! ! EVN Calibration Information File - To be used with the AIPS ANTAB program ! ! Experiment : ! Date(s) : ! Wavelength : ! Stations : ! Comments : 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, commenting out the gains ! in this file for the other frequencies. ! ! Compiled by Cormac Reynolds (reynolds@jive.nl) ! Version: newantab.pl - October 2000 ! ! 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). ! ! 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 Overflows have been replaced by -2.0 in the appropriate column and empty ! columns by -3.0. The user should replace these numbers and others that they ! deem inappropriate (very high Tsys values and occasional negative numbers) ! 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 brief comments. ! ! TIMEOFFSET ! ---------- ! ! The TIMEOFFSET is used as EVN makes the TSYS measurements before the scan. ! Since ANTAB requires that the measurement falls within the scan itself ! TIMEOFFSET=90 is used. This will displace the measurement by 90 seconds. In ! the case of short scans this number should be changed so that the measurement ! falls within the scan (TIMEOFFSET needs to be lowered). Try with lower values ! until ANTAB recognises the value. Alternatively, you may set TIMEOFFSET to 0 ! and use the option 'OFFSET' in ANTAB instead to increase the effective ! length of the scans. ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! ! PIs should carefully check TSYS values for obvious errors. ! ! ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! / ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !GAINS at 6cm !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! ! Seshan25 (Shanghai) at 6cm ! (970318) ! GAIN SH ALTAZ DPFU=0.0,0.10 POLY=8.833E-01,9.150E-03,-2.971E-04,5.279E-06,-3.501E-08 / ! ! -------------------------------------------------------------------------- ! Tsys Values ! -------------------------------------------------------------------------- ! TSYS SH FT=1.0 TIMEOFF=90 INDEX= 'L1', 'L2' / 319 03:29.96 54.2 58.2 319 04:15.13 61.9 65.6 319 04:25.21 59.9 64.0 319 04:50.21 57.2 61.2 319 05:00.21 56.1 60.3 319 06:00.21 53.4 57.4 319 07:00.21 52.2 56.3 319 07:31.96 53.6 57.3 319 07:47.13 54.5 57.7 319 08:30.13 51.2 54.9 319 09:00.21 51.2 54.8 319 09:20.21 50.8 54.5 319 09:40.21 51.2 54.5 319 10:00.21 51.5 54.5 319 10:15.21 51.7 54.9 ! ! Station Comments: ! !319 02:59.93:"this log file included 2 files. one is for s2 controling !319 02:59.93:"pc(tape position number, tape user information....). !319 02:59.93:"the other is for vlba rack controling pc( tsys values). !319 03:24.41:" vs08v 2000 SHANG_S2 S Sh !319 03:24.41:" S SHANG_S2 AZEL 0.0040 30.0 2 -999.9 999.9 18.0 2 -999.9 999.9 0.0 Sh !319 03:24.41:" Sh SHANG_S2 -2831686.92000 4675733.68100 3275327.68200 !319 03:24.41:" SHANG_S2 021660 !319 03:24.41:" drudg version 000622 compiled under FS 9.4.15 !319 03:24.91:"weather:it's overcast !319 09:48.33:"before exp. the clock offset=utc(Sheshan25)-utc(GPS)=2.02 us !319 09:48.40:"after exp. the clock offset=utc(Sheshan25)-utc(GPS)=2.01 us !319 09:48.90:"the frequency accuracy is +-1*10(-12) S. !319 10:20.35:"following scans have trouble( antenna trouble): !319 10:22.95:"scan_name=319-0329: data are invalid from ut3h29m50s to 3h32m30s. !319 10:23.96:"scan_name=319-0731: data are invalid from ut7h31m50s to 7h32m40s. /