海潮对天顶延迟测定的影响  

Effect of Ocean Tide on the Determination of Zenith Delay

作　　者：王志强[1] 吴斌[1] 周旭华[1] 李军[1] 

机构地区：[1]中国科学院测量与地球物理研究所,武汉430077

出　　处：《天文学报》2003年第3期318-323,共6页Acta Astronomica Sinica

基　　金：国家自然科学基金(40074002;40274006);中科院重点项目(KJCX2-SW-T1);海洋"863"(2002AA639280)

摘　　要：GPS气象学是GPS应用的一个新领域,天顶延迟的精确测定是其中的一个关键。由于GPS测站的垂直位移与天顶延迟存在很强的相关性,所以海潮对精密测定天顶延迟的影响不可忽略。本文对中国地壳运动观测网络2001年第010天到040天的GPS数据进行了处理分析,结果显示这种影响大约在几毫米。以位于近海的上海测站和位于内陆的武汉测站为例,最大影响可达±7mm和±1mm。GPS/Meteorology is a new field in GPS applications, in which the precise determination of zenith delay is a key point. There is a strong correlation between the vertical displacement and the zenith delay at a GPS station, so the effect of ocean tide on the precise determination of zenith delay should not be neglectable. This paper processed and analyzed the GPS data of the Crustal Movement Observation Network of China from 10th to 40th in 2001, and the result shows that the effects are about several millimeters. For example, they are ±7 mm for the coastal station shanghai and ±1 mm for the inland station wuhan in maximum.

关 键 词：海潮 天顶延迟测定 天体测量学 GPS气象学 

分 类 号：P183.5[天文地球—天文学]