Спутник ДЗЗ. Sentinel 1A. [Редактировать]

Европейский спутник дистанционного зондирования Земли, который входит в ОГ КА по глобальному мониторингу окружающей среды и безопасности “Copernicus” (предыдущее название GMES) . Разработан “Thales Alenia Space”, которая отвечала за проектирование, разработку и интеграцию аппарата. На борту изделия “Sentinel 1” установлена РЛС с синтезированной апертурой/C-SAR (разработана компанией  “Astrium”), которая обеспечит всепогодную  поставку космических снимков. Съемка будет выполняться в С-диапазоне (длина волны 6 см). После обработки данных в некоторых режимах пространственное разрешение достигнет 1х1 м.
Космический аппарат базируется на платформе Thales Aliena Space PRIMA. Стабилизация аппарата на орбите осуществляется по трем осям с точностью 0.01º. Точность определения положения орбите 10м (по каждому направлению, 3σ). Конструкция аппарата имеет тип параллелепипеда. Центральная часть аппарата выполнена из алюминия с центральной структурой из укрепленной углеволокном пластмассы. При конструировании использовался модульный подход, который позволил производить отдельную интеграцию и тестирование полезной нагрузки, перед интеграцией с платформой аппарата. Конструктивно платформа PRIMA включает три главных модуля, которые функционально разъединены, чтобы допустить параллельную интеграцию модулей.

Модули платформы:

  • SVM (обслуживающий модуль) - несет все обслуживающие системы кроме двигательных установок.
  • PPM (двигательный модуль), несет все системы коррекции орбиты.
  • PLM (модуль полезной нагрузки), несет все оборудование полезного груза включая антенну радиолокационного наблюдения Земли.

Основные системы аппарата:

  • TCS (подсистема терморегулирования). TCS обеспечивает управление за температурными режимами работы аппарата. В целом TCS пассивен, перераспределение тепла осуществляется путем покачивания теплоносителя по трубопроводам через радиаторы и систему многослойной изоляции. Также на борту расположены нагревательные элементы.
  • EPS (подсистема энергопитания). EPS использует две солнечные батареи для производства электроэнергии. Каждая батарея состоит из 5 элементов на основе GaAs элементов. На конец срока активного существования система позволит генерировать 4.8 кВт энергии. Литиево-ионный аккумулятор имеет вместимость 324 ампер часов. PCDU (система распределения энергопитания) разработана, чтобы обеспечивать защиту электрической системы и эффективное распределение электроэнергии. 
  • AVS (авиационная подсистема). AVS выполняет функции обработки и управления положением аппарата на орбите. Конструктивно представляет собой интегрированное решение, которое выполняет контроль за платформой и полезной нагрузкой.
  • PDHT (система обработки и передачи научных данных). Состоит из систем передачи телеметрии, системы антенн и системы хранения информации. Система передачи двуканальная. Работает в X -диапазоне.
  • PRP (двигательная установка). Состоит из  14 ускорителей расположенных на 4-х сторонах аппарата. Одна из групп ускорителей предназначен исключительно для работы в защищенном режиме.
  • RF. Обеспечивает  передачу команд и телеметрии в S-диапазоне. Система поддерживает шифрование команд.
  • Лазерный коммуникационный комплекс. Должен передавать данные на систему ретрансляции ERDS. Работает по направлению НОО-ГСО. Использует LCT (Лазерный Коммуникационный Терминал) производства Tesat-Spacecom (Backnang, Германия). LCT основан на основе разработок подобного устройства для системы (TerraSAR-X). Мощность передатчика 2.2 Вт. Апертура телескопа 135-миллиметров. Планируется, что данное решение будет типовым. Скорость передачи данных системой составит около 2.8 Гбит/с (1.8 Гбит/с скорость передачи полезной информации).   

Дополнительные наименования

#НаименованияПоиск в новостяхПоиск в документах
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Дополнительная классификация

#Наименования
1Страна оператор(владелец) - Европа
2Страна производитель - Франция
3Тип оператора(владельца) - государственный
4Тип орбиты - НОО
5Радиолокационные спутники ДЗЗ
6Все спутники ДЗЗ

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

#Новостная лента.
12014-10-06. Европейский радар дистанционного наблюдения Земли прошел этап летной отработки и теперь его данные доступны в открытом доступе.Тэги: Sentinel 1A
22015-08-06. ЕКА провело сотое тестирование системы лазерной связи.
Европейское космическое агентство 5 августа провело сотое успешное тестирование высокоскоростной лазерной линий связи между своим радарным спутником наблюдения Земли Sentinel-1A (находится на НОО) и спутником AlphaSat (находится на ГСО). В целом тесты подтвердили правильность выбранной технологии передачи данных. На организацию канала связи пропускной способностью 1.8 Гбит в сек. ушло только 1.1 ватт энергии. Расстояние между КА составило около 48 тыс. км. При этом, при тестирование показало, что канал связи способен существовать как минимум 10 минут и, что особенно важно, не искажать передаваемую информацию. Таким образом, у организаторов проекта, осталась только одна проблема связанная с задержками с запуском новых КА, оснащенных лазерными терминалами.Тэги: Серия EDRSAirbus GroupSentinel 1AЕвропейское космическое агентство
32015-11-28. 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
42016-08-31. ЕКА определилось с причиной падения мощности на космическом аппарате Sentinel-1A.
Инженеры Европейского космического агентства при помощи наблюдений с Земли и данных с установленных на борту космического аппарата Sentinel 1A камер определили, что причиной падения мощности космического аппарата стало столкновение солнечных батарей с микрочастицей. В агентстве также подчеркнули, что СЭП аппарата обладает избыточной мощностью, а следовательно ничего критического со спутником не произошло. Диаметр поврежденной области батарей составил около 40 см. Также специалисты ЕКА указали на то, что в настоящее время частицы менее 5 сантиметров вообще не отслеживаются, так что они не могут ничего сказать о природе той с которой столкнулись солнечные батареи аппарата. Тэги: Sentinel 1AЕвропейское космическое агентство

