地基GPS遥感大气水汽总量中的“静力延迟”和“湿延迟”

The Concepts of Hydrostatic Delay and Wet Delay in Remote Sensing Water Vapor with Ground Based GPS Receivers

介绍了静力延迟和湿延迟概念的由来 ,推导了由对流层延迟计算水汽总量的一般公式 ;与李延兴等提出的新模型进行了对比 ,对其相应的观点提出讨论意见。认为国际上通用的AN模型比较严密地求解了对流层大气水汽总量 ,不存在与“真值”相比偏小的问题。

The concepts of Hydrostatic Delay and Wet Delay in remote sensing water vapor using ground based GPS receivers are reviewed. The common formula of calculating precipitable water from GPS troposphere delay is inferred based on the refractive index and air state equation expressions. The comparison between the common formula used in many international studies in the GPS remote sensing field and the new one inferred by Li Yanxing et al. shows that the old common formula is accurate and suitable to retrieve precise water vapor, and it is impossible to cause any big error in using this formula.