9Askne J,Nordius H.Estimation of tropospheric delay for microwaves from surface weather data[J].Radio Sci,1987,22(3):379-386.
10Niell A E,Coster A J,solheim F S,et al.Comparison of measurements of atmospheric wet delay by radiosonde,water vapor radiometer,GPS and VLBI[J].J Atmos Ocean Tech,2001,18(6):830-850.
4BEVIS M, BUSINGER S, CHISWELL S, et al. GPS meteorology : Mapping zenith wet delays onto precipita- ble water[J]. Journal of applied meteorology, 1994,33 (3) :379-386.
5ROCKEN C, HOVE T V, JOHNSON J, et al. GPS/ STORM-GPS sensing of atmospheric water vapor for meteorology[J]. Journal of Atmospheric and Oceanic Technology, 1995,12(3) :468-478.
6BEVIS M, BUSINGER S, HERRING T A, et al. GPS meteorology:remote sensing of atmospheric water va-por using the Global Positioning System[J]. Journal of Geophysical Research: Atmospheres ( 1984--2012 ), 1992,97(D14) : 15787-15801.
7BOEHM J, HEINKELMANN R, SCHUH H. Short Note:a global model of pressure and temperature for geodetic applications[J]. Journal of Geodesy, 2007,81 (10) :679-683.
8GAO B C,KAUFMAN Y J. Water vapor retrievals u- sing moderate resolution imaging spectroradiometer (MODIS) near-infrared channels EJ 1. Journal of Geo- physical Research: Atmospheres ( 1984--2012 ), 2003, 108(D13).
