[daip] UVFLG
Jim Ulvestad
julvesta at aoc.nrao.edu
Thu Oct 6 18:17:32 EDT 2005
I've gone ahead and changed the FG table by cheating and using TABED.
The original flag table that I can't change is FG 1 in the following
data set.
Note that the reason that shows up in the flag table is System idle, not all
upper case. I have tried running UVFLG with the mixed upper and lower
case and with all lower case.
The rows I tried to change in the FG table are rows 352, 393, 745, 837,
and 1178.
(In FG 2, note that PFLAG is 0000 and not 1111 for these rows, because
I changed them using TABED.)
Flag table 1 can be found at /DATA/COYOTE_1/FITS/BU30A.FGTABLE.
AIPS 1: Image=MULTI (UV) Filename=BU030A .FXPOL . 1
AIPS 1: Telescope=VLBA Receiver=VLBA
AIPS 1: Observer=BU030 User #= 145
AIPS 1: Observ. date=26-FEB-2005 Map date=06-SEP-2005
AIPS 1: # visibilities 918247 Sort order TB
AIPS 1: Rand axes: UU-L-SIN VV-L-SIN WW-L-SIN TIME1 BASELINE
AIPS 1: SOURCE FREQSEL INTTIM GATEID CORR-ID WEIGHT
AIPS 1: SCALE
AIPS 1: ----------------------------------------------------------------
AIPS 1: Type Pixels Coord value at Pixel Coord incr Rotat
AIPS 1: COMPLEX 1 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 32 4.9714900E+09 0.56 2.5000000E+05 0.00
AIPS 1: IF 4 1.0000000E+00 1.00 1.0000000E+00 0.00
AIPS 1: RA 1 00 00 00.000 1.00 0.000000 0.00
AIPS 1: DEC 1 00 00 00.000 1.00 0.000000 0.00
AIPS 1: ----------------------------------------------------------------
AIPS 1: Coordinate equinox 2000.00
AIPS 1: Maximum version number of extension files of type CL is 8
AIPS 1: Maximum version number of extension files of type NX is 1
AIPS 1: Maximum version number of extension files of type IM is 1
AIPS 1: Maximum version number of extension files of type CT is 1
AIPS 1: Maximum version number of extension files of type MC is 1
AIPS 1: Maximum version number of extension files of type OB is 1
AIPS 1: Maximum version number of extension files of type GC 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 TY is 1
AIPS 1: Maximum version number of extension files of type PC 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 SU is 1
AIPS 1: Maximum version number of extension files of type CQ is 1
AIPS 1: Maximum version number of extension files of type FG is 3
AIPS 1: Maximum version number of extension files of type HI is 1
AIPS 1: Maximum version number of extension files of type SN is 6
AIPS 1: Maximum version number of extension files of type PL is 6
AIPS 1: Keyword = 'OLDRFQ ' value = 4.97149000D+09
AIPS 1: Keyword = 'SUBARRAY' value = 1
AIPS 1: UVFLG: Task to Flag selected UV data on disk.
AIPS 1: Adverbs Values Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INNAME 'BU030A ' UV data (name).
AIPS 1: INCLASS 'FXPOL ' UV data (class).
AIPS 1: INSEQ 1 UV data (seq. #). 0 => high
AIPS 1: INDISK 2 Disk unit #. 0 => any
AIPS 1: INFILE *all ' ' Text file name.
AIPS 1: SOURCES *all ' ' Sources selected/deselected
AIPS 1: SUBARRAY 0 Subarray number 0=>all.
AIPS 1: SELBAND -1 Bandwidth to flag (kHz)
AIPS 1: SELFREQ -1 Frequency to flag (MHz)
AIPS 1: FREQID -1 Freq. ID to flag. -1=>all.
AIPS 1: 0=> first Freq. ID.
AIPS 1: TIMERANG *all 0 Time: start day,hr,min,sec
AIPS 1: stop day,hr,min,sec.
AIPS 1: BCHAN 0 First frequency channel
AIPS 1: ECHAN 0 Last channel 0=>all
AIPS 1: BIF 0 First IF 0=>1
AIPS 1: EIF 0 Last IF 0=>all
AIPS 1: ANTENNAS 12 *rest 0 Antennas
AIPS 1: BASELINE *all 0 Baselines with ANTENNAS
AIPS 1: STOKES ' ' Stokes' parameters
AIPS 1: FLAGVER 1 Flag table version number
AIPS 1: Used w single-source too
AIPS 1: APARM *all 0 Clip on ampl. and weight
AIPS 1: (single source data only)
AIPS 1: 1:lower limit of amplitude
AIPS 1: 2:upper limit of amplitude
AIPS 1: 0 => use defaults
AIPS 1: sign is significant!
AIPS 1: 3:limit of weight
AIPS 1: The data with ampl. outside
AIPS 1: of a given range or weight
AIPS 1: less the given value are
AIPS 1: flagged (unflagged)
AIPS 1: Elevation flagging
AIPS 1: 4:elevation lower cutoff deg
AIPS 1: 5:elevation upper cutoff deg
AIPS 1: 6:Factor of suppression of
AIPS 1: spurious fringes caused by
AIPS 1: pulse cal when fringe
AIPS 1: rate close to zero.
AIPS 1: It must be >1
AIPS 1: 0 => do not flag due to
AIPS 1: this reason
AIPS 1: 7:>0 => Print source, time,
AIPS 1: baseline, U,V of expected
AIPS 1: zero fringe rate (U=0)
AIPS 1: 0 => do not print
AIPS 1: APARM=0 => flagging(unflag.)
AIPS 1: does not depend on APARM
AIPS 1: OPCODE 'REAS' 'FLAG','UFLG' or 'REAS'
AIPS 1: REASON 'System idle Reason (24 char.)
AIPS 1: '
AIPS 1: BDROP 0 First vis. no. to flag
AIPS 1: (not with flag tables)
AIPS 1: EDROP 0 Last vis. no. to flag
AIPS 1: (not with flag tables)
AIPS 1: DOHIST 1 > 0 -> add to history
Leonia Kogan wrote:
> As I understand, UVFLG (opcode='reas) should unflag all rows at the
> given FG table which
> include the 'reason' coincided (at all 24 characters) with the given
> REASON.
>
> All other parameters including an antenna numbers are not used.
>
> Can you send me:
>
> List of input parameters
> imh of the UV data,
> and the FG table print out
>
> Leonia
>
>
>
> Jim Ulvestad wrote:
>
>> Hi all,
>>
>> The unflag option in UVFLG (opcode 'reas') doesn't appear to be very
>> robust.
>> Claire tells me that it only works for data that were already flagged
>> in UVFLG, which is certainly my experience--I can't unflag data in
>> a flag table delivered from the VLBA correlator, using an antenna
>> number and a reason, with basically all other inputs defaulting.
>> There is no indication in the help file that I need to set other
>> parameters,
>> such as TIMERANG. If this is known behavior, perhaps it ought to be
>> in the help file. If it's not known behavior, perhaps it is a bug or an
>> incompetent user. (I got a PI letter from the analysts that said an
>> hour of
>> data was improperly flagged and should be unflagged, but apparently it
>> isn't so easy!!!)
>>
>> Thanks again,
>>
>> Jim
>>
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