摘要
本文综述了电离层、对流层中电波折射引起的射电天文观测及卫星测地中的各种误差及各种改正方法和它们的精度。 对流层影响的主要改正方法是实测大气温度、压力等参数,用数学模型计算。电离层影响的改正目前有三种方法:一是实时测量电离层主要参数——电子总含量的变化,然后用数学模型方法改正。二是采用双频同时观测的手段来消除电离层折射的影响。三是采用自校准方法。文中还比较了两种不同的自校准方法——常规自校准方法和多余量自校准方法。
Radio waves propagating through the ionosphere and troposphere suffer refraction effects. Several correction procedures are used in radio astronomy and satellite geodesy to remove refraction effects as much as possible. Instrumental limitations and the limited accuracy of available atmospheric parameters restrict useful application of several correction methods. The limitations of some methods are indicated and prospects for improvement are indicated. Special attention is paid to 'self-calibration' techniques.
关键词
射电天文法
卫星
测地
改正
精度
Radio astronomy method-Refraction correction
