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| Development and Experimental Study on L-band Synthetic Aperture Radiometer Prototype for Ocean Salinity Measurement |
| NIU Lijie①② LIU Hao① WU Lin① ZHANG Cheng① ZHAO Xin① WU Ji① YIN Xiaobin① |
①(Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China)
②(University of Chinese Academy of Sciences, Beijing 100049, China) |
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Abstract Microwave Imager Combined Active and Passive (MICAP) is a new ocean salinity measure. The imager is composed of L, C, and K band radiometers and an L band scattermeter. The L band one dimensional synthetic aperture radiometer is a key part of MICAP, which is used to realize the high precision measurement of the ocean salinity. In order to demonstrate the concept and performance of MICAP, a ground-based prototype is developed and experiments are carried out. This paper introduces the development and experimental results of the L band synthetic aperture radiometer in the MICAP prototype. For the first time, a method is proposed to correct the AD offset error of digital to analog correlation conversion by using the three level quantization means. These experimental studies provide technical preparation for both the future Chinese ocean salinity mission and the global water cycle observation mission.
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Received: 14 November 2016
Published: 02 May 2017
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Corresponding Authors:
LIU Hao
E-mail: liuhao@mirslab.cn
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