The Soil Moisture Active Passive Validation Experiment 2012 (SMAPVEX12): Prelaunch Calibration and Validation of the SMAP Soil Moisture Algorithms

被引：218

作者：

McNairn, Heather ^{[1
]}

Jackson, Thomas J. ^{[2
]}

Wiseman, Grant ^{[3
]}

Belair, Stephane ^{[4
]}

Berg, Aaron ^{[5
]}

Bullock, Paul ^{[6
]}

Colliander, Andreas ^{[7
]}

Cosh, Michael H. ^{[2
]}

Kim, Seung-Bum ^{[7
]}

Magagi, Ramata ^{[8
]}

Moghaddam, Mahta ^{[9
]}

Njoku, Eni G. ^{[7
]}

Adams, Justin R. ^{[5
]}

Homayouni, Saeid ^{[10
]}

Ojo, Emmanuel RoTimi ^{[6
]}

Rowlandson, Tracy L. ^{[5
]}

Shang, Jiali ^{[1
]}

Goita, Kalifa ^{[8
]}

Hosseini, Mehdi ^{[1
,8
]}

机构：

[1] Agr & Agri Food Canada, Sci & Technol Branch, Ottawa, ON K1A 0C6, Canada

[2] USDA ARS, Hydrol & Remote Sensing Lab, Beltsville, MD 20705 USA

[3] Stantec, Winnipeg, MB R3C 3R6, Canada

[4] Environm Canada, Meteorol Res Branch, Dorval, PQ H9P 1J3, Canada

[5] Univ Guelph, Dept Geog, Guelph, ON N1G 2W1, Canada

[6] Univ Manitoba, Dept Soil Sci, Winnipeg, MB R3T 2N2, Canada

[7] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[8] Univ Sherbrooke, Dept Geomat Appl, Sherbrooke, PQ J1K 2R1, Canada

[9] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

[10] Univ Ottawa, Dept Geog, Ottawa, ON K1N 6N5, Canada

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2015年 / 53卷 / 05期

关键词：

Passive microwave; soil moisture; Soil Moisture Active Passive (SMAP); synthetic aperture radar; L-BAND; RADAR OBSERVATIONS; SAR DATA; RETRIEVAL; ROUGHNESS; SENSOR; BACKSCATTERING; RADIOMETER; PROBE;

D O I：

10.1109/TGRS.2014.2364913

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The National Aeronautics and Space Administration (NASA) Soil Moisture Active Passive (SMAP) satellite is scheduled for launch in January 2015. In order to develop robust soil moisture retrieval algorithms that fully exploit the unique capabilities of SMAP, algorithm developers had identified a need for long-duration combined active and passive L-band microwave observations. In response to this need, a joint Canada-U.S. field experiment (SMAPVEX12) was conducted in Manitoba (Canada) over a six-week period in 2012. Several times per week, NASA flew two aircraft carrying instruments that could simulate the observations the SMAP satellite would provide. Ground crews collected soil moisture data, crop measurements, and biomass samples in support of this campaign. The objective of SMAPVEX12 was to support the development, enhancement, and testing of SMAP soil moisture retrieval algorithms. This paper details the airborne and field data collection as well as data calibration and analysis. Early results from the SMAP active radar retrieval methods are presented and demonstrate that relative and absolute soil moisture can be delivered by this approach. Passive active L-band sensor (PALS) antenna temperatures and reflectivity, as well as backscatter, closely follow dry down and wetting events observed during SMAPVEX12. The SMAPVEX12 experiment was highly successful in achieving its objectives and provides a unique and valuable data set that will advance algorithm development.

引用

页码：2784 / 2801

页数：18

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