Sun effects in 2-D aperture synthesis radiometry imaging and their cancelation

被引：48
|
作者：
Camps, A [1 ]
Val-Ilossera, M
Duffo, N
Corbella, I
Torres, F
Barrena, V
机构：
[1] Univ Politecn Cataluna, Dept Signal Theory & Commun, E-08034 Barcelona, Spain
[2] GMV SA, E-28760 Madrid, Spain
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2004年 / 42卷 / 06期
关键词：
antenna arrays; imaging; interferometry; radiometry;
D O I：
10.1109/TGRS.2004.826561
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The Microwave Imaging Radiometer by Aperture Synthesis (MIRAS) is the single payload of the European Space Agency's (ESA) Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Opportunity mission. MIRAS will be the first two-dimensional aperture synthesis radiometer for earth observation. Two-dimensional aperture synthesis radiometers can generate brightness temperature images by a Fourier synthesis process without mechanical antenna steering. To do so and have the necessary wide swath for earth observation, the array is formed by small and low directive antennas, which do not attenuate enough bright noise sources that may interfere with the measurements. This study analyzes the impact of the radio-frequency emission from the sun in the SMOS mission, reviews the basic image reconstruction algorithms, and proposes a technique to minimize sun effects.
引用
收藏
页码：1161 / 1167
页数：7
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