982). Remotely sensed soil moisture can only be estimated in the uppermost layer of the soil... observations within Soil-Vegetation-Atmosphere Transfer (SVAT) models helps retrieve soil moisture in... measuring soil moisture lies in the fact that changes in the soil dielectric... dense vegetation cover and soil roughness introduce noise to soil moisture measurements (e.g. Wagner et..., 2008). Microwave instruments used in soil moisture retrieval include the non-operational... that are desired for soil moisture retrieval. Nevertheless, soil moisture retrieval methods based on...; Parinussa et al., 2012). ESA's Soil Moisture and Oceanic Salinity (SMOS) (30–50..., NASA's Soil Moisture Active and Passive (SMAP) mission carries on-board active and passive L-band sensors and was launched... soil moisture at a spatial resolution of 9 km, with a revisit time of 2–3 days. Soil moisture... long soil moisture dataset by merging active (ERS AMI-SCAT and METOP ASCAT) and passive (SMMR, SSM/I, TMI, and AMSR-E) soil moisture... of soil moisture include gravity recovery instruments (Seneviratne et al., 2010) and even... water content (TWC), including soil moisture, groundwater, snow and surface water, result in... SMOS and SMAP sensors, and have shown the potential to estimate soil moisture at... on the remote sensing of soil moisture. 3.2.3. Precipitation Precipitation estimates with remote... and regulation; migratory species; tourism Evapotranspiration Precipitation Soil moisture Water, snow/ice extent and..., K., Bonekamp, H., Figa, J., Anderson, C., 2007. Initial soil moisture retrievals from the METOP-A Advanced..., E., Gao, H., Starks, P., Bosch, D., Lakshmi, V., 2003. Soil moisture estimates from TRMM Microwave Imager.... Global soil moisture patterns observed by space borne microwave radiometers and scatterometers. Surv..., F.T., 1975. Remote sensing of soil moisture by Skylab radiometer and scatterometers sensors. J. Astronaut..., T.J., Hsu, A.Y., Neill, P.E.O., 2002. Surface soil moisture retrieval and mapping using high-frequency microwave... surface heterogeneity on surface soil moisture retrievals from passive microwave data at the... satellite radar altimetry, SAR surface soil moisture and GRACE total storage changes for.... Theory for passive microwave remote sensing of near-surface soil moisture. J. Geophys. Res..., E.G., Jackson, T.J., Lakshmi, V., Chan, T.K., Nghiem, S.V., 2003. Soil moisture retrieval from AMSR-E. IEEE Trans.... Parinussa, R.M., Holmes, T.R.H., de Jeu, R.A.M., 2012. Soil moisture retrievals from the WindSat spaceborne..., R.D., Liu, P., 2007. Comparison and assimilation of global soil moisture retrievals from the Advanced... intercomparison of ERS-Scat and AMSR-E soil moisture observations with model simulations over..., T.T., Geiger, F., 1974. Remote sensing of soil moisture with microwave radiometers. J. Geophys. Res..., E.B., Lehner, I., Orlowsky, B., Teuling, A.J., 2010. Investigating soil moisture–climate interactions in a changing climate... profile soil moisture and groundwater variations using GRACE and Oklahoma Mesonet soil moisture data. Water..., F., Feyen, J., 2008. Assessment of evapotranspiration and soil moisture content across different scales of... first global remotely sensed soil moisture data with model and precipitation data. J. Geophys... of microwave remote sensing of soil moisture for hydrologic applications. Nord. Hydrol... active and passive microwave observations to create and essential climate variable data record on soil moisture. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial... remote sensing applications for surface soil moisture monitoring: a review. Front. Earth Sci... of soil moisture and vegetation water content using SSM/I data over a corn and soybean... near-surface soil moisture from microwave radiometric observations: current status and future plans...



