星载测云雷达定标技术

Calibration Technology of Spaceborne Cloud Radar

摘要:

星载测云雷达是一种定量主动微波遥感仪器。为了保障云雷达对云粒子反射率因子的高精度测量,从而精确地反演得到云的宏观和微观物理特性,需要对云雷达进行定标。本文简要介绍星载云雷达定标原理及方法,包括内定标及外定标方法,重点概括了现有国外星载云雷达定标技术发展现状,并提出有源外定标技术难点,为我国未来空间云测量雷达定标设计提供参考。

Abstract:

The spaceborne cloud radar is a quantitative active microwave remote sensing instrument. In order to ensure the high-precision measurement of the cloud particle reflectivity factor by the cloud radar, so as to accurately retrieve the macroscopic and microscopic physical characteristics of the cloud, it is necessary to calibrate the cloud radar. This article briefly introduces the principles and methods of spaceborne cloud radar calibration, including internal calibration and external calibration methods. It focuses on summarizing the current development status of the existing foreign satellite-borne cloud radar calibration technology, and proposes the technical difficulties of active external calibration,which can provide reference to Chinese space cloud measurement radar calibration design in future.