Технические характеристики

#ХарактеристикаЗначение
1Длина, метра2.8
2Длина (антены), метра12
3Масса, кг2280
4Масса (сухая), кг2170
5Платформа 1xPRIMA платформа
6Площадь поверхности батареи, квадратных метров20
7Высота, метра4
8Скорость (передачи данных по X стволу), мБит в секунду520
9Скорость (передачи команд на аппарат), кбит в секунду4
10Скорость (передачи данных о телеметрии), кбит в секунду16, 128, 512
11Ширина, метра2.5
12Полезная нагрузкаC-диапазонный радар с синтетической апертурой на 5.506 гГц
13Мощность, Вт5900
14Объем (запоминающего устройства), гБайт500
15Разрешающая способность (Strip Map Mode), метра5х5
16Разрешающая способность (Interferometric Wide Swath), метра5х20
17Разрешающая способность (Extra-Wide Mode), метра20x40
18Разрешающая способность (Wave Mode), метра5x5
19Поляризация (Strip Map Mode)VV+VH или HH+HV
20Поляризация (Interferometric Wide Swath)VV+VH или HH+HV
21Поляризация (Extra-Wide Mode)VV+VH или HH+HV
22Поляризация (Wave Mode)VV или HH
23Ширина полосы обзора (Strip Map Mode), км80
24Ширина полосы обзора (Interferometric Wide Swath), км250
25Ширина полосы обзора (Extra-Wide Mode), км400
26Ширина полосы обзора (Wave Mode), км20х20

Характеристики орбиты

#ХарактеристикаЗначение
1Наклонение, град98.2
2Апогей, км696.3
3Перигей, км694.0
4Период, минут98.5
5САС, год7
6Длинный диаметр эллипса, км7066

Пусковые характеристики

#ХарактеристикаЗначение
1Код NSSDC2014-016A

Экономические характеристики

#ХарактеристикаДата измеренияЗначение
1Стоимость (аппарат), млн. долл.2007-10-01310
2Оператор Европейское космическое агентство
3Производитель Thales Alenia Space
4Производитель Astrium

Информация об удачном запуске

#ХарактеристикаЗначение
1Космодром Космодром Куру
2Дата пуска2014-04-03 at 21:02:00 UTC
3Полезная нагрузка 1xSentinel 1A
4Ракета-носитель 1xСоюз-СТА с РБ «Фрегат»

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...-terrestrial scientific infrastructures and Copernicusspecific Sentinel satellites, while the in situ..., comprise of up to 10 ‘Sentinel’ missions. Four of the missions... have two satellites, ‘A’ and ‘B’, whilst Sentinel-5 will have a precursor mission in... mission). Unlike the first three Sentinel missions, Sentinels-4 and -5 will be..., 2014e). The purpose of the Sentinel-5 precursor mission is to avoid... data between Envisat and the Sentinel-5. However, following the sudden malfunction... (European Space Agency, 2012a). The Sentinel satellites are being developed by... is the prime contractor for Sentinel-1, with contributions from Astrium Germany... for Sentinel-2; whilst Thales Alenia Space is again prime contractor for Sentinel... Purpose launch for first satellite Sentinel-1 Synthetic Land and ocean Launched... Land Multi-spectral monitoring and Sentinel-2 Polar-orbit high-resolution 2014...-orbit 2014 instrument topography monitoring Sentinel-4 Multi- Atmospheric instrument monitoring Multi... instrument monitoring Geostationary Sentinel-5 2019 Polar Orbit precursor Sentinel-5 2016 Polar Orbit... by the fact that no Sentinel satellites will have a resolution smaller..., or, in the case of Sentinel-5, by replacing existing missions when... Sentinel-1A, scheduled for 2013 (de Selding, 2012b). ESA had considered putting Sentinel-1A... 2012 mentioned earlier. Although the Sentinel-1 mission carries different instruments to... on subsequent missions, including Sentinel-3, Sentinel-5 precursor and Sentinel-5, which are intended to... Arianespace, with a view to launching Sentinel-1A in 2013 as originally planned... the 3rd April 2014, the Sentinel-1A satellite was launched from the... to the role of the Sentinel satellites and the potential disruption... considered operational when the dedicated Sentinel satellites have not, at the... to land monitoring. Although the Sentinel missions 1 through 3 will complement and... May 2012 demonstrates that the Sentinel missions dedicated to atmospheric and... to the launch of the Sentinel satellites, means that the dedicated... from the absence of a dedicated Sentinel mission for the security theme...,38 particularly given that the Sentinel satellites will be primarily dedicated... the launch of the first Sentinel satellite. This is not to... however that the loss of a Sentinel satellite directly or indirectly through... is not say that the Sentinel satellites will necessarily be targeted... measures for the Galileo and Sentinel satellites designed to counter jamming... NASA safety standard. Requirements 4.3-1 and 4.3-1a establish that “[f]or missions leaving... the “safe decommissioning of the [Sentinel] satellites at the end of... the event of malfunction. The Sentinel missions for Copernicus on the.... However the satellites for each Sentinel mission will not always be... Sentinel-1B satellite in 2016, two years after its sister satellite Sentinel-1A... all the satellites of a particular Sentinel mission fail but the absence..., J. (2012a) ‘Doubts hang over EU’s Sentinel radar mission’, BBC News Science... Failure Changes ESA Calculus on Sentinel Launches’, Space News – Policy, [Online.... European Space Agency (2012b) ‘ESA’s Sentinel Satellites’, ESA GMES observing the.../12. European Space Agency (2012d) Sentinel-1 ESA's Radar Observatory Mission for... Communications. European Space Agency (2012e) Sentinel-2 ESA's Optical High Resolution Mission... Communications. European Space Agency (2012f) Sentinel-3 ESA's Global Land and Ocean.../13. European Space Agency (2013e) Sentinel-2 The Operational Copernicus Optical High.../14. European Space Agency (2014a) ‘Sentinel-1’, ESA Future Missions – Copernicus – Sentinels...-missions/sentinel-1, Accessed: 18/06/14. European Space Agency (2014b) ‘Sentinel-1’, ESA.../14. European Space Agency (2014c) ‘Sentinel-2’, ESA – Our Activities – Observing the.../Copernicus/Sentinel-2, Accessed: 08/05/14. European Space Agency (2014d) ‘Sentinel-3’, ESA....esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinel-3, Accessed: 08/05/14. European...



