Прибор. Windsat. [Редактировать]

5 частот, 22-канала MW радиометр.

Центральная частота, ГГц Диапазон, МГц Поляризация (*) NEΔT IFOV Точка
6.8 125 V, H 0.48 K 39x71 км 25.0x12.5 км
10.7 300 V, H, P, M, L, R 0.37 K 25x38 км 25.0x12.5 км
18.7 750 V, H, P, M, L, R 0.39 K 15x24 км 12.5x12.5 км
23.8 500 V, H 0.55 K 20x30 км 12.5x12.5 км
37.0 2000 V, H, P, M, L, R 0.45 K 8x13 км 6.25x12.5 км

(*)   Поляризация: H = горизонатльно, V = вертикально, P = + 45°, M = - 45°, L = левокруговой, R = правокруговой

Технические характеристики

#ХарактеристикаЗначение
1Масса, кг.307
2Мощность, Вт311
3РазрешениеИзменяет чатсоту, совместимый с диаметром антенн 1.83 м
4Тип прибораРадиометер
5Целевое назначениеДемонстратор возможности измерения скорости ветра над океанами при помощи пассивных средств измерения
6Тип сканераКонический: 50-55° от угла зенита, ряд 1000 км – Вращение сканера: 31.6 скан/минуту = 12.5 км/скан
7Скорость работы, кбит в секунду256

Найдено 591 документов по запросу «Windsat». [Перейти к поиску]


