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在简要介绍星载微波辐射计周期定标技术基础上，着重分析了外部周期定标技术，采用天线方向图校正技术进行了误差分析，对“冷”、“热”定标源进行了计算，提出了提高星载微波辐射计定标精度的措施。
Based on the brief introduction of the periodic calibration technology of spaceborne microwave radiometer, the external periodic calibration technique was analyzed. The error analysis was carried out by using the antenna pattern correction technology, and the calculation of “cold” and “hot” calibration sources were carried out. The measures to improve the calibration precision of spaceborne microwave radiometer are put forward.