Ground-Based Radio Occultation Measurements Using the GRAS Receiver

Laust Olsen, Anders Carlström, Per Høeg

Abstract:	The dynamics and spectral content of ground based observations of GPS signals are investigated for signs of turbulence. The signals are tracked in open loop mode at 1000 Hz sampling frequency. For mid-latitude winter conditions we see little effect of turbulence inducing spectral broadening. But we are able to identify power spectrum slopes in the frequency range 1-5 Hz that are different from the GPS transmitter clock noise and in direct relation to the elevation angle, indicating weak atmospheric turbulence.
Published in:	Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004) September 21 - 24, 2004 Long Beach Convention Center Long Beach, CA
Pages:	2370 - 2377
Cite this article:	Olsen, Laust, Carlström, Anders, Høeg, Per, "Ground-Based Radio Occultation Measurements Using the GRAS Receiver," Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004), Long Beach, CA, September 2004, pp. 2370-2377.
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