Дата загрузки: 2017-11-08
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0.03/5
...-7 K. [3] Soil Moisture Retrievals From the WindSat Spaceborne Polarimetric Microwave Radiometer. An... observations is applied to the WindSat multifrequency polarimetric microwave radiometer. The... from the WindSat and AMSR-E radiometers were compared, and the WindSat observations... to the overpass times of WindSat. Statistical analysis with both satelliteobserved...-E after the adjustment of the WindSat brightness temperature observations. The average... demonstrate that soil moisture from WindSat is consistent with existing soil... in good agreement with global WindSat measurements obtained over a broad range... method is demonstrated using the WindSat radiometer. Calibration errors are found...-Reflected Radio-Frequency Interference Using WindSat Retrieval Chi-Square Probability. Ocean... produce uncontaminated ocean retrievals. [170] WindSat Global Soil Moisture Retrieval and... estimation and uses dual-polarization WindSat passive microwave data at 10... patterns. The comparisons between the WindSat vegetation retrievals and the AVHRR... published literature and the spaceborne WindSat radiometer measurements were used. [235... with coefficients determined from the WindSat data. Because the vertically polarized... the conical scanning geometry of WindSat. A comparison and evaluation of these...] WindSat Passive Microwave Polarimetric Signatures of the Greenland Ice Sheet. WindSat has... full polarimetric signatures obtained from WindSat over Greenland, and use a simple... Surface Passive Polarimetry With the WindSat Instrument. WindSat provides an opportunity to..., rangeland, desert, and agricultural conditions. WindSat observations at horizontal and vertical... above 2 ms-1. Measurements from the WindSat five frequency polarimetric radiometer are..., and this also confirms that WindSat measurement and radiative transfer model... approach to WindSat ocean surface wind vector retrieval. WindSat is the first... observations of reproducible breaking waves. WindSat, the first satellite polarimetric microwave... of WindSat wind vector performance with respect to QuikSCAT estimates. The WindSat... compare temporally and spatially coincident WindSat and QuikSCAT wind vector measurements... the design goals of the WindSat instrument, taking into consideration expected...] A nonlinear optimization algorithm for WindSat wind vector retrievals. WindSat is a space-based... ocean surface wind vector from WindSat measurements. The algorithm uses a physically... forward model function for the WindSat brightness temperatures. Empirical corrections to... using a six-month dataset of WindSat measurements and collocated data from...] WindSat on-orbit warm load calibration. Postlaunch calibration of the WindSat polarimetric... thermal modeling predictions of the WindSat on-orbit performance are presented... the WindSat sensor. Geolocation and pointing accuracy analyses of the WindSat flight... and will be addressed together. WindSat has no unusual geolocation requirements... РЕФЕРАТЫ ЖУРНАЛЬНЫХ СТАТЕЙ Comparison of WindSat brightness temperatures with two-scale... preliminary comparisons are made with WindSat observations at 10.7, 18.7, and... polarization agree quite well with WindSat observations over this range of... the continental united states using WindSat radiometry. Transmissions from ground-based... C-and X-band channels of the WindSat microwave radiometer. Our findings are... further understand their properties. [580] WindSat radio-frequency interference signature and... spaceborne multichannel radiometer data of WindSat and the Advanced Microwave Scanning... paper, we first analyzed multivariate WindSat and Scanning Multichannel Microwave Radiometer... to affect performance. [785] The WindSat spaceborne polarimetric microwave radiometer: sensor..., underway replenishment, and littoral operations. WindSat is a satellitebased multifrequency polarimetric microwave... circular sun-synchronous orbit. The WindSat payload is performing well and... R.M. Soil Moisture Retrievals From the WindSat Spaceborne Polarimetric Microwave Radiometer. / Parinussa...-Reflected Radio-Frequency Interference Using WindSat Retrieval Chi-Square Probability. / Adams.... 2666 - 2674 реферат 425. Li L. WindSat Passive Microwave Polarimetric Signatures of... Surface Passive Polarimetry With the WindSat Instrument. / Narvekar P.S., Jackson T.J., Bindlish R., Li... 566. Smith C.K. A statistical approach to WindSat ocean surface wind vector retrieval... реферат 575. Monaldo F.M. Evaluation of WindSat wind vector performance with respect.... Bettenhausen M.H. A nonlinear optimization algorithm for WindSat wind vector retrievals. / Bettenhausen M.H., Smith... pointing accuracy analysis for the WindSat sensor. / Purdy W.E., Gaiser P.W., Poe G.A., Uliana... реферат 579. Lyzenga D.R. Comparison of WindSat brightness temperatures with two-scale... the continental united states using WindSat radiometry. / Ellingson S.W., Johnson J.T. // IEEE Transactions... РЕФЕРАТЫ ЖУРНАЛЬНЫХ СТАТЕЙ 581. Li L. WindSat radio-frequency interference signature and... - 2795 реферат 786. Gaiser P.W. The WindSat spaceborne polarimetric microwave radiometer: sensor...