Дата загрузки: 2017-06-14
Скачать документ
Скачать текст
0.14/5
... of retrieved (a) soil wetness index from ASCAT and (b) volumetric soil moisture content from SMOS satellite over Australia. .......................................................................................................................18  Fig. 6  Volumetric soil moisture... (a) surface and (b) root-zone soil moisture, as a function of the open-loop and observation... predicted soil moisture deficit. With advancements in the science of soil moisture measurement and modelling... partly based on soil moisture deficit 1 SOURCES OF SOIL DRYNESS MEASURES AND FORECASTS FOR... and Byram, 1968) or Mount’s Soil Dryness Index (SDI; Mount, 1972). The soil moisture... the relationship between live vegetation moisture content and soil moisture into account by employing..., and cumulative precipitation. The Swedish Meteorological and Hydrological Institute (SMHI) calculates the soil moisture... the presence of hydrogen and soil moisture represents the largest and most variable source... decreases non-linearly with increasing soil moisture and, theoretically, ranges from about 70... SOIL DRYNESS MEASURES AND FORECASTS FOR FIRE DNAGER RATING 5. REMOTE SENSING OF SOIL MOISTURE In situ soil moisture..., aggregated soil moisture mapping (Lakshmi, 2013). Advances has been made in active and passive satellite remote sensing techniques to provide unique capability of measuring soil moisture at regional and global scale which satisfy the science and application... estimate soil moisture, including gamma radiation (Carroll, 1981), thermal infrared (Price, 1982), and passive and active... for soil moisture retrievals, sensitivity and scaling studies at different spatial scales and also... soil moisture in governing the spectral gradient. 13 SOURCES OF SOIL DRYNESS MEASURES AND FORECASTS FOR FIRE DNAGER RATING Fig. 4 5.3 Overview of soil moisture....7, and 37 GHz were used to produce global retrievals of soil moisture and were then validated against climatologies and in situ...., 2008). Soil moisture retrievals are produced from the C-band (6.92 GHz) passive brightness... – NASA algorithm and which contains soil moisture retrievals from both the C- and X-band, with... (MIRAS) on board Soil Moisture and Ocean Salinity (SMOS) satellite, and the Advanced Scatterometer... (1.4 – 1.427 GHz) frequencies and provide global maps of soil moisture and vegetation water content... of retrieved (a) soil wetness index from ASCAT and (b) volumetric soil moisture content from SMOS satellite over Australia. SOURCES OF SOIL DRYNESS MEASURES AND... 31st January 2015) is the Soil Moisture Active/Passive mission (SMAP) by NASA. SMAP... of both passive and active microwave sensors and is expected to provide soil moisture measurements at a much higher resolution than the current passive radiometers..., soil moisture sensors and satellite observations of vegetation cover, flooding, soil moisture, precipitation, evaporation and groundwater... AWRA and WaterDyn skills in simulating evapotranspiration and root zone soil moisture are lower... soil moisture as a prognostic variable. The simulated soil moisture is rather a model specific quantity and... OF SOIL DRYNESS MEASURES AND FORECASTS FOR FIRE DNAGER RATING Fig. 6 7.1 Volumetric soil moisture... of the analysed soil moisture. While the fraction of bare soil and vegetation root... the model soil moisture. The ACCESS NWP soil moisture nudging scheme is only active in... soil moisture nudging is performed four times a day and only adjusts model soil moisture for... soil moisture. The soil moisture nudging scheme only uses observations of screen level temperature and humidity and... (a) surface and (b) root-zone soil moisture, as a function of the open-loop and observation.... (2011). Soil moisture estimation through ASCAT and AMSR-E sensors: an intercomparison and validation study..., G., & Liu, Q. (2012). Assimilation of passive and active microwave soil moisture retrievals. Geophysical Research Letters, 39...). Soil moisture active and passive microwave products: inter-comparison and evaluation over a Sahelian site. Hydrology and Earth...: Soil moisture. Hydrological Science, 41, 517-530. 34 SOURCES OF SOIL DRYNESS MEASURES AND... SMOS soil moisture product with in-situ and modelled data in Italy and Luxemburg...). Windsat soil moisture algorithm and validation. Proceedings of the International Geoscience and Remote Sensing... soil moisture. Geophysical Research Letters, 31, L19501. 36 SOURCES OF SOIL DRYNESS MEASURES AND... of soil moisture and vegetation water content using SSM/I data over a corn and soybean...