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SATELITI SENTINEL – VESOLJSKA KOMPONENTA EVROPSKEGA PROGRAMA ZA ..., izstrelitev in operacije skupine satelitov Sentinel ter vzpostavitev operativnih storitev, s katerimi... DISCUSSIONS | 58/3 | GEODETSKI VESTNIK 2 SATELITI SENTINEL Evropska vesoljska agencija (ESA), katere... pripravlja serijo šestih misij satelitov Sentinel (slika 1). Z njimi naj bi zadovoljili... 700 kilometrov od Zemlje zasedel Sentinel-1A, prvi satelit iz prve misije... leta 2020 se bo Sentinelu-1A predvidoma pridružilo še devet drugih... humanitarno naravnane namene. Posnetki satelitov Sentinel bodo v naslednjih dveh desetletjih omogo... razvija novo skupino misij, imenovanih Sentinel (vir: ESA). Najsodobnejši instrumenti, izbolj...č primerov uporabe posnetkov radarskega satelita Sentinel-1A, predvsem za opazovanje in kartiranje... sliki A je prikazan izsek posnetka Sentinel-1A na območju toka reke... prepoznavanja poplav na radarskem posnetku Sentinel-1A (vir: International Charter Space and... in osnovni produkti podatkov satelitov Sentinel so/bodo uporabnikom na voljo... nadaljnjo obdelavo ali uporabo. Sateliti Sentinel in njihova namenska uporaba so... IN UPORABA POSAMEZNIH SATELITOV SENTINEL Skupina satelitov Sentinel je sestavljena iz šestih... misije Sentinel. | 585 | STROKOVNE RAZPRAVE | PROFESSIONAL DISCUSSIONS | 58/3 | GEODETSKI VESTNIK Sentinel-1: Visokoločljivi radarski senzor Izstrelitev Sentinel-1A: 2014; predvidena izstrelitev Sentinel-1B: 2015 Misija Sentinel-1 je sestavljena... oboda tirnice. En sam satelit Sentinel-1 lahko pokrije celotno območje... delo opravita v manj kot tednu. Sentinel-1 ima na krovu za zdaj... ob nesrečah). Oba satelita Sentinel-1 naj bi zbirala podatke vsaj... procesov). Sentinel-2: Visokoločljivi multispektralni optični senzor Predvidena izstrelitev Sentinel-2A in -2B: 2015, 2016 Sentinel-2 bo v polarni... posnetki SPOT in Landsat. Na Sentinel-2 bodo vgrajeni optični senzorji... tudi rastne cikle rastlinstva. Podatki Sentinel-2 se bodo uporabljali za storitve.... Sentinel-3: Večnamenski instrument Predvidena izstrelitev Sentinel-3A in -3B: 2015, 2017 Sentinel... 300 metrov v načinu SAR. Sentinel-3 je misija za globalni monitoring... in podobno. Sentinel-4, -5: Meteorološka satelita Predvidena izstrelitev: 2020 Sentinel-4 in -5 bosta zbirala podatke o sestavi atmosfere. Sentinel-4 se bo...žil tretji generaciji satelitov Meteosat, Sentinel-5 pa v sončno sinhrono tirnico... bo nadaljeval poslanstvo satelitov MetOp. Sentinel-4 bo nosil visokoločljiv spektrometer... bližnje infrardečih kanalih. Sentinel-5 bo s svojim senzorjem UVNS dodatno... v kratkovalovnih infrardečih kanalih. Misiji Sentinel-4 in -5 pokrivata potrebe za kontinuirano... sončnega sevanja ter podnebja. Sentinel-5 Precursor: Meteorološki satelit Predvidena... DISCUSSIONS | 58/3 | GEODETSKI VESTNIK Misijo Sentinel-5 Precursor (predhodnik) razvijajo za zmanj... satelita Sentinel-5. Misija bo imela zelo podobne lastnosti kot njena naslednica Sentinel-5. Sentinel-6: Višinomerski sateliti Predvidena izstrelitev: 2020 Sentinel-6 bo vseboval...