Дата загрузки: 2017-06-14
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0.14/5
... model function was developed using WindSat winds as a calibration truth. An... mission, from 1999 to 2009. WindSat (purple) is a currently operational polarimetric... scatterometers, a new type of radiometer, WindSat, was launched in 2003 that... a linearly polarized channel at 6.8 GHz), WindSat has been very successful in... wind speed. The scatterometers and WindSat instruments will soon provide 25... improving the wind retrievals. Using WindSat as a calibration target, we are... decade-long and still operating WindSat instrument also provides a valuable opportunity... WindSat polarometric radiometer, available since 2003. An all-weather algorithm for WindSat.... 1998). We have confidence using WindSat for reliable high wind truth... based emissivity model used in WindSat processing is linear for wind...-2011 is represented by these WindSat wind speeds developed at RSS... RSS WindSat allweather wind speed retrievals (http://www.remss.com/ windsat) as calibration truth. The choice of WindSat as calibration was motivated by 1) the WindSat mission overlaps... as a common calibration for these; 2) WindSat has reliable winds at all...); 3) WindSat can measure winds also in rainy and storm conditions; 4) WindSat also...; 5) WindSat hurricane winds had been validated versus HRD H*Wind; and 6) WindSat data... backscatter cross-section s0 with WindSat wind speeds, using a time window...(w), we binned all the QuikSCAT–WindSat collocations in a two-dimensional histogram... collocated wind speeds from either WindSat (black) or buoys (red). This... wind speeds and when using WindSat winds. These lines display which... m s21, using either buoys or WindSat for training the GMF does... WindSat binned s0 overlap; therefore, we are confident we can use WindSat... lower than 15 m s21 and WindSat for higher winds. However, merging... for the scatterometer wind retrievals. WindSat wind directions are not sufficiently... the observed s0 binned using WindSat wind speed and CCMP wind... QuikSCAT winds match tightly collocated WindSat winds up to about 35..., CCMP, buoys, SSM/I V7, and WindSat. coefficients is how sensitive they...: NCEP, buoy, SSM/I, CCMP, and WindSat. There are noticeable differences for...) from the radiometers SSM/I, TMI, WindSat V7 (Wentz 2013), distributed online... PDFs versus buoys, NCEP GDAS, WindSat, CCMP, and SSM/I V7 winds... 5 years of wind retrievals where WindSat and SSM/I are collocated within.../I V6, AMSR-E, TMI V4, and WindSat), and wind vector ambiguities from... compared to NCEP (left) and WindSat (right). There are a few regions.... When QuikSCAT is compared to WindSat, these bias regions are not... WindSat in retrieving wind direction with the current algorithm used for WindSat... and aft) for much improved WindSat wind direction skill is under... validation data: NCEP GDAS, WindSat, buoys, CCMP, WindSat, and SSMI V7. Each... bias at selected wind speeds (m s–1). WindSat does not represent an independent... exercise to compare QuikSCAT and WindSat biases at regional scales. NCEP... (Meissner and Wentz 2002, 2012), WindSat has a lower sensitivity to wind... number of s0 collocations with WindSat winds decreases dramatically at both... shows Ku-2001 QuikSCAT and WindSat wind comparisons. In addition to... (red) or Ku2001 (purple), or WindSat (one-look algorithm) minus NCEP... on 5 years of QuikSCAT or WindSat data. An alternative indirect way... made by the SSM/I and WindSat radiometers. As a result, the Ku... QuikSCAT wind speed bias versus WindSat, as a function of rain rate... (dashed line) are consistent with WindSat. For QuikSCAT wind retrievals in... closest in time to the WindSat and QuikSCAT satellite overpasses are.... We resampled them to the WindSat footprint sampling size (50 km... the wind fields from the WindSat V7 all-weather algorithm and... shows the WindSat V7 rain rates. We see that the WindSat all...) are consistent with HRD and WindSat winds. However, the structure of..., (middle) QuikSCAT Ku2011, and (right) WindSat winds. Each color refers to... listed in each plot. The WindSat comparison is from Meissner and.... QuikSCAT minus WindSat wind speeds, stratified according to WindSat rain rates, for... collocated within 90 min with WindSat. 1842 JOURNAL OF ATMOSPHERIC AND... (top left) HRD, (top right) WindSat V7 all-weather winds, (bottom...-2011 winds, and (bottom right) WindSat rain rates. institutions that request.../I, SSMIS, AMSR-E, AMSR2, TMI, and WindSat. The Ku-2011 RSS QuikSCAT... Research Council 2004). By using WindSat as a calibration ground truth, the.... As QuikSCAT compares well with WindSat for the same time period... descending passes at the equator. WindSat LTAN is about the same.../I F13 (purple), WindSat (red), NCEP (black), and CCMP (cyan). WindSat retrievals used... Science Team, NASA Contract NNH10CD55C. WindSat data are produced by Remote... the insight and discussions on WindSat data; and Deborah Smith (RSS.... Gaiser, P. W., and Coauthors, 2004: The WindSat spaceborne polarimetric microwave radiometer: Sensor.... ——, and ——, 2006: Ocean retrievals for WindSat: Radiative transfer model, algorithm, validation...



