Sensing atmospheric water vapor with the global positioning system
Sensing atmospheric water vapor with the global positioning system
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DOI：
10.1029/93gl02935
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发表时间：
1993-12
影响因子：
5.2
通讯作者：
C. Rocken;R. Ware;T. V. Hove;F. Solheim;C. Alber;James R. Johnson;M. Bevis;S. Businger
中科院分区：
文献类型：
--
作者：
C. Rocken;R. Ware;T. V. Hove;F. Solheim;C. Alber;James R. Johnson;M. Bevis;S. Businger
全球定位系统(GPS)接收器、水蒸气辐射计(WVRS)和地面气象设备在科罗拉多州50公里基线的两端运行，以测量GPS卫星视线内的可降水量(PWV)和湿延迟。使用高精度的轨道，WVR测量和GPS推断的两个部位之间的PWV差异通常优于1min。使用不太精确的在线广播轨道会使误差增加30%。数据模拟表明，如果基线超过500公里并使用最高精度的GPS轨道，GPS测量可以提供两个站点的ram级单独PWV估计，而不仅仅是它们的差异。
Global Positioning System (GPS) receivers, water vapor radiometers (WVRs), and surface meteorological equip- ment were operated at both ends of a 50-kin baseline in Colorado to measure the precipitable water vapor (PWV) and wet delay in the line-of-sight to GPS satellites. Using high pre- cision orbits, WVR-measured and GPS-inferred PWV differences between the two sites usually agreed to better than 1 min. Using less precise on-line broadcast orbits increased the discrepancy by 30%. Data simulations show that GPS mea- surements can provide ram-level separate PWV estimates for the two sites, as opposed to just their difference, if baselines exceed 500 km and the highest accuracy GPS orbits are used.