Дата загрузки: 2017-05-21
Скачать документ
Скачать текст
0.11/5
... Precipitation Estimation by Space-based Passive and Active Microwave Measurements Peng Zhang, Danyu..., . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inversion of Snow Emission from Passive Microwave Time-series Observation Using... Relationship between Snow Cover Fraction and Passive Microwave Brightness Temperature Tao Che... SMOS First Results Successes and Issues: Towards Global Soil Moisture and Sea Sea Salinity... Space-based Passive and Active Microwave Measurements P. Zhang, D. Y. Qin, H. Yang, Q. F. Lu, and R. You National... into the algorithm including polar active measurements, polar microwave measurements, ground... Abstract— Inadequate specification of divergence and moisture in the initial conditions of... a variety of sources-passive microwave sensors, infrared sensors, and radar observations are... on the active radar return signal based on both volume and surface... from Passive Microwave Time-series Observation Using Simulated Data Lingmei Jiang1, 2, 3 and... and hemispheric energy exchange and the hydrological significance of snowpack water storage. Passive microwave remote sensing mainly estimate snow depth and water equivalence... cover. The key issue with passive microwave remote estimates is the... depth or SWE retrieval by passive microwave remote sensing. The purpose... a mixed-pixel composed of snow and bare soil surface. The snow layer... 90%, 80%, 70% and to 10% in a passive microwave remote sensing pixel... surface totally covered with bare soil before snow falling. For a specific... and Passive Microwave Brightness Temperature Tao Che1 , Liyun Dai1, 2 , and Xin Li1 1 Cold and Arid Regions Environmental and Engineering Research... in cold regions. At present, passive microwave remote sensing is the... is significant to observe and understand the passive microwave brightness temperature (TB) features of inhomogeneous snow depth and... (e.g., bare soil, river ice and grassland) and analyzed the relationship between TB and SCF... and K band increases with the reduction of SCF on grassland and bare soil, and... Ka band on the grassland and bare soil. With the reduction of... surface of bare soil, and analyze the relationship between TB and SCF. The... band, and when snow is swept, the soil physical temperature decreased, and the... is counteracted by that from soil physical temperature reduction. So, we... TB by considering the soil physical temperature. And found that the TB... Ltd., Krasnoyarsk, Russia Abstract— Moist soil dielectric models (MSDM) in the... software utilities, which use moist soil permittivity models as an important... contemporary radar and radiothermal remote sensing algorithms [1–4]. It provides moist soil complex permittivity values as a function of soil moisture (from dry...), soil temperature (from 10◦ C to 40◦ C), and percentage of clay in soil (from... covers the soil types containing less then 5–7% of organic matter and classified... dielectric constant and loss factor as a function of soil moisture, frequency, and temperature, with..., M. T. Hallikainen, and M. A. El-Rayes, “Microwave dielectric behavior of wet soil — Part 1,” IEEE..., M. T. Hallikainen, and M. A. El-Rayes, “Microwave dielectric behavior of wet soil — Part 2,” IEEE.... 4. Curtis, J. O., C. A. Weiss, Jr. and J. B. Everett, “Effect of soil composition on dielectric properties..., December 1995. 5. Mironov, V. L., L. G. Kosolapova, and S. V. Fomin, “Physically and mineralogically based spectroscopic dielectric... sensing algorithms to retrieve the moisture content of forest topsoil. So... the case of shrub tundra soil, containing at least 90% organic..., are the litter moisture, electromagnetic frequency, temperature, and density of dry litter..., G. Ruffi, J.-P. Wigneron, J. P. Grant, and V. L. Mironov, “Electromagnetic characterization of soil-litter media — Application..., and I. V. Savin, “Temperature-dependable microwave dielectric model for an arctic soil,” IEEE Transactions on Geoscience and Remote Sensing, Vol... application in the upcoming SMAP (Soil Moisture Active and Passive) mission. The objective of the... to provide global measurements of soil moisture and its freeze/thaw state. These.... The rough surface represents the soil interface. The data cube is... surface parameters, which are soil moisture and rms height, and one vegetation parameter, vegetation... the vegetation layer and its interaction with the underground soil surface were... interface of the vegetation layer and soil is considered by modifying the... bare soil scattering and C) The rough surface scattering of the soil was calculated... polarization (HV). In the bare soil model, the HH/VV ratio... usually larger than the bare soil. On the other hand, the... SMOS First Results Successes and Issues: Towards Global Soil Moisture and Sea Sea Salinity... vegetation and the atmosphere is almost transparent enabling to infer both soil moisture and vegetation water content over land and sea surface...