Дата загрузки: 2017-09-24
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0.26/5
... 597 A Nonlinear Optimization Algorithm for WindSat Wind Vector Retrievals Michael H. Bettenhausen..., IEEE, and Stephen Cox Abstract—WindSat is a space-based polarimetric microwave... ocean surface wind vector from WindSat measurements. The algorithm uses a physically... forward model function for the WindSat brightness temperatures. Empirical corrections to... using a six-month dataset of WindSat measurements and collocated data from..., WindSat. I. INTRODUCTION T HE first space-based fully polarimetric microwave radiometer, WindSat [1], was launched in January 2003. WindSat’s primary mission... the ocean surface wind vector. WindSat also provides measure, columnar ments..., a fully polarimetric radiometer such as WindSat, which also measures and , provides... measurements for only one frequency. WindSat provides the first opportunity to... ocean surface wind vectors from WindSat measurements [13]. Here 2Throughout this... optimization algorithm which simultaand from WindSat s. The neously retrieves algorithm is... (ambiguities) for each set of WindSat s using a physically based forward model... satisfied: II. WINDSAT DATA DESCRIPTION A description of the WindSat sensor and data... common measurements available for all WindSat frequencies (except 6.8 GHz due to... produced with version 1.8.1 of the WindSat ground data processing system. We... al.: NONLINEAR OPTIMIZATION ALGORITHM FOR WINDSAT 599 The matrix , called the... our forward model for the WindSat s. We have developed a parameterized forward... al.: NONLINEAR OPTIMIZATION ALGORITHM FOR WINDSAT radiation and the direct emission... THE ATMOSPHERIC PARAMETERS AT EACH WINDSAT FREQUENCY (7) (8) where refers to the... isotropic atmosphere approximation because the WindSat frequency band set does not... clouds. For nonprecipitating clouds at WindSat frequencies, scattering from cloud liquid... for the [24]. The individual WindSat frequencies. The hydrodynamic modulation term... al.: NONLINEAR OPTIMIZATION ALGORITHM FOR WINDSAT 603 The two-scale model... retrieval performance by comparing our WindSat retrievals with NCEP for , QuikSCAT... WindSat measurements from the six-month dataset. Fig. 2. Difference between the WindSat... vapor. Fig. 3. Histograms of the WindSat and SSM/I water vapor retrievals.... The overall differences between our WindSat water vapor retrievals and the... difference in millimeters between the WindSat and SSM/I water vapor retrievals... difference in millimeters between the WindSat and SSM/I cloud liquid water... collocations. Fig. 6. Difference between the WindSat versus NCEP T . T retrievals and NCEP... to collocation differences. However, the WindSat and SSM/I retrievals are in... interpolated in space to the WindSat measurement location. The dataset includes... same Fig. 7. Difference between the WindSat versus NCEP wind speed. T retrievals... OPTIMIZATION ALGORITHM FOR WINDSAT Fig. 9. Bias difference between the WindSat T retrievals and NCEP T versus NCEP wind direction relative to the WindSat... one hour of the WindSat measurements to evaluate WindSat wind vector retrieval... nudging. The difference between the WindSat and QuikSCAT wind direction histograms... WindSat retrievals are less accurate. Fig. 12 shows the difference between WindSat... wind Fig. 12. Difference between WindSat and QuikSCAT retrieved wind speeds.... 3, MARCH 2006 TABLE V DIFFERENCE BETWEEN WINDSAT AND QUIKSCAT WIND DIRECTION RETRIEVALS... Fig. 13. RMS difference between WindSat and QuikSCAT wind direction retrievals... bins. The RMS differences between WindSat and QuikSCAT retrieved wind directions... al.: NONLINEAR OPTIMIZATION ALGORITHM FOR WINDSAT Fig. 15. Ambiguity selection skill... the retrieved wind direction from WindSat versus the QuikSCAT wind direction... of WindSat versus QuikSCAT wind direction relative to the WindSat look direction... radiometers. The comparisons of our WindSat retrievals to QuikSCAT retrievals verify... improved. The RMS difference between WindSat and QuikSCAT wind speed retrievals... factors. The largest concentration of WindSat-QuikSCAT matchups is in the... al.: NONLINEAR OPTIMIZATION ALGORITHM FOR WINDSAT trievals. The square root of... of the differences between our WindSat retrievals and collocated data from... for differences between the closest WindSat ambiguity and the QuikSCAT wind... the WindSat s. We continue to improve our forward model function and WindSat..., L. Choy, R. M. Bevilacqua, and P. S. Chang, “The WindSat spaceborne polarimetric microwave radiometer: Sensor..., and P. W. Gaiser, “A statistical approach to WindSat ocean surface wind vector retrievals...] L. Li, P. W. Gaiser, M. Bettenhausen, and W. Johnston, “WindSat radio-frequency interference signature and... B. A. Vanhoff, “The accuracy of preliminary WindSat vector wind measurements: Comparisons with... and retrieval algorithms for the WindSat polarimetric microwave radiometer. Craig K. Smith... the Principal Investigator for the WindSat spaceborne polarimetric microwave radiometer demonstration... analysis and software development for WindSat ocean wind retrievals at the...



