Impact and compensation of diffuse sun scattering in 2D aperture synthesis radiometers imagery

作者：Adriano Camps, M. Vall‐llossera, Nicolás Reul, F. Torres, N. Duffo, I. Corbella · 年份：2005 · DOI：10.1109/igarss.2005.1526774 · 被引用次数：11 · 研究领域：Soil Moisture and Remote Sensing、Radio Astronomy Observations and Technology、Synthetic Aperture Radar (SAR) Applications and Techniques

 The SMOS (Soil Moisture and Ocean Salinity) Mission was selected in May 1999 by the European Space Agency to provide global and frequent soil moisture and sea surface salinity maps. SMOS has a sun-synchronous polar dawn-dusk orbit and its single payload is MIRAS (Microwave Imaging Radiometer by Aperture Synthesis): a Lband 2D aperture synthesis interferometric radiometer. The array boresight is tilted 32.5o upwards in the orbital plane to maximize the angular excursion of the observed pixels. This study describes the practical implementation of the Sun effects (direct and diffuse scattering models) into the SMOS End-to-end Performance Simulator, a technique to cancel these effects in the brightness temperature image generated by the instrument, and the residual errors that can be expected.