Дата загрузки: 2017-03-09
Скачать документ
Скачать текст
0.09/5
... carry passive microwave instruments on-board that can measure surface soil moisture. Three currently operational missions are the Soil Moisture and Ocean Salinity... quality of surface soil moisture anomalies derived from these passive microwave instruments was... People’s Republic of China. Keywords: soil moisture; passive microwaves; evaluation Remote Sens. 2017... based on a component from both active and passive microwave sensors. In this study... further integration of surface soil moisture retrievals from various passive microwave instruments into the existing ECV-SM framework. Another soil moisture... widely used for surface soil moisture retrievals from passive microwave observations is the... on the comparison of soil moisture products from different passive microwave instruments over the entire mainland. These surface soil moisture products... 2.1. Passive Microwave Sensors The main focus of this study is on soil moisture anomalies from three different passive microwave sensors, MWRI (Section 2.1.1), AMSR2 (Section 2.1.2) and... descending and ascending paths, respectively. Of specific relevance for soil moisture retrievals and their... Table 1. 2.2. Passive Microwave Retrieval Algorithms Two different soil moisture retrieval algorithms for passive microwave... low microwave frequencies and the complementarity with soil moisture data from active microwave observations... vegetation optical depth and soil moisture from low frequency microwave observations and is based... evaluate passive microwave surface soil moisture through this technique is using an additional active... the estimation of soil moisture conditions. In line with the passive microwave sensors.... ASCAT soil moisture data was projected on a global 0.25◦ grid and soil moisture data from the ascending and descending grids were... based soil moisture and isby caused by the attenuation the soil (moisture) for microwave based soil moisture and is caused the attenuation of the soilof(moisture... independency the soil moisture which are determined through the same passive same passive microwavethat observations beenmoisture used forretrieval. soil moisture NDVI microwave... temperatures to soil moisture. In particular, [34] demonstrated this for passive microwave products... large-scale surface soil moisture evaluation studies is soil moisture from an active and passive microwave source... passive microwave products were swapped and evaluated. Finally, since the true soil moisture conditions are unknown, ASCAT soil moisture... in soil moisture. al.al. [37] precipitation and thethe subsequent changes in in soil moisture... combinations and presented in Figure 3. RMSE from the six passive microwave soil moisture also... data and presented in Figure 3. RMSE from the six passive microwave soil moisture products... and presented in Figure 3. RMSE from the six passive microwave soil moisture combinations and presented in Figure 3. RMSERepublic from the six passive microwave soil for moisture... the Triple Collocation and RRMSE value techniques for the passive soil moisture and presented. Results... product MSE from the six passive microwave soil moisture s for these specific product... [43] and uses the 5. A direct Tripleand Collocation and R techniques for the soil moisture product... using soil and presented in Figure 3.these RMSE from sixsimilar passive microwave soil moisture densely... soil moisture retrievals (for LPRMv06 and L-MEB) over our study moisture anomalies from the C- and... as soil moisture and it was demonstrated that soil moisture retrieval from the MWRI and AMSR2... of these passive microwave products against each other. The daytime soil moisture products..., as well as soil moisture from the recent and dedicated Soil Moisture Active and Passive mission once this..., H. A method for estimating soil moisture from ERS scatterometer and soil data. Remote Sens. Environ... monitoring of soil moisture using passive microwave-based techniques—Theoretical basis and overview of..., J. Developing an improved soil moisture dataset by blending passive and active microwave satellite-based retrievals..., V. Error characterization of global active and passive microwave soil moisture datasets. Hydrol. Earth Syst. Sci... comparison of passive (SMOS) and active (ASCAT) satellite based microwave soil moisture retrievals with soil moisture simulations... land surface temperature on soil moisture anomaly detection from passive microwave observations. Hydrol..., J.; Llorens, P. Soil moisture estimation through ASCAT and AMSR-E sensors: An intercomparison and validation study...



