! ! 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 step to ensure the INDEX lines are correct. 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 Overflows have been replaced by -2.0 in the appropriate column and empty !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 recognizes 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' / 143 13:00.06 57.7 61.7 143 14:00.08 54.5 57.8 143 15:00.08 53.4 56.8 143 16:00.08 5.7 56.4 143 17:00.08 53.2 56.3 143 18:00.06 53.1 54.1 143 18:10.08 51.6 54.1 143 18:40.08 0.6 58.6 143 18:50.08 56.1 58.7 ! ! Station Comments: ! !143 11:35.52:"this log file included 2 files. one is for s2 controling !143 11:35.52:"pc(tape position number, tape user information....). !143 11:35.52:"the other is for vlba rack controling pc( tsys values). !143 11:39.51:"this is first time to do s2 experiment by our s2fs program. !143 11:40.45:"if there is any problem, please let me know. thank you. !143 11:40.45:"before exp. clock offset=utc(seshan25)-utc(gps)=3.76 us. !143 11:40.45:"after exp. clock offset=utc(seshan25)-utc(gps)=3.75 us. !143 11:40.45:"the frequency accuracy is -0.51X10(-12). !143 19:00.58:" !143 19:00.58:" !143 11:33.02:" w030c2 2000 SHANG_S2 S Sh !143 11:33.03:" S SHANG_S2 AZEL 0.0040 30.0 2 -999.9 999.9 18.0 2 -999.9 999.9 0.0 Sh !143 11:33.03:" Sh SHANG_S2 -2831686.92000 4675733.68100 3275327.68200 !143 11:33.03:" SHANG_S2 021660 !143 11:33.03:" drudg version 000330 compiled under FS 9.4.10 /