地基微波辐射计自定标的改进算法

doi:10.3969/j.issn.1001-2400.2014.04.014

Abstract

Abstract:

The calibration precision of the microwave radiometer affects the retrieval precision of atmosphere directly. Based on the self-calibration technology of the ground-based microwave radiometer in the American Atmospheric Radiation Measurement Program, this article deduces the general forms of self-calibration by the ground-based microwave radiometer. Due to the error of self-calibration during nonstratified atmosphere conditions, an improved method of self-calibration is proposed which searches for the best expiation error of different elevations after original self-calibration. The regression curve will approach the origin and the relative coefficient will approach 1. The measured brightness temperature of the dual-frequency microwave radiometer after self-calibration is compared with the brightness temperature simulated by the sounding data. The results show the validity of the improved self-calibration technology.

Key words: microwave radiometer, calibration, horizontally nonstratified, atmosphere, attenuation

LI Jiangman;GUO Lixin;LIN Leke;ZHAO Zhenwei;SHU Tingting;CHEN Houcai. Improved algorithm of self-calibration technology by the ground-based microwave radiometer[J].J4, 2014, 41(4): 77-81.

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Improved algorithm of self-calibration technology by the ground-based microwave radiometer

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