Дата загрузки: 2017-03-18
Скачать документ
Скачать текст
Скачать перевод
Посмотреть билингву
0.09/5
..., Soil Moisture Active-Passive (SMAP) and Ice, Cloud, and Land Elevation Satellite (ICESat)-2, by CY 2016 and... into the movement and distribution of fresh surface water, and Active Sensing of Carbon dioxide Emissions over Nights, Days and Seasons... integration and testing of the observatory and the observatory Pre-Ship Review; - Soil Moisture Active and Passive... (SWOT) and Active Sensing of CO2 Emissions over Nights, Days, and Seasons (ASCENDS... Data and Information System (EOSDIS), the Distributed Active Archive Centers (DAACs) and their... 2.1.4.2: ES-12-9 Successfully complete the Soil Moisture Active-Passive (SMAP) Critical Design Review. Earth... distribution and cycling of carbon among the Earth's active land, ocean, and atmospheric reservoirs. Global Modeling and Assimilation Office....6 Soil Moisture Active and Passive (SMAP) 70.0 - 135.2 172.3 31.1 29.6 14.5 Other Missions and Data... and infrared multi-spectral global imagery, atmospheric temperature and moisture profiles, total ozone and stratospheric ozone profiles, and measurements of... Formulation section of this document. Soil Moisture Active and Passive (SMAP) The SMAP mission, a Tier... provide new global measurements of soil moisture and land its freeze/thaw state... in hydrospheric science and applications. Direct measurements of soil moisture and freeze/thaw state are needed to improve understanding of regional and..., and the processes that link the water, energy, and carbon cycles. Soil moisture and freeze... and initial instrument refurbishment. Active Sensing of CO2 Emissions over Nights, Days, and... the sources and sinks of atmospheric CO2. ASCENDS is an active system... measurements from the active ASCENDS instruments will continue and complement the OCO... Systematic Missions Other Missions and Data Analysis (continued) Active Cavity Radiometer Irradiance... Earth Science Distributed Active Archive Center (GES DAAC) Archival and distribution of... Same CrIS ITT Aerospace Temperature and moisture profiles at 3.9-15.4 microns. Same... ATMS NG Electronic Systems Temperature and moisture profiles at 22 channels / 23... space through combined use of active and passive remote-sensing techniques. These advanced... be used to calibrate dedicated and operational passive microwave sensors, with the... surface water fluxes, soil moisture storage, cloud/precipitation microphysics and latent heat release... Observatory will leverage passive microwave measurements from other operating and planned "satellites..., but given the prevalence of passive microwave instruments on operational satellite...'s two scientific instruments will provide active and passive microwave measurements of precipitation. The...). When calibrated with existing and planned passive microwave measurements from other satellites... Earth Science Earth Systematic Missions Soil Moisture Active and Passive (SMAP) FY 2012 Budget Request... provide unique information on global soil moisture and its freeze/thaw states to... Earth science and applications decadal survey. Direct measurements of soil moisture and freeze/thaw states are needed to improve understanding of regional and... the water, energy, and carbon cycles. Obtaining global soil moisture measurements every three..., ecosystem, weather, and climate). SMAP is based on the soil moisture and freeze/thaw... of soil emission and backscatter to sense the top five centimeters of soil... analyzed to yield estimates of soil moisture and freeze/thaw state. Data will... assess random errors and regional biases in the soil moisture and freeze/thaw estimates... Earth Science Earth Systematic Missions Soil Moisture Active and Passive (SMAP) Estimated Project Deliverables SMAP... prime mission. SMAP will make soil moisture measurements around the entire Earth... Radiometer provides soil moisture measurements in the top 5 Same cm of soil through... SAR provides soil moisture measurements in the top 5 cm of soil through moderate... Earth Science Earth Systematic Missions Soil Moisture Active and Passive (SMAP) Project Management JPL has... and services. NASA Earth science information is archived at eight Distributed Active... valuable for maintaining active involvement of the research and modeling communities involved..., using algorithms and software developed by EOS investigators; - Active archive of all... efficiency and effectiveness of EOSDIS while reducing the cost, and the Distributed Active Archive Centers, which collect, disseminate, and archive Earth... techniques for validating space-borne soil moisture measurements that will be used...-10 and focused on such areas as space-qualified laser transmitters, passive optical technologies, and microwave and calibration technologies. During FY 2010 there were 16 active projects...



