[evlatests] Question about SY tables

[Bryan Butler]

i should be a bit more clear - by "about" i mean that it's been deployed 
on the test MCAF.  moving that to production won't happen today, but 
maybe in a week or so, when we're convinced it's all working properly.

	-bryan


Bryan Butler wrote, On 1/28/11 08:41 AM:
>
> note that we are about to switch to a binary SysPower file.  bill, you
> should get the format from rich moeser.
>
> 	-bryan
>
>
> bcotton at nrao.edu wrote, On 1/28/11 05:50 AM:
>> Rick,
>>
>>      The format of the SysPower.xml table makes it easy to lose entries
>> but if the antennas are labeled correctly, the AIPS table should be
>> correctly labeled.  The way to check for sure is to look at the
>> SysPower.xml for the affected antenna and spectral window.  This is a
>> (HUGE) text file that you can look at in a text editor with zillions
>> of entries like:
>> <row>
>>       <antennaId>Antenna_10</antennaId>
>>       <spectralWindowId>SpectralWindow_0</spectralWindowId>
>>       <timeInterval>4791441374499999744 1000000512</timeInterval>
>>       <feedId>0</feedId>
>>       <numReceptor>2</numReceptor>
>>       <switchedPowerDifference>1 2 -1.617337 0.554469</switchedPowerDifference>
>>       <switchedPowerSum>1 2 115.65394 114.87765</switchedPowerSum>
>>       <requantizerGain>1 2 512.0 512.0</requantizerGain>
>> </row>
>>
>> Times are mjd in nanoseconds.  Note, Antenna and spectral window Ids
>> are NOT antenna or IF numbers and you have to look them up in the
>> Antenna.xml (antenna number is the integer value of the second two
>> characters in name) and SpectralWindow.xml (the relationship between
>> spectral window and AIPS 'IF" is complex) tables.
>>
>> -Bill
>>
>>
>>
>> Rick Perley writes:
>>    >       While editing the SY tables for the 'flux densities' data for
>>    >   L-band, I noted subband 4 (1180 -- 1244 MHz) has very nice switched
>>    >   power data.  This is unexpected, as the SPFLG plots for this subband
>>    >   show the presence of very strong interference -- the GPS L2 signal is
>>    >   centered at 1227 MHz, and should (must!) wreck havoc with switched power.
>>    >
>>    >       So:  The Question:  How sure are we that the SY table entries
>>    >   originate from the identified subband?  That is -- how sure are we that
>>    >   the data I'm looking at (in AIPS) which is listed for subband 4 really
>>    >   is from that subband?
>>    >
>>    >
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