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...-1, -2 Applications Sentinel 1 Services Sentinel 2 Sentinel 3 to initiate long term Sentinel 4/5monitoring systems Sentinel 5PCand services... Sentinel-1, Sentinel-2 and Sentinel-3 (land) ü EUMETSAT is the proposed operator of Sentinel-3 (marine), Sentinel-4 and Sentinel-5 GMES: today‘s status ü The Sentinel-Satellites (1A/B, 2A/B, 3A/B, 4 and 5 Precursor) are under development, Sentinel-5 in... Sentinel-1 – SAR imaging All weather, day/night applications, interferometry 2013 / 2015 Sentinel..., agriculture,… Continuity of Landsat, SPOT Sentinel-3 – Ocean and global land monitoring..., altimetry Sentinel-4 – Geostationary atmospheric Atmospheric composition monitoring, transboundary pollution Sentinel-5 precursor/ Sentinel-5 – Low... GCMs Sentinel-1 A/B/C Sentinel-1 A/B/C 2nd gen. Sentinel-2 A/B/C Sentinel-2 A/B/C 2nd gen. Sentinel-3 A/B/C Sentinel-3 A/B/C 2nd gen. Sentinel-4 A/B (MTG-S1/2) Sentinel-5 Precursor Sentinel-5 A/B (MetOP-SG) Jason-CS A/B Jason-CS Follow-on A/B GSC Evolution Sentinel.... The Sentinel-1 mission is based on a constellation of 2 satellites Sentinel-1A to be launched end 2012 Sentinel-1B under procurement, launch date is TBD (indicatively 2014/2015) Sentinel... scenarios (e.g. inclusion of the 2nd Sentinel-1 satellite, use of European Data... latitudes (Europe ~ 2 days) Per revisit Sentinel-1 mission key operational concepts • Pre... for fresh and past data Sentinel–1: C-band SAR mission 46 § 25... km spacing HH or VV Sentinel–2: Superspectral imaging mission ü Applications: • generic... time, consumables for 12 years Sentinel-2 spectral bands VIS Visible VNIR... 31 2000 nm 2200 nm 2 n Sentinel-2 revisit time Revisit time over... with 2 satellites days 32 Sentinel-2 data latency 33 Sentinel-2 Summary A very large...://www.esa.int/gmes 34 Sentinel–3: Ocean & global land mission ü Applications... time, consumables for 12 years Sentinel–3 mission instruments • Ocean and Land... Sentinel–4/UVN instrument Instrument Coverage: Europe and Sahara Repeat Cycle: 1 hr Sentinel... features (0.05%) High radiometric accuracy: < 3% Sentinel–5 precursor: LEO atmospheric mission ü Applications...-2020 Sentinel Data Policy Principles FREE and OPEN üAnybody can access Sentinel... and scientific use üà open access üSentinel data will be made available... restrictions would apply to specific Sentinel data affecting data availability or... would be activated GMES Sentinel Data Policy Ø The Sentinel data policy will... has adopted joint principles of a Sentinel data policy in Sep 2009... policy; the Sentinel DP is part of it Ø The Sentinel data policy... be issued in 2012); GMES Sentinel Data Policy Principles Ø The overall... Information Policy, which contains the Sentinel Data Policy, is addressed in...) Ø Joint EC/ESA Principles of Sentinel data policy (approved by ESA...) can access acquired Sentinel data for any use ü Sentinel data licenses are free of charge ü The Sentinel data will... security restrictions apply to specific Sentinel data affecting data availability or... be activated. Ø Next step è Finalize Sentinel data policy; EU to prepare...



