Comparison of Airborne Passive and Active L-Band System (PALS) Brightness Temperature Measurements to SMOS Observations During the SMAP Validation Experiment 2012 (SMAPVEX12)
Autor: | Thomas J. Jackson, Barron Latham, Ian O'Dwyer, Andreas Colliander, Steve Dinardo, Seth Chazanoff, Eni G. Njoku, Simon Yueh, William Chun, Heather McNairn |
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Rok vydání: | 2015 |
Předmět: | |
Zdroj: | IEEE Geoscience and Remote Sensing Letters. 12:801-805 |
ISSN: | 1558-0571 1545-598X |
Popis: | In this letter, it is shown that spaceborne observations made by the European Space Agency's Soil Moisture and Ocean Salinity (SMOS) satellite agreed closely with the Passive Active L-band System (PALS) brightness temperature acquisitions during the Soil Moisture Active Passive (SMAP) Validation Experiment 2012. The difference between the SMOS and PALS measurements was less than 5 K and 6 K for vertical and horizontal polarizations, respectively, over the relatively homogeneous agricultural areas. These values are less than the SMOS subpixel variability determined from the PALS measurement. This result demonstrated that the measurements obtained in the experiment are scalable to spaceborne brightness temperature observations, are representative of the expected SMAP observations, and will be of value in the development of soil moisture algorithms for spaceborne missions. |
Databáze: | OpenAIRE |
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