| Description: | The MWR operating program was upgraded to version 3.29 on 15 March 1999. This version
included a beam width correction as well as provided the capability to automatically level
the elevation mirror (that is, to automatically detect and correct offsets in the elevation
angle stepper motor position.)
The improvement in the quality of the tip curves resulting from the auto-leveling has been
dramatic: differences in the brightness temperatures at 3 airmasses (19.5 and 160.5
degrees) have been reduced from +/- 5 K to +/- 0.5 K. In order to take full advantage of this
improvement to detect and reject cloudy tip curves, the minimum value of the
goodness-of-fit coefficient for a valid tip curve has been increased from 0.995 to 0.998. |