本文通过对75个地面测站的地理位置、地形及几种气象要素的分析，找出了这些气象要素的日变化和季节变化规律。
This paper presents diurnal and seasonal variations of several meteorological elements in the tropics by examining local geographic circumstance and observation reports in 75 surface stations.
基于地球同步卫星定位原理，分析了当利用数字化地形图提供测站高程时测站的多解和无解现象。
According to the Earth synchronous satellite positioning principle, multi-results and non-results are analyzed when the station height is given using DEM.
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