[daip] [Fwd: Tsys table and antab file in experiments BE061]
Amy Mioduszewski
amiodusz at nrao.edu
Wed Aug 8 17:37:54 EDT 2012
Dear Eduardo,
The analysts forwarded your messages to daip at nrao.edu. The easiest thing to do
is run VLOG on your be061bcal.vlba file, that will separate the file into
different calibration files, including the TSYS part. VLOG also inserts any
lines needed for ANTAB.
Amy
Data Analysts wrote:
>
>
> ------------------------------------------------------------------------
>
> Subject:
> Tsys table and antab file in experiments BE061
> From:
> Eduardo Ros <eros at mpifr-bonn.mpg.de>
> Date:
> Tue, 07 Aug 2012 17:16:54 +0200
> To:
> analysts at aoc.nrao.edu
>
> To:
> analysts at aoc.nrao.edu
>
>
> Dear VLBA analysts,
>
> I am trying to calibrate the data files for experiment BE061 (three
> segments). I have noticed that the Tsys delivered with the files are
> corrupt for some antennas (showing negative values for a complete
> antenna, or completely crazy values). I have tried to upload those from
> the calibration files and I fear that those were recorded with the old
> system (100 MHz bandwidth) and are not enough for all IFs and all
> polarisation hands.
>
> So I get from the summary file in SCHED:
> Matching groups in /aux/vlb056a/p459kri/sched-10.1/catalogs/freq.dat:
> v7mm_c8
>
> Setup group: 1 Station: VLBA_BR Total bit rate: 2048
> Format: MARK5B Bits per sample: 2 Sample rate: 64.000
> Number of channels: 16 DBE type: RDBE_PFB Speedup factor:
> 1.00
>
> Disk used to record data.
>
> 1st LO= 42400.00 42400.00 42400.00 42400.00 42400.00 42400.00
> 42400.00 42400.00
> 42400.00 42400.00 42400.00 42400.00 42400.00 42400.00
> 42400.00 42400.00
> Net SB= L L L L L L
> L L
> L L L L L L
> L L
> Pol. = RCP LCP RCP LCP RCP LCP
> RCP LCP
> RCP LCP RCP LCP RCP LCP
> RCP LCP
> BBC = 1 2 3 4 5 6
> 7 8
> 9 10 11 12 13 14
> 15 16
> BBC SB= L L L L L L
> L L
> L L L L L L
> L L
> IF = A C A C A C
> A C
> A C A C A C
> A C
>
> VLBA FE= 7mm omit 7mm omit
> VLBA Synth= 15.4 7.6 11.6
>
> The following frequency sets based on these setups were used.
>
> Frequency Set: 1 Setup file default.
> LO sum= 43248.00 43248.00 43216.00 43216.00 43184.00 43184.00
> 43152.00 43152.00
> 43120.00 43120.00 43088.00 43088.00 43056.00 43056.00
> 43024.00 43024.00
> BBC fr= 848.00 848.00 816.00 816.00 784.00 784.00
> 752.00 752.00
> 720.00 720.00 688.00 688.00 656.00 656.00
> 624.00 624.00
> Bandwd= 32.000 32.000 32.000 32.000 32.000 32.000
> 32.000 32.000
> 32.000 32.000 32.000 32.000 32.000 32.000
> 32.000 32.000
> Matching frequency sets: 1 2 3 4 5 6 7 8 9
>
> Track assignments are:
> track1= 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32
> barrel=roll_off
>
> My headers are:
> AIPS 1: Image=MULTI (UV) Filename=BE061B .FITLD . 1
> AIPS 1: Telescope=VLBA Receiver=VLBA
> AIPS 1: Observer=BE061B User #= 720
> AIPS 1: Observ. date=17-MAY-2012 Map date=03-AUG-2012
> AIPS 1: # visibilities 1912686 Sort order TB
> AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN TIME1 BASELINE
> AIPS 1: SOURCE FREQSEL INTTIM GATEID CORR-ID
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat
> AIPS 1: COMPLEX 3 1.0000000E+00 1.00 1.0000000E+00 0.00
> AIPS 1: STOKES 4 -1.0000000E+00 1.00 -1.0000000E+00 0.00
> AIPS 1: FREQ 64 4.2992250E+10 0.75 5.0000000E+05 0.00
> AIPS 1: IF 8 1.0000000E+00 1.00 1.0000000E+00 0.00
