[evlatests] Sys Cal saga.

[Bill Cotton]

"BB" == Bryan Butler <bbutler at nrao.edu> writes:

BB> Vivek Dhawan wrote, On 10/25/10 21:22 PM:
>> 
>> For OSRO-1 (1 subband per baseband, 2bb, 2 pol) the tables are populated
>> as follows: IF1 and IF2 appear different, pol1 and pol2 are identical.

BB> this is expected, since the SDM table only has a place for a single 
BB> polarization and we made a choice to put RCP in there.  this should 
BB> change in the near future, but i don't have a good timescale for it 
BB> (weeks would be a guess).  i suspect bill's filler reproduces the RCP 
BB> (which is in the SDM table) into the LCP part of the table in AIPS.
Bryan,

   I may be misunderstanding what's going on but I believe this is not
correct. The ASDM/SysPower.xml table has multiple receptors:
    <numReceptor>2</numReceptor>
    <switchedPowerDifference>1 2 31.650478 39.940025</switchedPowerDifference>
    <switchedPowerSum>1 2 0.599392 0.951718</switchedPowerSum>
    <requantizerGain>1 2 512.0 512.0</requantizerGain>
Which I assumed were the RCP and LCP values for a given spectral
window and copy these values to the appropriate place in the AIPS SY
table.  At least the AIPS SY table I looked at had different values
for pol 1 and pol 2.

-Bill



>> For RSRO data (8subbands per baseband, 2bb, 2 pol) all the subb are identical
>> and 2 pol are also identical. This feature is present in the ASDM table, not
>> caused by BDF2AIPS. (Thanks to Josh Marvil, Steve Myers for checking this
>> in the ASDM)

BB> the polarizations being the same is expected (see above comment), but 
BB> they should be different for each of the subbands.  i'll check with rich 
BB> about how he's populating that SDM table.

BB> 	-bryan

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