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... Very High Resolution Radiometer [AVHRR], Sentinel 2 and 3) for use as a reference...)  Launch SAGE III-ISS and Sentinel 5-Precursor as currently planned.  Agencies... Experiment (SAGE) III-ISS and Sentinel 5-Precursor) to maximize scientific output... on launch dates: OCO-2, TanSat, Sentinel-5P, Merlin, GOSAT-2. All developments... 2012  Launch of new satellites – e.g., Sentinel 5 precursor 2014, SAGE III-ISS....org. In mid-2016, the Sentinel 5 Precursor will be launched contributing... profiles and tropospheric ozone content. Sentinel 5 on-board Meteosat Third Generation... 2021 providing the continuity from Sentinel 5 P onwards. 2. Ozone Profiles from Nadir... of new satellites – e.g., Metop-B 2012, Sentinel 5 precursor 2014, SAGE III-ISS... Experiment (SAGE) III-ISS and Sentinel 5-Precursor) to maximize scientific output... including climate research. The Copernicus Sentinel-3 Sea and Land Surface Temperature... Launch date Sentinel-3A SLSTR ESA/EC/EUMETSAT 2015 Sentinel-3B SLSTR... Jason-3 in 2014  Launch of Sentinel-3A in 2013  The ESA... additional data from CryoSat, Altika, Sentinel-3 and Jason-3, the two former..., MERIS, and eventually VIIRS and Sentinel-3 OLCI observations. The following products..., AltiKa and Sentinel-3.  Ice Velocity from ERS-1, ERS-2, Envisat ASAR, Sentinel-1, Radarsat... ice sheet (2014-2017) from Sentinel-1 SAR o Main Greenland glaciers (1991...-sensor InSAR - ERS-1, ERS-2, Envisat, Sentinel-1, Palsar and TerraSAR-X (1991-2017... outlet glaciers from ERS, Envisat, Sentinel-1 and Sentinel2. (1991-2017) Consistency... EU is providing access to Sentinel-1a and 1b (InSAR), which are... cloud). The EU will launch Sentinel-3 (altimetry). References: Hollmann, R., and Coauthors... being demonstrated over Africa with Sentinel-2 and Landsat-8 data. Products are... and specification for future systems (e.g., Sentinel 3, Page | 141 VIIRS). The system... for the new sensor systems (e.g., Sentinel 3 and VIIRS) that are compatible...-2, at the end of 2012, SENTINEL 5P, OCO-3, CARBONSAT, GOSAT-2, and... in 2014, MicroCarb in 2016, SENTINEL 5 in 2018, and JEMDIAL in..., VGT, Proba-V, MODIS, Sentinel-3, as well as Sentinel-2 for small fires in... orbit with Terra MODIS from Sentinel-3 SLSTR. More info on VIIRS... Experiment (SAGE) III-ISS and Sentinel 5-Precursor) to maximize scientific output... on launch dates: OCO-2, TanSat, Sentinel-5P, Merlin, GOSAT-2. All developments....org. In mid-2016, the Sentinel 5 Precursor will be launched contributing... profiles and tropospheric ozone content. Sentinel 5 on-board Meteosat Third Generation... 2021 providing the continuity from Sentinel 5 P onwards. Page | 177 2. Ozone Profiles... Experiment (SAGE) III-ISS and Sentinel 5-Precursor) to maximize scientific output... including climate research. The Copernicus Sentinel-3 Sea and Land Surface Temperature... Launch date Sentinel-3A SLSTR ESA/EC/EUMETSAT 2015 Sentinel-3B SLSTR... additional data from CryoSat, Altika, Sentinel-3 and Jason-3, the two former..., MERIS, and eventually VIIRS and Sentinel-3 OLCI Page | 194 observations. The..., AltiKa and Sentinel-3.  Ice Velocity from ERS-1, ERS-2, Envisat ASAR, Sentinel-1, Radarsat... ice sheet (2014-2017) from Sentinel-1 SAR o Main Greenland glaciers (1991...-sensor InSAR - ERS-1, ERS-2, Envisat, Sentinel-1, Palsar and TerraSAR-X (1991-2017... outlet glaciers from ERS, Envisat, Sentinel-1 and Sentinel2. (1991-2017) Consistency... EU is providing access to Sentinel-1a and 1b (InSAR), which are... cloud). The EU will launch Sentinel-3 (altimetry). References Hollmann, R., and Coauthors... being demonstrated over Africa with Sentinel-2 and Landsat-8 data. Products are..., VGT, Proba-V, MODIS, Sentinel-3, as well as Sentinel-2 for small fires in... orbit with Terra MODIS from Sentinel-3 SLSTR. More info on VIIRS...



Дата загрузки: 2017-11-08
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0.13/5
... Concept, Data Access Susanne Mecklenburg Sentinel-3 Mission Manager European Space Agency... on available data: Sentinel and Contributing Missions  Update on Sentinel-1 launch  Operations... Ground Segment  ESA/EU Sentinel/Copernicus Data Policy  Sentinel-1, -2, -3 Data Access Copernicus... February 2014, Lisbon CSC DATA: SENTINEL & JASON S1A/B: Radar Mission S2A... in ‘pre-operations’ ( = prior to Sentinel launches) • The GMES Space Component... (CCMs) production and dissemination flows • Sentinel Space and Ground Segment development...’ (by similarity to Sentinels) Sentinel-1 Sentinel-2 VHR optical Sentinel-3 Sentinel-4/5 (* supplied by CNES; ** supplied... by a progressive integration of each Sentinel spacecraft in the overall system... 2014, Lisbon FOR EXAMPLE: SENTINEL-1 STATUS Sentinel-1A major milestones QAR KO (Satellite...-14 February 2014, Lisbon SENTINEL-1 RAMP-UP PHASE Sentinel-1 mission operations is... ramp-up allowing adapting the Sentinel-1 exploitation capacity to the increasing... 2014, Lisbon GRADUAL PROVISION OF SENTINEL-1 QUALIFIED PRODUCTS Copernicus User Awareness... 13-14 February 2014, Lisbon SENTINEL-3: CHANGE OF OBSERVATION SCENARIO (I) LRM...-14 February 2014, Lisbon mode SENTINEL-3: CHANGE OF OBSERVATION SCENARIO (II...), providing primary data access to Sentinel Missions and coordinating access functions... from Contributing Missions • Apply the Sentinel Data Policy Sentinels’ Collaborative Ground.../ complementary Sentinel-3 Validation Teams DB Copernicus User Awareness & Training Event Potential Sentinel-3 user involvement 13-14 February 2014, Lisbon 23 SENTINEL CORE PRODUCTS Sentinel-1 Sentinel-2 Sentinel... L1 Sentinel 2A * 200 Mb/s All the different L1 Sentinel 3A 200 Mb/s L1 & L2 Sentinel 1A * (*) based on... 13-14 February 2014, Lisbon SENTINEL-3: NEW PRODUCTS UNDER DEVELOPMENT FRP... 13-14 February 2014, Lisbon SENTINEL COLLABORATIVE GROUND SEGMENT Focus & categories... 13-14 February 2014, Lisbon SENTINEL COLLABORATIVE GROUND SEGMENT National use... the use and distribution of Sentinel data.  ESA is currently assessing... States, in a first step for Sentinel-1, in Q1/2 2014.  International collaboration... Segment important access point for Sentinel data for national use and... 27 SENTINEL DATA POLICY: ESA AND EU APPROVED ESA Copernicus Sentinel Data..., rev.1 )  Anybody can access acquired Sentinel data; in particular no difference... users  The licenses for the Sentinel data itself are free of... for user registration Security relevant Sentinel data (*) Restricted dissemination Terms and... users of security relevant Sentinel data Any other Sentinel data Open Dissemination... and distribution of Sentinel data Sentinel data) (*) so far not Sentinel data has... with users (II): Production Layer Sentinel data made available thanks to... of 500Mb/s of user products (Sentinel-1,-2,-3 A series)  Distributed interconnected network of... to efforts of European Industry  Sentinel-1 Centres and production capacity successfully... launch and commissioning campaign  Sentinel-2 and Sentinel-3 ground segments under nominal development... • Sentinel-1, -2, -3 Data Access unveiled: full presentation available in GSCDA and Sentinel Online.../home • Sentinels Online Webportal https://sentinel.esa.int • Copernicus Space Component...



