! ! EVN Calibration Information File - To be used with the AIPS ANTAB program ! ! Experiment : PIP ! Date(s) : ! Waveband : 18cm ! Stations : Po ! Comments : ! ! See the file pip_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 Overflows have been replaced by -2 in the appropriate column and missing !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 18cm !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! ! -------------------------------------------------------------------------- ! Tsys Values ! -------------------------------------------------------------------------- ! TSYS PO FT=1.0 TIMEOFF=0 INDEX= 'L1', 'R1', 'L2', 'R2' / !Column 1 = L1: lo=1295.00 MHz, bbc01=355.49 MHz, BW=8.000 MHz !Column 2 = R1: lo=1295.00 MHz, bbc02=355.49 MHz, BW=8.000 MHz !Column 3 = L2: lo=1295.00 MHz, bbc03=363.49 MHz, BW=8.000 MHz !Column 4 = R2: lo=1295.00 MHz, bbc04=363.49 MHz, BW=8.000 MHz 035 09:59.96 70.3 67.1 69.9 66.5 035 10:11.96 69.8 67.0 69.3 66.3 035 10:23.96 69.6 66.8 69.8 66.2 035 10:50.36 73.5 73.2 74.8 72.0 ! ! Station Comments: ! !035 09:45.13:" f02l1 2002 MEDICINA M Mc !035 09:45.13:" M MEDICINA AZEL 1.8270 45.0 2 -999.9 999.9 30.0 2 -999.9 999.9 0.0 Mc !035 09:45.13:" Mc MEDICINA 4461369.98800 919596.83200 4449559.18900 !035 09:45.13:" MEDICINA 1417600 !035 09:45.13:" drudg version 011201 compiled under FS 9.5.3 !035 09:46.00:"fog !035 09:47.93:" Receiver not well working! Tsys too high than usual, although we can sense !035 09:48.26:"CygnusA. /