Links to the plots:
the sefd fits vs za with
the fit residuals (.ps). (.pdf)
fits using za and az terms
(for comparison) (.pdf)
comparing
the Post,pre maria sefd curves (.ps) (.pdf)
Calibration data for lband wide was taken dec17-jun18 (after hurricane maria). Frequency data was taken at: (1155,1310,1375,1415) and (1415,1550,1610,1666). sefd curves were then computed fitting for sefd as a function of za. Fits using azimuth terms were also done, and are included for comparison (the installed curves are are the za only fits). The fitting function (with za in degrees) is:
g(za)=c0 +c1*za + c2*(za-14)^2 +c3*(za-14)^3where the ^2 and ^3 terms are only applied for za ge 14 degrees.
The plots show the sefd fits vs za with the fit residuals (.ps). (.pdf) :
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1415 MHz has twice the
measurements for the fits since it was included in both frequency
groups.
Note: The fits using za
and az terms (.ps) (.pdf) are available
for comparison. They are not the curves being used.
the new curves are valid 21sep17 -> xxx
the curves were installed 06jul18
The PreMaria and postMaria sefd curves were evaluated at za2..19 degs za and then compared in the plots below:
Comparing the
preMaria, postMaria sefd curve fits (.ps) (.pdf)