Correlate pitch, roll with coma.
jan02
The coma parameter from the calibration fits (atoms
2000-05) was plotted verus the pitch, roll error for the cband data
for sep01 through jan02. The
plots show the correlation.
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Top. The amplitude of the pitch,roll error added in quadrature is plotted
versus the coma parameter. There is a definite correlation
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Bottom. Points with coma > .05 and pitch+roll > .005 were selected and
then the pitch /roll angle was plotted versus the coma angle. Both angles
are measured relative to the feed with zero being to the right when looking
uphill. The pitch,roll angle is defined to measure the maximum distance
(height) from the dish. This maps into the normal pitch, roll definition
as : 0deg negRoll, 90 deg PosPitch,180 PosRoll, 270 negPitch.
The correlation
can also be seen at sband.
processing: x101/cb/prfcomajan02.pro
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