Estimation of Sea Surface Roughness Effects in Microwave Radiometric Measurements of Salinity Using Reflected Global Navigation Satellite System Signals
| Autor: | James L. Garrison, Alexander Fore, Simon Yueh, Jennifer S. Haase, Michael S. Grant, Justin K. Voo |
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| Rok vydání: | 2011 |
| Předmět: |
Radiometer
Meteorology business.industry Ocean chemistry Scatterometer Geotechnical Engineering and Engineering Geology GPS signals Sea surface temperature Brightness temperature Global Positioning System Surface roughness Environmental science Electrical and Electronic Engineering business Remote sensing |
| Zdroj: | IEEE Geoscience and Remote Sensing Letters. 8:1170-1174 |
| ISSN: | 1558-0571 1545-598X |
| DOI: | 10.1109/lgrs.2011.2159323 |
| Popis: | In February-March 2009, an airborne field campaign was conducted using the Passive Active L- and S-band (PALS) microwave sensor and the Ku-band Polarimetric Scatterometer to collect measurements of brightness temperature and near-surface wind speeds. Flights were conducted over a region of expected high-speed winds in the Atlantic Ocean, for the purposes of algorithm development for sea surface salinity (SSS) retrievals. Wind speeds encountered during the March 2, 2009, flight ranged from 5 to 25 m/s. The Global Positioning System (GPS) delay mapping receiver from the National Aeronautics and Space Administration (NASA) Langley Research Center was also flown to collect GPS signals reflected from the ocean surface and generate postcorrelation power-versus-delay measurements. These data were used to estimate ocean surface roughness. These estimates were found to be strongly correlated with PALS-measured brightness temperature. Initial results suggest that reflected GPS measurements made using small low-power instruments can be used to correct the roughness effects in radiometer brightness temperature measurements to retrieve accurate SSS. |
| Databáze: | OpenAIRE |
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