Дата загрузки: 2017-04-09
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0.15/5
... Scanning Radiometer-EOS (AMSR-E) and WindSat have been used to retrieve... microwave frequencies. While AMSR-E and WindSat lack an L-band channel, they...-band observations allows AMSR-E and WindSat to obtain coincident surface temperature... output on the accuracy of WindSat and AMSR-E based surface soil... for soil moisture retrievals. The WindSat polarimetric radiometer on board of... the reduced temporal frequency of WindSat at a fixed point on the... soil moisture from AMSR-E and WindSat observations exist (e.g. Jackson et al... retrievals from the AMSR-E and WindSat sensor have been extensively validated... subsequent LPRM-based AMSR-E and WindSat soil moisture retrievals. The use... (2006). The design of the WindSat radiometer, on board the Coriolis... the LPRM retrieval algorithm. The WindSat satellite orbits the Earth at... detailed information on the Coriolis WindSat sensor readers are directed to... AMSR-E and WindSat is the reduced temporal frequency of WindSat observations as... motivate the use of both WindSat and AMSR-E retrievals in this... 06:00 a.m./p.m. overpass time of WindSat matches SMOS and SMAP. This... the reduced temporal frequency of WindSat observations may introduce higher levels... the two radiometers (AMSR-E and WindSat) identical. The spatial resolution of... brightness temperatures from AMSR-E and WindSat were re-sampled to daily... 2. Specifications of the AMSR-E and WindSat microwave sensors used in the... moisture retrieval algorithm. 3 3.1 Parameter AMSR-E WindSat Frequency (GHz) Bandwidth (GHz) Altitude... verification techniques to AMSR-E and WindSat surface soil moisture retrievals generated... vertically homogeneous at the Coriolis/WindSat overpass time (06:00 a.m./p.m. local... a range of LPRM AMSR-E and WindSat-based soil moisture products. These.... For both satellites (AMSR-E and WindSat) in both day- (ascending) and... overpass times of AMSR-E and WindSat. Each graph shows the average... overpassKatimes of AMSR-E and algorithm. 4 WindSat. Each graph shows the average... on AMSR-E (01:30 a.m./p.m.) and WindSat (06:00 a.m./p.m.). The results are... lower spatial support of the WindSat sensor does not influence the..., but these are generally small (e.g. WindSat Ascending, class 2; AMSR-E Descending, class... larger for AMSR-E than for WindSat. This suggests that 01:30...-analysis LST than 06:00 a.m./p.m. (i.e. WindSat) observations. Secondly, the impact of... AMSR-E night-time (descending) and WindSat (both paths) a 1/2 h phase shift in... to re-analysis LST than WindSat (06:00 a.m./p.m.) observations. This is... a.m./p.m.) as the WindSat satellite. The transition from C-band WindSat and AMSR-E results... surface soil moisture retrievals. However, WindSat and AMSR-E retain the advantage..., J., Choy, L., Bevilacqua, R., and Chang, P.: The WindSat Spaceborne Polarimetric Microwave Radiometer: Sensor..., T., Njoku, E., Rudiger, C., Calvet, J., and Bindlish, R.: WindSat Global Soil Moisture Retrieval and..., R.: Soil moisture retrievals from the WindSat spaceborne polarimetric microwave radiometer, IEEE...



