Relationships of along-the-track local variations of GPS RO impact parameter to strong local vertical gradient of wet refractivity in the tropics

Atmospheric refractivity fields are more strongly affected by more water vapor in the tropical lower troposphere than elsewhere. In this study, based on model simulations, we first collocated the radio occultation (RO) data in 2009 from the Constellation

大气折射率场在热带对流层下层受更多水汽的影响比其他地方更强烈。在这项研究中，基于模型模拟，我们首先对2009年来自星座（此处可能指某卫星星座，需结合更多背景信息确定准确含义）的无线电掩星（RO）数据进行了配置。