海洋二号（HY-2A）卫星大气校正微波辐射计（ACMR）是为雷达高度计提供大气路径延迟校正的微波辐射计。本文针对ACMR热真空定标试验的原理、方法、实施过程及试验结果进行了阐述和分析，得到了ACMR 3个频率的辐射传输系数和非线性系数，并进行了天线订正的发射前算法分析，给出了天线温度系数。利用这些系数对在轨数据进行了处理，得到了在轨天线温度转换系数，并与Jason-1、Jason-2卫星上搭载的微波辐射仪（JMR）进行了匹配比较，结果表明一致性良好。%Atmospheric correction microwave radiometer(ACMR)is one of the main payloads for cor-recting atmospheric path delay of radar altimeter on HY-2A satellite. After discussion and analysis on thermal vacuum calibration method of ACMR,microwave transfer functions and related coefficients were given,espe-cially nonlinear coefficients derived from the test for correcting nonlinear responds between the input of antenna temperature and the output of voltage at each channel of ACMR. Meanwhile,antenna pattern correction algo-rithms for removing the effects of side-lobe and cross-polarization were derived and their coefficients were used for in-orbit data processing. The calibrated antenna temperatures were compared with the similar space-borne mi-crowave radiometer on Jason-1 and Jason-2 satellite(JMR),launched by the NASA-French Space Agency Ocean Surface Topography Mission. The results of comparison showed that the data from ACMR were well matched to those from Jason-1 and Jason-2.
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