• Alber, C., R. Ware, C. Rocken, J. Braun, Inverting GPS double differences to obtain single path phase delays, Geophys. Res. Lett., 27, 26612664, 2000.
  • Anderson, K. D., Tropospheric refractivity profiles inferred from low-elevation angle measurements of Global Positioning System (GPS) signals, AGARD Conf. Proc.AGARD-CP-567-2, 16, 1994.
  • Axelrad, P., C. J. Comp, P. F. MacDoran, SNR based multipath error correction for GPS differential phase, IEEE Trans. on Aerosp. Electron. Syst., 322, 650660, 1996.
  • Bean, B. R., E. J. Dutton, Radio Meteorology, 423, Dover, Mineola, N. Y., 1968.
  • 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., 97D14, 15,78715,801, 1992.
  • Born, M., E. Wolf, Principles of Optics: Electromagnetic Theory of Propagation, Interference, and Diffraction of Light, 856, Pergamon, New York, 1964.
  • Businger, S., S. R. Chiswell, M. Bevis, J. Duan, R. A. Anthes, C. Rocken, R. H. Ware, T. VanHove, F. S. Solheim, The promise of GPS in atmospheric monitoring, Bull. Am. Meteorol. Soc., 77, 518, 1996.
  • Chen, G., T. A. Herring, Effects of atmospheric azimuthal asymmetry on the analysis of space geodetic data, J. Geophys. Res., 102B9, 20,48920,502, 1997.
  • Dixon, T. H., An introduction to the Global Positioning System and some geological applications, Rev. of Geophys., 292, 249276, 1991.
  • Fjeldbo, G., A. J. Kliore, V. R. Eshleman, The neutral atmosphere of Venus as studied with the Mariner V radio occultation experiments, Astron. J., 762, 123140, 1971.
  • Gaikovich, K. P., Ground-based Doppler radio-frequency refractometry of the atmosphere, Radiophys. and Quantum Electron., 353–4, 149154, 1992.
  • Gaikovich, K. P., M. I. Sumin, Reconstruction of the altitude profiles of the refractive index, pressure, and temperature of the atmosphere from observations of the astronomical refraction, Izv. Russ. Acad. Sci. Atmos. Oceanic Phys., 22, 710715, 1986.
  • Gandin, L. S., Objective Analysis of Meteorological Fields, 242, Isr. Program for Sci. Transl., Jerusalem, 1965.
  • Herring, T., The Global Positioning System, Sci. Am., 2742, 4450, 1996.
  • Kirchengast, G., J. Hafner, W. Poetzi, The CIRA86aQ_UoG model: An extension of the CIRA-86 monthly tables including humidity tables and a Fortran95 global moist air climatology model, IMG/UoG Techn. Rep. for ESA/ESTEC8Eur. Space Agency, Paris, France, 1999.
  • Kolosov, M. A., A. G. Pavel'yev, Radio transillumination of the atmosphere by artificial and natural sources, J. Commun. Technol. Electron., 2712, 3037, 1982.
  • Kursinski, E. R., G. A. Hajj, J. T. Schofield, R. P. Linfield, K. R. Hardy, Observing Earth's atmosphere with radio occultation measurements using the Global Positioning System, J. Geophys. Res., 102D19, 23,42923,465, 1997.
  • Melbourne, W. G., E. S. Davis, C. B. Duncan, G. A. Hajj, K. R. Hardy, E. R. Kursinski, T. K. Meehan, L. E. Young, T. P. Yunck, The application of spaceborne GPS to atmospheric limb sounding and global change monitoring, JPL Publ., 94-18, 147, 1994.
  • Niell, A. E., Global mapping functions for the atmospheric delay at radio wavelengths, J. Geophys. Res., 101B2, 32273246, 1996.
  • Rocken, et al., Analysis and validation of GPS/MET data in the lower troposphere, J. Geophys. Res., 102D25, 29,84929,866, 1997.
  • , Bernese GPS Software Version 4.0M. Rothacher, L. Mervart, Astron. Inst., Univ. of Berne, Bern, Switzerland, 1996.
  • Sokolovskiy, S. V., Tracking tropospheric radio occultation signals from low Earth orbit, Radio Science, 2001.
  • Springer, T. A., U. Hugentobler, IGS Ultra rapid products for near-real-time applications, Eos Trans., AGU, 8148, Fall Meet. Suppl., F320, 2000.
  • Vorob'ev, V. V., T. G. Krasil'nikova, Estimation of accuracy of the atmospheric refractive index recovery from Doppler shift measurements at frequencies used in NAVSTAR system, Izv. Russ. Acad. Sci. Atmos. Oceanic Phys., 29, 602609, 1994.
  • Ware, R., C. Alber, C. Rocken, F. Solheim, Sensing integrated water vapor along GPS ray paths, Geophys. Res. Lett., 24, 417420, 1997.
  • Zumberge, J. F., M. B. Heflin, D. C. Jefferson, M. M. Watkins, F. H. Webb, Precise point positioning for the efficient and robust analysis of GPS data from large networks, J. Geophys. Res., 102B3, 50055017, 1997.
  • Zumberge, J. F., M. M. Watkins, F. H. Webb, Characteristics and applications of precise GPS clock solutions every 30 seconds, Navigation, 444, 449456, 1998.