Looking at the data from the telescope.
Acquisition:
-
User projects typically take 1 sec dumps tracking a source
or scanning a region. They cover a limited frequency range.
-
Special project: X111 monitoring steps thru all the receivers
with 60 1 sec dumps. plot
of rfi 1100 to 1800 Mhz using lbw.
Fractional occurrence of rfi:
-
Compute rms/mean over every scan (typically 300 1 sec
recs).
-
Define rfi as values > 3 sigma in less than 80% of the
band
-
Make
histograms (.1 Mhz bins) by month, yearTodate, and by year of fractional
occurence of rfi.
Look at images of the x111 data.
If you are at AO, you can use idl to look at images of
the x111 data. Each 60 second bandpass is normalized to the mean or median
of the records.
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