Дата загрузки: 2017-05-20
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0.07/5
... Based on SPOT-5 Take-5 and Sentinel-1A Data for the Estimation of...-5) and synthetic aperture radar (SAR) (Sentinel-1A) data for crop parameter (basal... are used as a proxy of Sentinel-2 data to evaluate the potential...; land cover change; SPOT-5 Take-5; Sentinel-1A; evapotranspiration; TIGER initiative 1. Introduction Crop... 2 of 20 Equator for the Sentinel-1 constellation and five days at... cloud-free conditions for the Sentinel-2 constellation) and reconfigurable acquisitions (different.... For this purpose, EO data (Sentinel-1A + SPOT-5 Take-5) are evaluated for... other hand, the integration of Sentinel-1A VV + VH polarized data into... To achieve a high temporal resolution, Sentinel-1A and SPOT-5 Take-5 images were... 9 Sentinel-1A images from 26 March to 4 October (Table 1 and Figure 2). Table 1. Sentinel-1A... 2015 Sentinel-1A SPOT-5 SPOT-5 Sentinel-1A SPOT-5 SPOT-5 SPOT-5 Sentinel-1A SPOT-5 SPOT-5 SPOT-5 SPOT-5 Sentinel-1A SPOT-5 SPOT-5 SPOT-5 SPOT-5 SPOT-5 Sentinel-1A SPOT-5 SPOT-5 SPOT-5 SPOT-5 Sentinel-1A/SPOT-5 SPOT-5 SPOT-5 SPOT-5 Sentinel-1A SPOT-5 SPOT-5 SPOT-5 Sentinel-1A SPOT-5 SPOT-5 SPOT-5 Sentinel-1A... 5 of 20 5 of 20 Figure 2. Sentinel-1A andSPOT-5 SPOT-5Take-5 Take-5 acquisition... (DOY 85) to85) to Figure 2. Sentinel-1A and timeline,from from March...). 4 October 2015 (DOY 277). The Sentinel-1 mission comprises a constellation of two... polar-orbiting satellites, operating and Sentinel-1 night and mission performing C-band... the weather. Sentinel-1A was launched on 3 April 2014, while Sentinel-1B and... on 25 April 2016. Thewas Sentinel-1A mission includes SAR imaging in.... Sentinel-1A launched on 3 April 2014, while Sentinel-1B launched modesThe withSentinel-1A different... km). This mission provides dual Sentinel-1 satellite can potentially map the... and rapid product delivery. A single Sentinel-1 satellite mode once every 12... is significantly All of the Sentinel-1A C-band SAR images were made...) for all All of the Sentinel-1A C-band SAR images dates, wereand....87°range to 39.26°. Sentinel-1A complex except for the mode... is necessary to radiometrically correct Sentinel-1A products were used in thisisstudy... available state vector that ESA’s Sentinel-2 willto provide. SPOT-5 images wereusing... a 10-m spatial resolution, similar to Sentinel-2 products. In analogy to the... image time series that ESA’s Sentinel-2 mission will provide. SPOT-5 Take... a 10-m spatial resolution, similar to Sentinel-2 products. In analogy to the... until 15 September 2015. These Sentinel-2-type Remote Sens. 2016, 8, 525... for the exploitation of the Sentinel-2 mission. Remote Sens. 2016, 8, 525... for thesteps exploitation of the Sentinel-2 mission. Level-2A SPOT-5 images... April and Sentinel-1A 19 April and (2) SPOT-5 15 May and Sentinel-1A 13... possible pairs between SPOT-5 and Sentinel-1A images were not used because... + Sentinel-1A VV band; (3) SPOT-5 bands + Sentinel-1A VH band; and (4) SPOT-5 bands + Sentinel-1A VV... behavior of of the theSentinel-1A Sentinel-1Asignal signalwas was also analyzed... close to those of the Sentinel-1A acquisitions (Table have a gap of... days, yet for the pair Sentinel-1A 19 April and SPOT-5 30... between the gamma VV + VH Sentinel-1A bands and Figure 7. Scatterplots of... between the gamma VV + VH Sentinel-1A bands and the the NDVI... Image/Month SPOT-5 April August Sentinel-1A 19 13 6; 30 24 17... 15 4; 29 24 18; 28 Sentinel-1A 19 13 6; 30 24 17... April (SPOT-5) and 19 April (Sentinel-1A) Pair A SVM OA (%) KC (%) 78... May (SPOT-5) and 13 May (Sentinel-1A) Pair B Figure 8 shows the classification... the northern part of the Sentinel-1A images for three to it... the northern part of the Sentinel-1A images for three epochs, 14... Tagus Valley, the use of a Sentinel-1A VH band together with the.... Moreover, when adding only the Sentinel-1A VV band or both SAR... 4.0%. The use of multitemporal C-band Sentinel-1A images along with multitemporal SPOT... multitemporal and multisensor EO data (Sentinel-1A and SPOT-5 Take-5) for crop.... The integration of microwave data (Sentinel-1A) with optical data (SPOT-5 Take... study to simulate the ESA Sentinel-2 time series, is relevant for... (MacDonald, Dettwiler and Associates Ltd.). Sentinel-1 Product Definition; Ref: S1-RS..., A. Avaliação do potencial das imagens Sentinel-1 para identificação de culturas agr...



