! ! EVN Calibration Information File - To be used with the AIPS ANTAB program ! ! Experiment : VS04L ! Date(s) : ! Waveband : c ! Stations : KlSh ! Comments : ! ! See the file vs04l_tsys.ps on vlbeer for a plot of the Tsys in this ! experiment. ! ! N.B. You should remove from this file any antenna gain curves for antennas ! for which you have no data. ! N.B. Also check that the INDEX lines for each antenna are correct for this ! experiment/data format. ! N.B. If this experiment involves more than one frequency, you must run ANTAB ! once for each frequency. If the INDEX lines are different for each frequency ! then you must commenting out the INDEX lines in this file for the other ! frequencies. ! ! Compiled by Cormac Reynolds (reynolds@jive.nl) Wed ! Version: newantab.pl - 23 Apr 2002 ! ! Send any changes or updates to the antenna information or queries about this ! file to the email address given above. ! ! Polarization ! ------------ ! ! If there is only one polarization available this is indicated by having DPFU ! value 0.0 for RCP (0.0 for LCP for S and X Band). The RCP DPFU is specified ! first, followed by a comma, and then the LCP DPFU. ! ! INDEX Line ! ---------- ! ! It is IMPORTANT to ensure the INDEX lines are correct. By default they are ! arranged such that the IF with the lowest frequency LCP is L1, the lowest ! frequency RCP is R1, etc. If you have any doubts about them, please contact ! the email address above for assistance. ! ! Negative TSYS values: ! ---------------------- ! ! Overflows have been replaced by -2 in the appropriate column and missing ! measurements by -3. These values will be ignored by the AIPS task ANTAB. The ! user should replace any other numbers that they deem inappropriate (very high ! Tsys values) with appropriate numbers from adjacent scans or IFs. Some ! interpolation may already have been done by the producer of this file; see ! the comment line above for a brief description. ! ! TIMEOFF ! ---------- ! ! In the absence of continuous TSYS measurements, the TIMEOFF keyword can be ! used to incorporate TSYS measurements made before/after the scan. Since ANTAB ! requires that the measurement falls within the scan itself TIMEOFF=90 is ! used. This will displace the measurement by 90 seconds. In the case of short ! scans this number should be lowered so that the measurement falls within the ! scan. Try with lower values until ANTAB recognises the value. Alternatively, ! you may set TIMEOFF to 0 and use the option 'OFFSET' in ANTAB instead to ! increase the effective length of the scans. In many cases - especially when ! there are Tsys at both ends of the scan - this is preferable to using ! TIMEOFF. ! ! Global VLBI Experiments Correlated at Socorro ! --------------------------------------------- ! ! Global experiments correlated at Socorro may have the TSYS and GAIN ! information for the Effelsberg antenna (EB) transferred automatically with ! the data in a format suitable for use with the AIPS task APCAL (in the same ! way as the VLBA antennas). If this is the case then the TSYS and GAIN entries ! for EB should be removed from this file before running ANTAB. ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! ! PIs should carefully check TSYS values for obvious errors. ! ! ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !GAINS at 6cm !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! ! Seshan25 (Shanghai) at 6cm ! last update: Mar 2002 from X. Huang (CR 22Mar02) ! GAIN SH ALTAZ DPFU=0.0,0.095 FREQ=4000,6000 POLY=9.417E-01,5.585E-03,-1.921E-04,3.140E-06,-1.939E-08 / ! ! -------------------------------------------------------------------------- ! Tsys Values ! -------------------------------------------------------------------------- ! TSYS KL FT=1.0 TIMEOFF=0 INDEX= / ! ! Station Comments: ! !033 08:08.33" Log Opend !033 08:08.33" phcal off !033 08:08.33"location,KALYAZIN !033 08:08.33"KL KALYAZIN 2731190.441 2126198.284 5339535.645 !033 08:08.33"antenna,64.0,60.0,60.0,0.0,360.0,5.0,110.0,azel !033 08:08.33" VLBA style bit encoding !033 08:08.33"clk=32MHz !033 08:08.33"track1= 0, 0 !033 08:08.33"barrel=roll_off !033 08:08.33"station time off set: -1.16 usec !033 08:08.33"tsysa=70 !033 08:08.33"----------------------------- / TSYS SH FT=1.0 TIMEOFF=0 INDEX= 'L1', 'L2' / !Column 1 = L1: lo=4200.00 MHz, bbc01=600.00 MHz, BW=16.000 MHz !Column 2 = L2: lo=4200.00 MHz, bbc03=616.00 MHz, BW=16.000 MHz 033 07:30.08 50.3 52.2 033 07:36.08 50.4 52.6 033 08:30.11 49.6 51.6 033 09:00.11 49.3 51.0 033 10:00.11 49.1 50.5 033 10:21.08 49.4 50.7 033 10:30.08 49.2 50.6 033 11:00.11 50.0 51.0 033 12:00.11 50.7 51.4 033 12:16.08 51.7 52.7 033 12:23.91 49.2 50.6 ! ! Station Comments: ! !033 04:19.73:"this log file included 2 files. one is for s2 controling !033 04:19.73:"pc(tape position number, tape user information....). !033 04:19.73:"the other is for vlba rack controling pc( tsys values). !033 06:27.91:" vs04l 2002 SHANG_S2 S Sh !033 06:27.91:" S SHANG_S2 AZEL 0.0040 30.0 2 -999.9 999.9 18.0 2 -999.9 999.9 0.0 Sh !033 06:27.91:" Sh SHANG_S2 -2831686.92000 4675733.68100 3275327.68200 !033 06:27.91:" SHANG_S2 021660 !033 06:27.91:" drudg version 011201 compiled under FS 9.5.3 !033 12:19.41:"before exp. clock offset=utc(seshan25)-utc(gps)=18.98us. !033 12:19.55:"after exp. clock offset=utc(seshan25)-utc(gps)=18.98us. !033 12:20.03:"the frequency accuracy is 0.21*10(-12). !033 12:27.33:"weather:it's cloudy. /