Дата загрузки: 2017-04-08
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0.19/5
... 15 m/s with respect to QuikSCAT, WindSat, and Step Frequency Microwave Radiometer... CMOD5.h using collocated QuikSCAT and WindSat wind speed retrievals, GPS dropsondes... Wind Validation with QuikSCAT and WindSat It is very difficult to... instruments (such as QuikSCAT and WindSat), provided that their performance in...-GDAS comparisons (Fig. 2). 3) ASCAT WindSat Comparisons: WindSat is the first spaceborne fully... from space using such a sensor. WindSat was launched on the Coriolis... the WindSat instrument [30]. The high-windspeed validation of the RSS WindSat... at least 35 m/s [31]. The WindSat 25-km gridded maps for... curves represent the CMOD5.n. The WindSat and ASCAT measurements for the.... Due to differences in the WindSat and ASCAT orbits, the time... was utilized. Results from the WindSat–ASCAT validations (not shown here... statistical results with QuikSCAT and WindSat are consistent with the operational... and WindSat Winds The comparisons of ASCAT with QuikSCAT and WindSat were... B2 (dash-dot). QuikSCAT or WindSat products and that the average... respect to the QuikSCAT and WindSat wind data. As expected, the... with QuikSCAT (first column) and WindSat (second column). The contours represent.... The composites of RSS QuikSCAT, WindSat, and ASCAT wind speeds were... average wind speed field from WindSat wind vector retrievals was found... data from research (QuikSCAT and WindSat) and operational (ASCAT) satellite systems... collocated three QuikSCAT and RSS WindSat wind products. Overall, the negative... standard ASCAT and QuikSCAT and WindSat winds was reduced for all...



Дата загрузки: 2017-04-09
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0.34/5
... satellite which includes the Navy WindSat and Air Force SMEI (Solar... wind, sea ice, and precipitation. WindSat is a partnered program that meets... services' unique sensor development efforts (WindSat and Advanced Altimeters) and Navy... of the Fleet operational requirements. WindSat, an initiative begun in 1997... Support (Space) (U) B. Accomplishments/Planned Program WINDSAT Accomplishments/Effort/Subtotal Cost RDT...: Supported WindSat wind speed and direction algorithm development. Supported WindSat on-orbit... Satellite and monitor health of WindSat on-orbit payload that provides... Windsat data stream. Control Coriolis Satellite and monitor health of the WindSat... Windsat data stream. Control Coriolis Satellite and monitor health of the WindSat... Imager Sounder (SSM/IS) and WindSat sensor. Conducted field experiments with... (SSM/IS) sensors, and the WindSat sensor. FY05 Plans: Prepare and... the DMSP SSM/IS and WindSat sensor. Use Airborne Polarmetric Microwave... Imager Sounder (SSM/IS) and WindSat sensor. FY07 Plans: Prepare for... Imager Sounder (SSM/IS) and WindSat sensor performance. Continue calibration and... (SSM/IS) sensors and the WindSat Sensor. R-1 SHOPPING LIST - Item No... acquisition or ensure threshold accomplishment. WindSat provides risk reduction data and... 7.385 Continuing Subtotal Product Development Windsat Cal Val & Operational Data/Coriolis... FLEET EXTENDED SUPPORT TO FLEET WindSat / Coriolis Special Sensor Microwave Image... ACTIVITY RDT&E, BA-7 N / Schedule Profile WindSat /Coriolis Testing Complete Launch Calibration...