Дата загрузки: 2017-04-09
Скачать документ
Скачать текст
0.2/5
... ...................................................................................... 24 7.1 PASSIVE ECV PRODUCT ................................................................................................................................. 24 iii ECV Production, Fusion of Soil Moisture Products... products to the final blended active & passive microwave soil moisture product. (Figure taken from... soil moisture product in this study. (a, b, c) CDF curves of AMSR-E, Noah and ASCAT soil moisture... passive and active microwave product against the GLDAS-1Noah simulation. (a) GLDAS-1-Noah soil moisture; (b) merged passive microwave product and one rescaled against GLDAS... and temporal coverage of soil moisture products from different sensors in the “blended passive & and active... (area covered by passive, active and both are 29.1%, 69.2%, and 1.7%, respectively), (b) January 1998... of passive and active microwave instruments and model product. 7 vi ECV Production, Fusion of Soil Moisture... Scatterometer SMAP Soil Moisture Active and Passive mission SMMR Scanning Multichannel Microwave Radiometer SMOS Soil Moisture and Ocean... the original active microwave soil moisture products into an ECV based on active observations (period 1991-now), (2) merging the original passive microwave soil moisture products into a passive ECV (1978-now), and (3) blending the... surface model soil moisture estimates serve as a reference for scaling the active and passive ECVs... retrieval and error characterisation of the ECV_SM blended soil moisture products from active and passive microwave..., E. Haas, M. Ertl (2012) Fusion of active and passive microwave observations to create an... improved soil moisture dataset by blending passive and active microwave satellite-based retrievals. Hydrology and Earth...). Trend-preserving blending of passive and active microwave soil moisture retrievals, Remote Sensing of Environment...) soil moisture data set involves three steps (Figure 1): (1) merging the original passive microwave soil moisture products into one product, (2) merging the original active microwave soil moisture products into one product, and (3) blending the... and validating the merged soil moisture product are: • Scatterometer-based soil moisture products o Sensors: ERS-1/2 and... products to the final blended active & passive microwave soil moisture product. (Figure taken from... The level 2 surface soil moisture products derived from the active and passive remotely sensed data... rescaled passive and active time series into passive and active data sets, respectively 5. Rescaling merged passive and passive data sets into common climatology 6. Combining rescaled merged passive and active data sets into single product 5 ECV Production, Fusion of Soil Moisture... the modelled soil moisture datasets no resampling is required. The LPRM (passive) soil moisture estimates... active microwave data. 5.2 Rescaling Used in: Step 2 and 4 8 ECV Production, Fusion of Soil Moisture...: 1) Rescaling of all the passive microwave soil moisture observations to the climatology of AMSR-E. 2) Rescaling of all the active microwave soil moisture observations to the climatology of ASCAT 3) Rescaling of the merged active and passive...-E soil moisture retrievals were identified as are more accurate than the other passive... active microwave products An example of a soil moisture time series from ERS SCAT and... passive and active microwave products obtained in the previous sections represent volumetric soil moisture (m3m-3) and... passive and active microwave product against the GLDAS-1-Noah simulation. (a) GLDAS-1-Noah soil moisture; (b) merged passive microwave product and one rescaled against GLDAS... and temporal coverage of soil moisture products from different sensors in the “blended passive & and active... than 0.65 (“transitional regions”) both active and passive microwave products are used. This... (area covered by passive, active and both are 29.1%, 69.2%, and 1.7%, respectively), (b) January 1998... the ECV_SM workflow merging individual passive soil moisture products into a merged climatology is... density and availability For the current product version combining the active and passive ECVs into a merged active/passive ECV is based...). Trend-preserving blending of passive and active microwave soil moisture retrievals. Remote Sensing of Environment... improved soil moisture dataset by blending passive and active microwave satellite-based retrievals. Hydrology and Earth...



