!
! EVN Calibration Information File - To be used with the AIPS ANTAB program
! 
! Experiment : VS08I
! Date(s)    : 
! Wavelength : 
! Stations   : Sh
! 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 and INDEX lines in this
! file for the other frequencies.
!
! Compiled by Cormac Reynolds (reynolds@jive.nl) Tue 07 Aug 2001
! Version: newantab.pl - 6 Aug 2001
!
! 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 Overflows have been replaced by -2 in the appropriate column and empty 
! columns by -3. 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 a brief description.
!
! 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.
!
! 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 
! (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'
/
!L1: lo=4200.00 MHz, bbc01=600.00 MHz, BW=16.000 MHz
!L2: lo=4200.00 MHz, bbc03=616.00 MHz, BW=16.000 MHz
172 11:00.13 55.3 57.9 
172 11:10.13 52.4 55.2 
172 12:00.16 52.3 54.5 
172 13:00.16 52.4 54.4 
172 14:00.16 52.4 54.2 
172 15:00.16 52.5 54.3 
172 15:21.96 53.4 55.4 
!
! Station Comments:
!
!172 10:22.43:"this log file included 2 files. one is for s2 controling
!172 10:22.43:"pc(tape position number, tape user information....).
!172 10:22.43:"the other is for vlba rack controling pc( tsys values).
!172 15:30.60:"
!172 15:30.60:"
!172 10:19.66:" vs08i     2001 SHANG_S2  S   Sh 
!172 10:19.66:" S  SHANG_S2 AZEL 0.0040 30.0     2 -999.9 999.9 18.0     2 -999.9 999.9 0.0 Sh      
!172 10:19.66:" Sh SHANG_S2 -2831686.92000  4675733.68100  3275327.68200          
!172 10:19.66:"       SHANG_S2  021660  
!172 10:19.66:"  drudg version 001102 compiled under FS 9.4.17  
!172 14:08.63:"weather:it's overcast.
!172 14:15.95:"before exp. clock offset=utc(seshan25)-utc(gps)=6.39us.
!172 14:16.18:"after exp. clock offset=utc(seshan25)-utc(gps)=6.40us.
!172 14:17.36:"the freqency accuracy is +-.63X10(-12).
/