Дата загрузки: 2017-11-08
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0.11/5
... super heavy carrier rocket 3 SaudiGeoSat-1 5 Sentinel 2 8 Sentinel-6A 7 Soyuz TMA-18M 5 VAMP... Communications Military communications Communications Soyuz 2.1a New Shepard RUS USA Cargo... a PSLV Launch vehicle. Jason-CS/Sentinel-6A Airbus has received an... to build the Jason-CS/Sentinel-6A ocean topography which is... the planned asteroid rendez-vous. Sentinel 2 On 11 June 2015 a Vega... Sentinel 2 satellites in a polar orbit with an altitude of 785 km. Sentinel... for placing satellites in orbit. Sentinel 2 is part of a series of... land, ocean and atmospheric monitoring: • Sentinel-1, a polar-orbiting, all-weather, day... land and ocean services; • Sentinel-2, as described above; • Sentinel-3, a multi-instrument mission... high-end accuracy and reliability; • Sentinel-4, a payload devoted to atmospheric monitoring... (MTG-S) satellite in geostationary orbit; • Sentinel-5, a payload that will monitor the... a MetOp Second Generation satellite; and • Sentinel-6, a payload that carries a radar altimeter... of two satellites. In addition a Sentinel-5 Precursor satellite mission is being... and the launch of Sentinel-5. To date only Sentinel-1A has been launched...



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0.12/5
... доступа к данным со спутников серии Sentinel Европейской комиссии и проведение необходимых проектных... апреля был запущен в космос спутник Sentinel-1A, который предоставляет данные съемки по... со спутника Sentinel-1A. С помощью технологии "лазерный коммуникационный терминал" спутник Sentinel-1A продолжает в тестовом... ретрансляции данных (EDRS) ЕКА. Спутник Sentinel-1A станет первым пользователем EDRS – основы...



Дата загрузки: 2017-05-21
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0.06/5
Analysis of Sentinel-1 radiometric stability and quality for ..., N. Baghdadi, M. Zribi, S. Angelliaume. Analysis of Sentinel-1 radiometric stability and quality for.... remote sensing Article Analysis of Sentinel-1 Radiometric Stability and Quality for... stability of the new SAR Sentinel-1A “S-1A” sensor was first assessed by... invariant targets was compared from S-1A and Radarsat-2 “RS-2” data. The... stable sub-time series of S-1A data. The first (between 1 October... addition, the results show that S-1A images of the first and... RS-2 data, with a difference between S-1A and RS-2 lower than 0.3 dB. However, the S-1A images of the second sub... 1 dB. Keywords: Synthetic Aperture Radar; Sentinel-1A; radiometric stability and quality; Radarsat... Sentinel-1 constellation has been scheduled to ensure continuous monitoring. The first Sentinel-1 sensor, S-1A, was launched on 3 April... the launch of the second Sentinel-1 sensor, S-1B, is scheduled for... repeat cycle for each Sentinel-1 satellite). Aboard Sentinel-1 is a C-band (~5.4 GHz) SAR... radiometric corrections to achieve required S-1A image radiometric accuracy levels. During...). As an outcome of the S-1A commissioning phase, the S-1 IPF was... correction was introduced to the S-1A images acquired on 19 March... expected gain imbalance on acquired S-1A data was reported during the... offset correction was applied to S-1A images acquired on 25 November... radiometric stability and quality of S-1A signals using a times series of.... To assess radiometric stability levels, S-1A images were first calibrated. Second, temporal variations in S-1A backscattering coefficients (σ˝ ) averaged over invariant... radiometric quality levels, a comparison between S-1A and RS-2 σ˝ returned from the... Description In this study, 154 S-1A images of both Ascending and... pixels of 20 m ˆ 22 m. The Sentinel-1 Toolbox [5] was used to calibrate... into backscattering coefficients (σ˝ ). Our geocoded S-1A images have pixel sizes of... the radiometric stability of returned S-1A signals (Figure 1). The first target... (1561 and 2406 pixels for S-1A and RS-2, respectively). The second... approximately 8.1 ha (856 pixels in S-1A). Finally, the third target represents... foliage throughout the year. The S-1A images cover all of the... 3. Data To radiometric stability theallS-1A data, σ˝ -value variations of each invariant Forassess eachthe S-1A image, the valuesofof pixels within...˝ ) (Figure 2). To explain ˝ potential variations 3.1. S-1A temporal Radiometric Stability in σ -values... the radiometric stability of the S-1A data, σ°-value temporal variations of... Sigma Zero (NESZ) value for S-1A (´22 dB) [8]. separately for radar... that enhance the calibration of S-1A products [3,4]. However, for the racetrack..., Sigma Zero (NESZ) value for S-1A (−22 dB) [8]. certain σ˝ -values within... at the same time as S-1A acquisitions. The presence of water... that enhance the calibration of S-1A products [3,4]. However, for the racetrack.... (a) (c) (b) (d) (e) Figure 2. 2. Temporal variations of of S-1A S-1A σ σ°˝ in both VH VH and... Circles denote denote the the S-1A S-1A σ° σ˝ affected affected by by rainfall. rainfall. To quantify the S-1A signal stability for both VH... (M) and standard To quantify the S-1A signal stability for both VH....1 ˘ 0.06(4) ´14.4 ˘ 0.07(3) ´6.2 ˘ 0.17(4) ´7.3 ˘ 0.08(3) 3.2. S-1A Radiometric Quality The radiometric qualities of S-1A data were investigated by calculating the difference between S-1A and RS-2 σ˝ (in VV at 34˝ and 42˝ ) (∆σ˝ = σ˝ S-1A ´ σ˝ RS-2 ) returned for the racetrack... do not fall within the S-1A period of acquisition. However, we assume that S-1A and RS-2 radar signals returned... comparable. The results show that S-1A σ˝ -values in the first and... sub-time series, respectively. Thus, S-1A images acquired prior to 19... to be well calibrated. However, S-1A data acquired between 19 March... an offset of roughly 1 dB (σ˝ S-1A higher than σ˝ RS-2). 4. Conclusions The... quality of the new SAR sentinel-1A “S-1A” sensor. Our results reveal three... the radiometric stability of the S-1A data of the Ascending and... calibrated with a difference of between S-1A and RS-2 σ˝ (in VV polarization... 42˝ ) lower than 0.3 dB. However, σ˝ S-1A from images acquired between 19... radiometric stability and quality of S-1A images acquired prior to February... of a longer time series of S-1A images and more reference data are recommended to fully assess S-1A radiometric stability and quality levels..., 29, 4653–4665. [CrossRef] Miranda, N. Sentinel-1 Instrument Processing Facility: Impact of..., N. Sentinel-1A TOPS Radiometric Calibration Refinement; European Space Agency: Paris, France, 2015. SENTINEL-1 Toolbox. Available online: https://sentinel.esa.int/web/sentinel/toolboxes/sentinel-1/ (accessed...). Geudtner, D.; Torres, R.; Snoeij, P.; Davidson, M.; Rommen, B. Sentinel-1 System capabilities and applications. In...



