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摘要

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引用本文:

DOI:

10.11834/jrs.20100412

收稿日期:

2009-07-03

修改日期:

2010-03-22

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利用卫星轨道资料获取降水云团尺度的新方案
中国科学技术大学 地球和空间科学学院, 大气探测与气候环境实验室 安徽 合肥 230026
摘要:

提出一种新的统计方案, 以目标面积比为核心度量指标, 并参照连续圆形目标定义目标面积比意义上的等效半径, 实现对目标宏观尺度大小的量化估计。此方法能有效减轻轨道截断效应所造成的目标尺度低估, 可对通过计数类方法得到的目标空间尺度做出有效修正。

Novel algorithm for retrieving spatial scale of precipitating clouds from low-orbiting satellite observations
Abstract:

A new scheme was proposed in this study to account for such a handicap, which is based on the statistics of object area fraction that is somewhat insensitive to the orbit truncation. In order to get a measurement that could be accurately received, continuous circle object was consulted. Accordingly the equivalent radius was finally defined by using a minimum deviation principle to indicate the object scale. Since the equivalent radius is an indirect indicator of object spatial scale, it could be used as a secondary strategy to modify the results from counting method, by which the underestimate would be restrained to some extent.

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