> AIPS 1: RA 1 00 00 00.000 1.00 0.000000 0.00
> AIPS 1: DEC 1 00 00 00.000 1.00 0.000000 0.00
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: Coordinate equinox 2000.00
> AIPS 1: Maximum version number of extension files of type HI is 1
> AIPS 1: Maximum version number of extension files of type AT is 1
>
> A LISTR output gets:
> ID Source Freq(GHz) Velocity(Km/s) Rest freq (GHz)
> 1 All Sources 42.9923 0.0000 43.0240
> IF( 2) 43.0243 0.0000 43.0240
> IF( 3) 43.0563 0.0000 43.0240
> IF( 4) 43.0883 0.0000 43.0240
> IF( 5) 43.1203 0.0000 43.0240
> IF( 6) 43.1523 0.0000 43.0240
> IF( 7) 43.1843 0.0000 43.0240
> IF( 8) 43.2163 0.0000 43.0240
>
> Frequency Table summary
> FQID IF# Freq(GHz) BW(kHz) Ch.Sep(kHz) Sideband
> 1 1 42.99225000 32000.0020 500.0000 1
> 2 43.02425000 32000.0020 500.0000 1
> 3 43.05625000 32000.0020 500.0000 1
> 4 43.08825000 32000.0020 500.0000 1
> 5 43.12025000 32000.0020 500.0000 1
> 6 43.15225000 32000.0020 500.0000 1
> 7 43.18425000 32000.0020 500.0000 1
> 8 43.21625000 32000.0020 500.0000 1
>
> And the log files provide those values:
>
> Pulse-cal data:
> Bei den Phase-Cal-Daten:
> ! ----- PulseCal information for HN -----
> ! Scan headings are Station id, Project, Source/Qualifier, and scan time
> range.
> ! Basically speaking, scan changes inside loops are ignored.
> ! HN BE061B 3C345/0 138-05:45:00/138-05:49:59
> FREQUENCY HN /
> ! Tone Chan SB Pol ToneSkyFreq #bits LoFreq BW
> 'T01' 1 'L' 'RCP' 43175.00 1 43176.00 16000.0
> 'T02' 2 'L' 'LCP' 43175.00 1 43176.00 16000.0
> 'T03' 3 'L' 'RCP' 43143.00 1 43144.00 16000.0
> 'T04' 4 'L' 'LCP' 43143.00 1 43144.00 16000.0
> 'T05' 5 'L' 'RCP' 43111.00 1 43112.00 16000.0
> 'T06' 6 'L' 'LCP' 43111.00 1 43112.00 16000.0
> 'T07' 7 'L' 'RCP' 43079.00 1 43080.00 16000.0
> 'T08' 8 'L' 'LCP' 43079.00 1 43080.00 16000.0
> ! HN BE061B 3C345/0 138-05:45:00/138-05:49:59
> PULSE-CAL HN /
> 138 05:45:44 'CC' 358.54 63.0
> 138 05:45:44 'T01' 0.0083 -70.861
> 138 05:45:44 'T02' 0.0044 138.044
> 138 05:45:44 'T03' 0.0065 90.332
> 138 05:45:44 'T04' 0.0014 -162.175
> 138 05:45:44 'T05' 0.0043 163.171
> 138 05:45:44 'T06' 0.0039 -57.179
> 138 05:45:44 'T07' 0.0045 87.953
> 138 05:45:44 'T08' 0.0035 130.505
> 138 05:46:54 'CC' 358.60 63.0
>
> And TSYS data (the ones I wanted to read and give error):
> ! HN BE061B 3C345/0 138-05:45:00/138-05:49:59
> ! 1 7mm A RCP 1 L 776.00MHz 16M -43168.00MHz 9.34
> ! 2 7mm C LCP 2 L 776.00MHz 16M -43168.00MHz 6.32
> ! 3 7mm A RCP 3 L 744.00MHz 16M -43136.00MHz 9.27
> ! 4 7mm C LCP 4 L 744.00MHz 16M -43136.00MHz 6.33
> ! 5 7mm A RCP 5 L 712.00MHz 16M -43104.00MHz 9.21
> ! 6 7mm C LCP 6 L 712.00MHz 16M -43104.00MHz 6.35
> ! 7 7mm A RCP 7 L 680.00MHz 16M -43072.00MHz 9.14
> ! 8 7mm C LCP 8 L 680.00MHz 16M -43072.00MHz 6.36
> 138 05:45.517 189.0 187.5 186.5 188.2 187.2 183.7 174.1 186.7 ! 86.7
>
> My main question is, what should I index in a CONTROL block in ANTAB to
> get the values properly? I got puzzled with the frequency blocks and
> the data. Maybe those are more clear for you and you can give me the
> recipe for getting proper TSYS values.
>
> Apart from that, the data look very fine, the POSSM plots on the
> calibrators give very nice detections, etc.
>
> Thanks in advance for your help.
>
> Cheers,
>
> Eduardo Ros
>
>
> ------------------------------------------------------------------------
>
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