Дата загрузки: 2017-06-14
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0.05/5
SENTINEL-1A FLIGHT DYNAMICS LEOP OPERATIONAL EXPERIENCE M. A. ...: xavier.marc@esa.int, Abstract: Sentinel-1 is a two-satellite mission with... a C-Band Synthetic Aperture Radar. The Sentinel-1 satellites are part of the... European Earth Observation Copernicus Programme. Sentinel-1A was launched on April 03...) in Darmstadt, Germany during the Sentinel-1A three day LEOP. These activities..., LEOP operations, LEO, Sentinels. 1. Introduction Sentinel-1A was launched by a Russian Soyuz...’s Space port in French Guiana. Sentinel-1A is the first in-orbit... first of a two-satellite System (Sentinel-1B currently planned for launch... for continual data delivery. The Sentinel-1 mission provides continuity of crucial... humanitarian aid and crisis situations. Sentinel-1A is controlled around a sun-synchronous... (MSLTAN) of 18:00 h. Figure 1. Sentinel-1A stowed representation (in RDM and..., and magnetotorquers for wheel unloading. 2 Sentinel-1A operations are conducted at the.... 2. Separation and first acquisition Figure 2. Sentinel-1A LEOP Ground Stations Network and... at 21:02:26 UTC. Sentinel-1A separation from the Fregat-M upper... predicted. Troll station acquired the Sentinel-1A signal without difficulties, reporting a 1 second... of the Solar Array. Figure 4. Sentinel-1A SAR and Solar Array deployment... MET 6 11:00 h (Figure 4 step 6). Sentinel-1A slowly converged to gravity gradient... by JSpOC. 7 Table 2. Summary of Sentinel-1A conjuction risks with ACRIMSAT confirmed... of ACRIMSAT with respect to Sentinel-1A. Epoch (UTC) 2014/04/05... operations timeline which would allow Sentinel-1A to reach NPM and perform... latitude with ACRIMSAT flying above Sentinel-1A in all close approaches. The... posing a real danger to the Sentinel-1A Mission. Mitigating the risk for... in-plane manoeuvre at the Sentinel-1A altitude can be expressed as...-major axis (m) = 2 x 1885 sec x delta-v (m/s) Sentinel-1A Orbit Control Thrusters are located... that ACRIMSAT was flying above Sentinel-1A in the two close approaches... flight direction could have brought Sentinel-1A closer to ACRIMSAT. The Mission... of +/- 3500 rpm. 11 Figure 9 Sentinel-1A rates in S/C frame. Manoeuvre execution... After the three day LEOP Sentinel-1A was stable in NPM and... the two thrusters +X and –X. The Sentinel-1 orbit control S/W (described in [2]) was... more than four hundred manoeuvres Sentinel-1A started the first control cycle... in [1]. 6. References [1] Vasconcelos A. et All. “Sentinel-1A Reference Orbit Acquisition Manoeuvre Campaign.... [2] Martin Serrano, M. A, Marc, X and Shurmer, I. “Sentinel-1: Operational approach to the orbit...