Correction of the Sea State Impact in the L-Band Brightness Temperature by Means of Delay-Doppler Maps of Global Navigation Satellite Signals Reflected Over the Sea Surface
- 3 October 2008
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Geoscience and Remote Sensing
- Vol. 46 (10) , 2914-2923
Abstract
This paper presents an efficient procedure based on 2-D convolutions to obtain delay-Doppler maps (DDMs) of Global Navigation Satellite Signals reflected (GNSS-R) over the sea surface and collected by a spaceborne receiver. Two DDM-derived observables (area and volume) are proposed to link the sea-state-induced brightness temperature to the measured normalized DDM. Finally, the requirements to use Global Positioning System reflectometry to accurately correct for the sea state impact on the L-band brightness temperature (quantization levels, decimation, truncation, and noise impact) are analyzed in view of its implementation in the Passive Advanced Unit instrument of the Spanish Earth Observation Satellite (SeoSAT/INGENIO) project.Keywords
This publication has 25 references indexed in Scilit:
- New Instrument Concepts for Ocean Sensing: Analysis of the PAU-RadiometerIEEE Transactions on Geoscience and Remote Sensing, 2007
- Potential Synergetic Use of GNSS-R Signals to Improve the Sea-State Correction in the Sea Surface Salinity Estimation: Application to the SMOS MissionIEEE Transactions on Geoscience and Remote Sensing, 2007
- Detection and Processing of bistatically reflected GPS signals from low Earth orbit for the purpose of ocean remote sensingIEEE Transactions on Geoscience and Remote Sensing, 2005
- Stochastic voltage model and experimental measurement of ocean-scattered GPS signal statisticsIEEE Transactions on Geoscience and Remote Sensing, 2004
- Sea surface salinity from space: Science goals and measurement approachRadio Science, 2003
- GPS signal scattering from land for moisture content determination2002
- Sea ice remote sensing using surface reflected GPS signals2002
- 5‐cm‐Precision aircraft ocean altimetry using GPS reflectionsGeophysical Research Letters, 2002
- First spaceborne observation of an Earth‐reflected GPS signalRadio Science, 2002
- Fundamentals of Global Positioning System Receivers2000