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Fourier Analysis of GNSS-LEO Radio Occultation Signals, Resolution and Limitations

  • A. S. Jensen
  • M. S. Lohmann
  • H.-H. Benzon
  • A. S. Nielsen
Chapter

Abstract

This paper investigates the limitations imposed by the receiver on the accuracy of the Fourier techniques related to radio occultations in the Earth atmosphere. These limitations are related to sampling frequency and signal-to-noise ratio, as well as diffraction. The impact of each of these limiting factors are discussed and analysed in terms of measurement accuracy and resolution. A main result is that higher order phase variations in the received signal must be taken into account in order to determine the sampling rate.

Keywords

Geometrical Optic Diffraction Limit Radio Occultation Persistence Time Refractive Index Gradient 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • A. S. Jensen
    • 1
  • M. S. Lohmann
    • 1
  • H.-H. Benzon
    • 1
  • A. S. Nielsen
    • 1
  1. 1.Danish Meteorological InstituteResearch and Development DepartmentCopenhagenDenmark

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