[daip] gain missing in APCAL

[Arnaud Collioud]

Hi Eric, Hi Amy,

I am processing a VLBI S/X RDV session with 4 subarrays. I get the following issue with APCAL:

> APCAL1: Writing SN table   3 for subarray  3
> APCAL1: AMPCAL: NO GAIN FOR ANT:   3 POL: 1 IF:    1
> APCAL1: Purports to die of UNNATURAL causes

Please note that this only happens with this subarray...

Tsys and Gains are loaded manually thanks to ANTAB. The input file is as below:

! Amplitude calibration data for HH in rdv98. 
! For use with AIPS task ANTAB.
! Waveband(s) = s x.
! RXG files used for each LO: 
!     LO= 8080.00 MHz rcp: rdv98hhx.rxg 2007 03 27
!     LO= 2020.00 MHz rcp: rdv98hhs.rxg 2007 03 27
!     LO= 8580.10 MHz rcp: rdv98hhx.rxg 2007 03 27
!GAIN HH  ELEV DPFU=0.061,0       FREQ=7530,8630
!POLY=1.0000E+00
!/
!GAIN HH  ELEV DPFU=0.055,0       FREQ=1470,2570
!POLY=1.0000E+00
!/
GAIN HH  ELEV DPFU=0.061,0       FREQ=8030.1,9130.1
POLY=1.0000E+00
/
TSYS HH FT=1.0 TIMEOFF=0
INDEX= 'R1', 'R2', 'R3', 'R4', 'X', 'X', 'X', 'X'
!Column 1 = R5: bbc03, 8405.99 MHz, BW=8.000 MHz, USB, Tcal=17.0 K
!Column 2 = R6: bbc04, 8475.99 MHz, BW=8.000 MHz, USB, Tcal=17.0 K
!Column 3 = R7: bbc05, 8790.99 MHz, BW=8.000 MHz, USB, Tcal=17.0 K
!Column 4 = R8: bbc06, 8895.99 MHz, BW=8.000 MHz, USB, Tcal=17.0 K
!Column 5 = R1: bbc09, 2232.99 MHz, BW=8.000 MHz, USB, Tcal=16.0 K
!Column 6 = R2: bbc10, 2262.99 MHz, BW=8.000 MHz, USB, Tcal=16.0 K
!Column 7 = R3: bbc13, 2352.99 MHz, BW=8.000 MHz, USB, Tcal=16.0 K
!Column 8 = R4: bbc14, 2372.99 MHz, BW=8.000 MHz, USB, Tcal=16.0 K
/
100 17:59.33  57.5  53.2  53.8  59.1  59.3  51.1  57.1  55.5 
100 17:59.66 57.5 53.2 53.8 59.1 59.3 51.1 57.1 55.5
100 17:60.00 57.5 53.2 53.8 59.1 59.3 51.1 57.1 55.5
100 18:00.33 57.5 53.2 53.8 59.1 59.3 51.1 57.1 55.5
100 18:00.66 57.5 53.2 53.8 59.1 59.3 51.1 57.1 55.5
100 18:01.00 57.5 53.2 53.8 59.1 59.3 51.1 57.1 55.5
100 18:01.33 57.5 53.2 53.8 59.1 59.3 51.1 57.1 55.5
...etc...

What should I check to track this issue? Do you know the cause of it?

Thank you!
Cheers,
Arnaud