Дата загрузки: 2017-06-15
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0.2/5
... WindSat 3 7 RSS TMI11GHz 3 4 RSS AMSR-E 3 7 RSS TMI37GHz 3 4 RSS WindSat LF 3 7 RSS WindSat MF 3 7 RSS WindSat AW 3 AMSR-E LF... more remarkable than that by WindSat. TMI WindSat Equatorial Crossing Times Satellite... F17/SSMI TRMM/TMI Coriolis/WindSat Ascending Descending 13:30 01... see diurnal heating effect in WindSat data, because the observation time... [m/s] RMSE [m/s] Correlation number AMSR2 TMI WindSat 0.230 0.488 0.846 1263 0.193... WindSat LF 0.144 0.829 0.936 1035 WindSat MF -0.004 0.825 0.935 1067 Windsat...: 36 GHz, WindSat LF:10.7GHz, WindSat MF: 18.7 GHz, Windsat AW: all... 0.062 0.923 0.932 1239 WindSat LF WindSat MF Windsat AW 0.144 -0.004 0.398...: 36 GHz, WindSat LF:10.7GHz, WindSat MF: 18.7 GHz, Windsat AW: all... 0.25° ASCAT L3 data 0.25° WindSat (*all-weather surface wind) 0.25... to present radiometer 5-Feb-2003 WindSat to present Organization JAXA RSS...] Description of WindSat Data Products http://www.ssmi.com/windsat/windsat_data_description.html... SSW products than0.998 0.2 m/sec WindSat +0.010 is less 0.687 56517842...



Дата загрузки: 2017-09-24
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0.12/5
.... 1, JANUARY 2006 A Statistical Approach to WindSat Ocean Surface Wind Vector Retrieval... W. Gaiser, Senior Member, IEEE Abstract—WindSat is the first space-based... retrieve ocean surface wind vectors. WindSat measures poin 16 “chanlarized radiometric.../right circular polarizations, respectively. The WindSat reflector antenna has an 11... radiometer can be found in [1]. WindSat provides risk reduction for the...: 1) obtain a quick initial assessment of WindSat’s wind vector measurement capabilities; 2) provide... platform for enhancements to the WindSat Temperature and Sensor Data Record... the lowest resolution (6.8 GHz), where WindSat the for all 16 channels... performed empirically, using collocations of WindSat with various sources of satellite... et al.: STATISTICAL APPROACH TO WINDSAT OCEAN SURFACE WIND VECTOR RETRIEVAL... of the form (1) is the WindSat brightness temperature for channel , except... AND TESTING Six months of WindSat version 1.6.1 Sensor Data Records (SDRs... dataset consists of collocations between Windsat SDRs, the QuikSCAT science product... the loSSM/I. GDAS 1 cation of Windsat measurements are used for SST... is a two-way collocation between WindSat and QuikSCAT. For both training...-type rain flagging adapted to WindSat frequencies [13]. Static, geographical masks... et al.: STATISTICAL APPROACH TO WINDSAT OCEAN SURFACE WIND VECTOR RETRIEVAL... RETRIEVAL ERRORS FOR REGRESSIONS Fig. 2. WindSat wind direction rms errors stratified... collocated QuikSCAT science product. Fig. 1. WindSat wind speed errors stratified by... developed a regression retrieval technique for WindSat retrieval of ocean surface wind... assessment of WindSat retrieval capabilities. Comparisons of the initial WindSat retrievals with..., L. Choy, R. M. Bevilacqua, and P. Chang, “The WindSat spaceborne polarimetric microwave radiometer: Sensor... pointing accuracy analysis for the WindSat sensor,” IEEE Trans. Geosci. Remote..., L. Jones, K. St. Germain, and G. Poe, “WindSat post-launch calibration,” in Proc... S. Cox, “A nonlinear optimization algorithm for WindSat wind vector retrievals,” IEEE Trans...



