[daip] [!6831]: AIPS - problem with u-v data after conversion to FITS

[Lynn Matthews]

Lynn Matthews updated #6831
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problem with u-v data after conversion to FITS
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           Ticket ID: 6831
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/6831



The FITS file size is 7745535360 bytes. Headers are below. There are fewer visibilities
in the re-read file. I note that I have another version of the u-v data (.UVLSF file) that I
was able to read in and out without a problem.

Lynn

Header of original file:
AIPS 1: Image=T Mon     (UV)         Filename=T Mon       .UVLIN .   2
AIPS 1: Telescope=EVLA               Receiver=EVLA
AIPS 1: Observer=Dr. Mass            User #= 2086
AIPS 1: Observ. date=05-DEC-2011     Map date=24-MAR-2014
AIPS 1: # visibilities    628687     Sort order  TB
AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  BASELINE  TIME1
AIPS 1:            INTTIM
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
AIPS 1: COMPLEX      3   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: STOKES       2  -1.0000000E+00       1.00 -1.0000000E+00    0.00
AIPS 1: FREQ       512   1.4193120E+09       1.00  3.9062500E+03    0.00
AIPS 1: IF           1   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: RA           1    06 25 13.000       1.00       3600.000    0.00
AIPS 1: DEC          1    07 05 08.560       1.00       3600.000    0.00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Coordinate equinox 2000.00
AIPS 1: Rest freq   1420.406         Vel type: RADIO   wrt LSR
AIPS 1: Alt ref. value  2.26630E+05  wrt pixel    1.00
AIPS 1: Maximum version number of extension files of type NX is   1
AIPS 1: Maximum version number of extension files of type HI is   1
AIPS 1: Maximum version number of extension files of type FQ is   1
AIPS 1: Maximum version number of extension files of type AN is   1
AIPS 1: Maximum version number of extension files of type CD is   1
AIPS 1: Maximum version number of extension files of type WX is   1
AIPS 1: Maximum version number of extension files of type FG is   4
AIPS 1: Keyword = 'CROSSPOW'  value =           -1
AIPS 1: Keyword = 'MAXABSU '  value = -1.000000E+00

Header of re-read file:
AIPS 1: Image=T Mon     (UV)         Filename=CRAP        .TST   .   1
AIPS 1: Telescope=EVLA               Receiver=EVLA
AIPS 1: Observer=Dr. Mass            User #= 2086
AIPS 1: Observ. date=05-DEC-2011     Map date=03-JUL-2015
AIPS 1: # visibilities    628191     Sort order  TB
AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  SUBARRAY  TIME1
AIPS 1:            INTTIM  ANTENNA1  ANTENNA2
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
AIPS 1: COMPLEX      3   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: STOKES       2  -1.0000000E+00       1.00 -1.0000000E+00    0.00
AIPS 1: FREQ       512   1.4193120E+09       1.00  3.9062500E+03    0.00
AIPS 1: IF           1   1.0000000E+00       1.00  1.0000000E+00    0.00
AIPS 1: RA           1    06 25 13.000       1.00       3600.000    0.00
AIPS 1: DEC          1    07 05 08.560       1.00       3600.000    0.00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Coordinate equinox 2000.00
AIPS 1: Rest freq   1420.406         Vel type: RADIO   wrt LSR
AIPS 1: Alt ref. value  2.26630E+05  wrt pixel    1.00
AIPS 1: Maximum version number of extension files of type HI is   1
AIPS 1: Maximum version number of extension files of type NX is   1
AIPS 1: Maximum version number of extension files of type FQ is   1
AIPS 1: Maximum version number of extension files of type AN is   1
AIPS 1: Maximum version number of extension files of type CD is   1
AIPS 1: Maximum version number of extension files of type WX is   1
AIPS 1: Maximum version number of extension files of type FG is   4
AIPS 1: Keyword = 'CROSSPOW'  value =           -1
AIPS 1: Keyword = 'MAXABSU '  value = -1.000000E+00


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