Effects of a Turbulent Atmosphere on Radar Propagation


             35GHz Radar profile of a storm

 35GHz clouds AIPS

Photograph from Dr. R. A. Kropfli, private communication.

Radar described in K. P. Moran, et al  "An Unattended Cloud-Profiling Radar for Use in Climate Research, “Bulletin of the American Meteorological Socitey, Vol. 79, No. 3, March 1998, 443-455.




                         Cobra Judy X-band and S-Band radar

AnalyticalStudies_image007 Cobra JudyA

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   The effects of the atmosphere on radar propagation were studied as an extension to a previous work that studied the effects of the atmosphere in Radio Astronomy.

   Mean measured atmospheric properties and spectra were used in a proprietary randomization technique to generate random atmosphere realizations.  These were then used to calculate the effective extra path length that is introduced to the radar signals when traveling through different atmospheric conditions.

   Radar measurements of the calibration sphere in orbit, taken by the Cobra Judy and other radars, were analyzed in order to demonstrate that these effects are indeed present in real data.  The Cobra Judy data chosen for this study were taken off Kamchatka (stormy weather) and Baja California (clear weather) in order to demonstrate the magnitude of these effects in different atmospheric conditions.