Дата загрузки: 2017-04-09
Скачать документ
Скачать текст
0.27/5
.... Hydrology and Earth System Sciences Error characterisation of global active and passive microwave soil moisture datasets W. A. Dorigo1 , K. Scipal2 , R. M. Parinussa3 , Y. Y. Liu3,4,5 , W. Wagner1 , R. A. M. de Jeu3 , and... several globally available soil moisture products from active (ASCAT) and passive (AMSR-E and SSM/I) microwave sensors... the active and passive satellite-based datasets, we used the ERA-Interim and GLDAS... of global soil moisture products have become available from past and present passive and active coarse... al.: Error characterisation of global active and passive microwave soil Table 1. Operational products in... field of global monitoring of soil moisture using active and passive satellite microwave instruments (sorted... (VUA) and NASA 1979–present 2008 Owe et al. (2008) Soil Moisture and Ocean... collocation technique to soil moisture data products extracted from passive microwave remote www... characterisation of global active and passive microwave soil sensing, land surface modelling and high density... uncertainty of various recent passive (radiometer) and active (scatterometer) microwave soil moisture products. Herein, the... and vertical polarized observations at C-, X, or Ku-band to solve for soil moisture and....: Error characterisation of global active and passive microwave soil the Tiled ECMWF Scheme for... Assimilation System (GLDAS) provides soil moisture and other atmospheric and land surface variables at..., soil moisture values rarely drop below 0.05 m3 m−3 or exceed 0.45 m3 m−3 . Soil moisture and... estimates SCAT (scatterometer-derived soil moisture), RAD (radiometer-derived soil moisture) and Hydrol. Earth Syst... al.: Error characterisation of global active and passive microwave soil datasets considered. This is... al.: Error characterisation of global active and passive microwave soil a) 90°N 60°N 30°N 0° 30... characterisation of global active and passive microwave soil However, a quantitative interpretation and a direct comparison of... al.: Error characterisation of global active and passive microwave soil a) 90°N 60°N 30°N 0° 30....: Error characterisation of global active and passive microwave soil as the trends in error... soil moisture variability and in areas where the signal-to-noise ratio of soil moisture..., radiometer and reanalysis soil moisture datasets and shows the improvements of ASCAT and AMSR-E compared... for active and passive datasets can be ascribed to the observation principle (active versus passive) and how much depends on the retrieval method itself. Including soil moisture... out the limited soil moisture retrieval capability of Cband passive microwave observations over... al.: Error characterisation of global active and passive microwave soil a) 90°N 60°N 30°N e* [m3m... global active and passive microwave soil the soil moisture deviations, particularly in areas with high soil moisture dynamics and areas with a low signal-to-noise ratio of soil moisture... met for the combination with active soil moisture datasets and other sources need to... identify systematic differences and agreements between active and passive microwave-derived soil moisture products, and between different... active and passive observations for the generation of superior multi-mission long-term soil moisture..., W., De Jeu, R., Hasenauer, S., and Su, Z.: Merging active and passive microwave soil moisture data to contruct long... soil moisture: Data assimilation experiments with ECMWF’s integrated forecast system and the TMI soil moisture..., E., Njoku, E., Timouk, F., Wagner, W., and Zribi, M.: Soil moisture active and passive microwave products: intercomparison and evaluation over a Sahelian..., 2010. Jackson, T. J., Schmugge, T. J., and Wang, J. R.: Passive microwave sensing of soil moisture under vegetation canopies.... Jackson, T. J.: III. Measuring surface soil moisture using passive microwave remote sensing, Hydrol. Process... of global active and passive microwave soil by space borne microwave radiometers and scatterometers, Surv... Scanning Radiometer (AMSR-E) Algorithm of Soil Moisture and Vegetation Water Content, Annual Journal..., T. J., Njoku, E. G., R¨udiger, C., Calvet, J. C., and Bindlish, R.: WindSat global soil moisture retrieval and validation, IEEE T. Geosci..., A. I. J. M., McCabe, M. F., and Evans, J. P.: Developing an improved soil moisture dataset by blending passive and active microwave satellite..., Z., Hasenauer, S., and Wagner, W.: An Improved Soil Moisture Retrieval Algorithm for ERS and METOP Scatterometer..., V., Chan, T. K., and Nghiem, S. V.: Soil moisture retrieval from AMSR-E, IEEE Transactions on Geoscience and Remote.... Owe, M., De Jeu, R., and Walker, J.: A methodology for surface soil moisture and vegetation optical depth..., M. K., and Fung, A. K.: Microwave Remote Sensing, Active and Passive: Radar Remote Sensing and Surface Scattering and Emission..., W., Lemoine, G., and Rott, H.: A method for estimating soil moisture from ERS scatterometer and soil data, Remote...