• Beutler, G., I. I. Mueller, R. E. Neilan, The International GPS Service for Geodynamics (IGS): The story, GPS Trends in Precise Terrestrial, Airborne, and Spaceborne ApplicationsG. Beutler, et al., 313, Springer Verlag, New York, 1996.
  • Bevis, M., S. Businger, T. A. Herring, C. Rocken, R. A. Anthes, R. H. Ware, GPS meteorology: Remote sensing of atmospheric water vapor using the Global Positioning System, J. Geophys. Res., 97, 1578715801, 1992.
  • , BIFROST Project,GPS measurements to constrain geodynamic processes in Fennoscandia,Eos Trans. AGU,77,337341,August 27 ,1996.
  • Businger, S., S. R. Chiswell, M. Bevis, J. Duan, R. A. Anthes, C. Rocken, R. H. Ware, M. Exner, T. VanHove, F. S. Solheim, The promise of GPS atmospheric monitoring, Bull. Am. Meteorol. Soc., 77, 518, 1996.
  • Cess, R. D., et al., Intercomparison and interpretation of climate feedback processes in 19 atmospheric general circulation models, J. Geophys. Res., 95, 1660116615, 1990.
  • Chen, C.-T., E. Roeckner, Validation of the Earth radiation budget as simulated by the Max Planck Institute for Meteorology general circulation model ECHAM4 using satellite observations of the Earth Radiation Budget Experiment, J. Geophys. Res., 101, 42694287, 1996.
  • Dodson, A. H., P. J. Shardlow, L. C. M. Hubbard, G. Elgered, P. O. J. Jarlemark, Wet tropospheric effects on precise relative GPS height determination, J. Geod., 70, 188202, 1996.
  • Dragert, H., R. D. Hyndman, Continuous GPS monitoring of elastic strain in the northern Cascadia subduction zone, Geophys. Res. Lett., 22, 755758, 1995.
  • Elgered, G., Tropospheric radio path delay from ground-based microwave radiometry, Atmospheric Remote Sensing by Microwave RadiometryM. Janssen, 215258, John Wiley, New York, 1993.
  • Elgered, G., J. L. Davis, T. A. Herring, I. I. Shapiro, Geodesy by radio interferometry: Water vapor radiometry for estimation of the wet delay, J. Geophys. Res., 96, 65416555, 1991.
  • Emardson, T. R., G. Elgered, J. M. Johansson, Three months of continuous monitoring of atmospheric water vapor with a network of Global Positioning System receivers, J. Geophys. Res., 103, 18071820, 1998.
  • England, M. N., F. J. Schmidlin, J. M. Johansson, Atmospheric moisture measurements: A microwave radiometer-radiosonde comparison, IEEE Trans. Geosci. Remote Sens., GE-31, 389398, 1993.
  • Gaffen, D. J., W. P. Elliott, A. Robock, Relationships between tropospheric water vapor and surface temperature as observed by radiosondes, Geophys. Res. Lett., 19, 18391842, 1992.
  • Hogg, D. C., F. O. Guiraud, J. B. Snider, M. T. Decker, E. R. Westwater, A steerable dual channel microwave radiometer for measurement of water vapor and liquid in the troposphere, J. Appl. Meteorol., 22, 789806, 1983.
  • Jarlemark, P. O. J., Microwave radiometry for studies of variations in atmospheric water vapor and cloud liquid content, Licentiate thesis,Tech. Rep. 181L,School of Electr. and Comput. Eng., Chalmers Univ. of Technol.,Goteborg, Sweden,1994.
  • Jarlemark, P. O. J., J. M. Johansson, andT. R. Carlsson, Wet delay variability calculated from radiometric measurements and its role in space geodetic parameter estimation,Radio Sci., 3331998.
  • Johansson, J. M., A study of precise position measurements using space geodetic systems, Ph.D. thesis,Tech. Rep. 229,School of Electr. and Comput. Eng., Chalmers Univ. of Technol.,Goteborg, Sweden,1992.
  • Johansson, J. M., G. Elgered, J. L. Davis, Wet path delay algorithms using microwave radiometer data, Contributions of Space Geodesy to Geodynamics: Technology, Geodyn. Ser., 25D. E. Smith, D. L. Turcotte, 8198, AGU, Washington D. C., 1993.
  • Liebe, H. J., Atmospheric spectral properties between 10 and 350 GHz: New laboratory measurements and models, Proceedings of the Specialist Meeting on Microwave Radiometry and Remote Sensing ApplicationsE. R. Westwater, 189196, Wave Propagation Laboratory, NOAA, Boulder, 1992.
  • Niell, A. E., Global mapping functions for atmosphere delay at radio wavelengths, J. Geophys. Res., 101, 32273246, 1991.
  • Rasool, S. I., C. De Bergh, The runaway green-house and the accumulation of CO2 in the Venus atmosphere, Nature, 226, 10371039, 1970.
  • Raval, A., V. Ramanathan, Observational determination of the greenhouse effect, Nature, 342, 758761, 1989.
  • Rind, D., E.-W. Chiou, W. Chu, J. Larsen, S. Oltmans, J. Lerner, M. P. McCormick, L. McMaster, Positive water vapour feedback in climate models confirmed by satellite data, Nature, 349, 500503, 1991.
  • Tsuji, H., Y. Hatanaka, T. Sagiya, M. Hasimoto, Coseismic crustal deformation from the 1994 Hokkaido-Toho-Oki earthquake monitored by a nationwide continuous array in Japan, Geophys. Res. Lett., 22, 16691672, 1995.
  • Wade, C. G., An evaluation of problems affecting the measurement of low relative humidity on the United States radiosonde, J. Atmos. Oceanic Technol., 11, 687700, 1994.
  • Waters, J. W., Absorption and emission by atmospheric gases, Methods of Experimental Physics, 12BM. L. Meeks, 142176, Academic, San Diego, Calif., 1976.