| Description: | See below for details of reprocessing that was completed on 20150605. Original DQR
category: 4 (Red, Incorrect).
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The Solaris computer was changed out in late January. The antenna parameters were not
changed when this happened so that the SGP's antenna gain and beamwidths were used to
calculate the radar constant. This results in an underestimation of 4.69 dB in reflectivity.
The difference in antenna gain is 57.2-52.73 dB or 4.47 dB. Since the gain is squared in
the denominator of the radar constant, this results in an error of 8.94 dB due to the
antenna gain alone.
The difference in beamwidth is 0.19 to 0.31. 20log(.19/.31) = -4.25 dB.
Total reflectivity error = 8.94 dB - 4.25 dB = 4.69 dB |