Academic Journal
The Soil Moisture Active Passive Experiments: Validation of the SMAP Products in Australia
| العنوان: | The Soil Moisture Active Passive Experiments: Validation of the SMAP Products in Australia |
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| المؤلفون: | Ye, Nan, Walker, Jeffrey P., Wu, Xiaoling, de Jeu, Richard, Gao, Ying, Jackson, Thomas J., Jonard, François, Kim, Edward, Merlin, Olivier, Pauwels, Valentijn R. N., Renzullo, Luigi J., Rudiger, Christoph, Sabaghy, Sabah, von Hebel, Christian, Yueh, Simon H., Zhu, Liujun |
| المساهمون: | UCL - SST/ELI/ELIE - Environmental Sciences |
| المصدر: | IEEE Transactions on Geoscience and Remote Sensing, Vol. 59, no.4, p. 2922-2939 (2021) |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE) |
| سنة النشر: | 2021 |
| المجموعة: | DIAL@USL-B (Université Saint-Louis, Bruxelles) |
| مصطلحات موضوعية: | Electrical and Electronic Engineering, General Earth and Planetary Sciences, Calibration and validation, Passive microwave remote sensing, radar remote sensing, soil moisture |
| الوصف: | The fourth and fifth Soil Moisture Active Passive Experiments (SMAPEx-4 and -5) were conducted at the beginning of the SMAP operational phase, May and September 2015, to: 1) evaluate the SMAP microwave observations and derived soil moisture (SM) products and 2) intercompare with the Soil Moisture and Ocean Salinity (SMOS) and Aquarius missions over the Murrumbidgee River Catchment in the southeast of Australia. Airborne radar and radiometer observations at the same microwave frequencies as SMAP were collected over SMAP footprints/grids concurrent with its overpass. In addition, intensive ground sampling of SM, vegetation water content, and surface roughness was carried out, primarily for validation of airborne SM retrieval over six ~ 3km × 3 km focus areas. In this study, the SMAPEx-4 and -5 data sets were used as independent reference for extensively evaluating the brightness temperature and SM products of SMAP, and intercompared with SMOS and Aquarius under a wide range of SM and vegetation conditions. Importantly, this is the only extensive airborne field campaign that collected data while the SMAP radar was still operational. The SMAP radar, radiometer, and derived SM showed a high agreement with the SMAPEx-4 and -5 data set, with a root-mean-squared error (RMSE) of ~ 3K for radiometer brightness temperature, and an RMSE of ~ 0.05 m3/m3 for the radiometer-only SM product. The SMAP radar backscatter had an RMSE of 3.4 dB, while the retrieved SM had an RMSE of 0.11 m3 /m3 when compared with the SMAPEx-4 data set. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0196-2892 1558-0644 |
| Relation: | boreal:244903; http://hdl.handle.net/2078.1/244903; urn:ISSN:0196-2892; urn:EISSN:1558-0644 |
| DOI: | 10.1109/tgrs.2020.3007371 |
| الاتاحة: | http://hdl.handle.net/2078.1/244903 https://doi.org/10.1109/tgrs.2020.3007371 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.A30631BC |
| قاعدة البيانات: | BASE |
| تدمد: | 01962892 15580644 |
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| DOI: | 10.1109/tgrs.2020.3007371 |