Дата загрузки: 2017-09-24
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0.39/5
11.4 Weather Forecasting Applications using WindSat Thomas Lee, James Goerss, Jeffrey... Zorana Jelenak NOAA-NESDIS 1. INTRODUCTION WindSat and QuikSCAT observations were compared... Atmospheric Prediction System (NOGAPS). The WindSat data were derived from an... directions and wind speeds for WindSat and QuikSCAT stratified by NAVDAS... baseline for this comparison of WindSat and QuikSCAT vectors. The 10m... For each analysis time, the WindSat and QuikSCAT observations within a two... the satellite retrieval location. Only WindSat and QuikSCAT cases of two... at the retrieval location. For WindSat and QuikSCAT the number of... million, respectively. 61.3% of the WindSat observations and 60.6% of the... are summarized in Fig. 1. The WindSat standard deviations for speed (top... for QuikSCAT are comparable to WindSat for wind speeds 7.5 m/s or higher... low wind speeds (0 to 7.5 m/s) the Windsat direction standard deviations are artificially... to specify ambiguities. In fact, WindSat direction retrievals have minimal accuracy... not be considered valid. Fig. 1 WindSat and QuikSCAT standard deviations, both... a Frontal System The version of WindSat retrievals shown in this section.... Fortunately, over most of the WindSat pass, the vectors (Fig. 2B... Microwave Imager (SSM/I), a predecessor to WindSat (Goodberlet et al. 1990). However.../I and WindSat Some of the most operationally useful features in WindSat vector... 25-50 km from shore, WindSat represents a major advance in the..., will be substantially greater than Windsat. Due to an extremely fast.... Fig. 2 A) Windsat Total Precipitable Water (kg/m2) 4 February 2004; B) WindSat wind vectors.../I wind speed 17 January 1999; B) WindSat wind vectors 18 February 2004..., 2006: A nonlinear optimization algorithm for WindSat wind vector retrievals, Submitted to... ocean wind vector retrievals from WindSat polarimetric measurements, in Proceedings of...



Дата загрузки: 2017-05-20
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0.19/5
... RADIO FREQUENCY INTERFERENCE FROM AMSR-E, WINDSAT AND SSM/I Darren McKague, John... to K-band observations from AMSR-E, WindSat and SSM/I. This algorithm uses... in SSM/I data than in WindSat or AMSR-E data, likely due... 2008 and 2009 AMSR-E and WindSat data that was not present... for K-band data from the WindSat, Special Sensor Microwave Imager (SSM... K-band channels for WindSat, AMSR-E, and SSM/I. Instrument WindSat Center Frequency (GHz... data from SSM/I, AMSR-E and WindSat from July 2005. Fig. 2 shows... RFI than either AMSR-E or WindSat data. This is likely due... a different center frequency. 3. AMSR-E and WindSat show more RFI in 2008... show up in AMSR-E and WindSat data in an arc peaking... AMSR-E than it is for WindSat (Figs. 2, 3). This could be due... WindSat pass-band. Tb Diff (K) Figure 1. K-band RFI for SSM/I (top), WindSat... – 18.7V Tb differences for WindSat and AMSR-E. RFI appears as... 3. K-band RFI for SSM/I (top), WindSat (middle) and AMSR-E (Bottom) for... 2. K-band RFI for SSM/I (top), WindSat (middle) and AMSR-E (bottom) for... at Kband for the AMSR-E, WindSat and SSM/I radiometers. The algorithm... than do the AMSR-E and WindSat bands centered at 18.7 GHz... northern US in AMSR-E and WindSat data has been traced to.... [3] Li, Li, P.W. Gaiser, and M. Bettenhausen, “WindSat radio-frequency interference signature and...