[daip] New Ticket - [!HRG-988608]: AIPS - SPLIT troubles - SPLCOP FOUND NO SAMPLES error message
Robert Jeffrey
do-not-reply at nrao.edu
Wed Mar 27 11:42:59 EDT 2013
New Ticket: AIPS - SPLIT troubles - SPLCOP FOUND NO SAMPLES error message
I am using AIPS 31DEC13 to reduce VLBA data. We have 9 epochs of observations (project BB301 A->I), each of which is correlated at 9 different phase pointings (labelled E4,E3,…,W4). For each epoch, these are loaded as 9 multi-source UVDATA files, of which the first contains the calibrator target and the E4 science pointing, and the remaining 8 contain only the science data for one phase pointing per file. I have flagged and calibrated in the first of these, and I am able to SPLIT this multi-source file for imaging. I use TACOP to copy the final CL and FG tables to the other phase pointings, but when I then try to SPLIT these to apply the calibration, AIPS returns the error message:
asosx1> SPLIT1: Task SPLIT (release of 31DEC13) begins
asosx1> SPLIT1: You are using a non-standard program
asosx1> SPLIT1: Averaging all selected channels in frequency
asosx1> SPLIT1: Doing subarray 1
asosx1> SPLIT1: UVGET: Using flag table version 2 to edit data
asosx1> SPLIT1: Create SS433_C0 .SPLIT . 1 (UV) on disk 1 cno 45
asosx1> SPLIT1: Applying CL Table version 2
asosx1> SPLIT1: SPLCOP FOUND NO SAMPLES OUT OF 573459 POSSIBLE
asosx1> SPLIT1: IS SUBARRAY 1 IN CL/SN TABLE?
asosx1> SPLIT1: Previously flagged flagged by gain kept
asosx1> SPLIT1: Partially 36 0 0
asosx1> SPLIT1: Fully 0 565425 0
asosx1> SPLIT1: SPLCOP: ERROR - NO DATA WRITTEN
asosx1> SPLIT1: Destroyed 1 extension files of type FQ
asosx1> SPLIT1: Destroyed 1 extension files of type NX
asosx1> SPLIT1: Destroyed UV image file: catno= 45 disk= 1
asosx1> SPLIT1: PROBLEM WITH SOURCE: SS433_C0 NO VIS SELECTED
asosx1> SPLIT1: FAILED TO SELECT VALID DATA
asosx1> SPLIT1: Purports to die of UNNATURAL causes
asosx1> SPLIT1: asosx120 31DEC13 TST: Cpu= 10.3 Real= 63 IO= 6770
This appears for all epochs. I have used PRTAB to inspect these CL tables, and there is no sign of any missing data/calibrations (or at least, there are lines for all times corresponding both to calibrator and science scans). The inputs I am using for SPLIT are given below. By way of example, the PRTAB output for the first SS433_C0 scan (epoch D, time range 0/09:00:50 - 0/09:07:40 ) is given in the attached file: PRTAB.txt.
Thank you.
SPLIT inputs:
>inp
AIPS 1: SPLIT Task to split multi-source uv data to single source
AIPS 1: Adverbs Values Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: also works on single files.
AIPS 1: INNAME 'MULTI_C0' Input UV file name (name)
AIPS 1: INCLASS 'UVDATA' Input UV file name (class)
AIPS 1: INSEQ 2 Input UV file name (seq. #)
AIPS 1: INDISK 1 Input UV file disk unit #
AIPS 1: SOURCES *all ' ' Source list
AIPS 1: QUAL -1 Source qualifier -1=>all
AIPS 1: CALCODE ' ' Calibrator code ' '=>all
AIPS 1: TIMERANG *all 0 Time range to copy
AIPS 1: STOKES ' ' Stokes type to pass.
AIPS 1: SELBAND -1 Bandwidth to select (kHz)
AIPS 1: SELFREQ -1 Frequency to select (MHz)
AIPS 1: FREQID -1 Freq. ID to select.
AIPS 1: BIF 0 Lowest IF number 0=>all
AIPS 1: EIF 0 Highest IF number 0=>all
AIPS 1: BCHAN 1 Lowest channel number 0=>all
AIPS 1: ECHAN 0 Highest channel number
AIPS 1: SUBARRAY 0 Subarray, 0=>all
AIPS 1: DOCALIB 2 > 0 calibrate data & weights
AIPS 1: > 99 do NOT calibrate weights
AIPS 1: GAINUSE 0 CL (or SN) table to apply
AIPS 1: DOPOL -1 If >0 correct polarization.
AIPS 1: PDVER 0 PD table to apply (DOPOL>0)
AIPS 1: BLVER -1 BL table to apply.
AIPS 1: FLAGVER 0 Flag table version
AIPS 1: DOBAND -1 If >0 apply bandpass cal.
AIPS 1: Method used depends on value
AIPS 1: of DOBAND (see HELP file).
AIPS 1: BPVER -1 Bandpass table version
AIPS 1: SMOOTH *all 0 Smoothing function. See
AIPS 1: HELP SMOOTH for details.
AIPS 1: OUTCLASS ' ' Output UV file name (class)
AIPS 1: OUTSEQ 0 Output UV file name (seq. #)
AIPS 1: OUTDISK 1 Output UV file disk unit #.
AIPS 1: DOUVCOMP -1 1 (T) => compressed data
AIPS 1: APARM 2 *rest 0 Control information:
AIPS 1: 1 = 1 => avg. freq. in IF
AIPS 1: multi-channel out
AIPS 1: = 2 => avg. freq. in IF
AIPS 1: single channel out
AIPS 1: = 3 => avg IF's also
AIPS 1: 2 = Input avg. time (sec)
AIPS 1: 3 > 0 => Drop subarrays
AIPS 1: 4 > 0 => calibrate weights
AIPS 1: 5 = 0 pass only xc data
AIPS 1: = 1 pass xc and ac data
AIPS 1: = 2 pass only ac data
AIPS 1: 6 > 0 add full source name
AIPS 1: to header
AIPS 1: NCHAV 128 Number of chan. to average.
AIPS 1: (used if APARM(1) = 1)
AIPS 1: <= 0 -> ALL
AIPS 1: CHINC 1 Channel incr. between output
AIPS 1: channels (used if APARM(1)=1)
AIPS 1: ICHANSEL *all 0 Array of channel start, stop,
AIPS 1: and increment numbers and IF
AIPS 1: number to be used when
AIPS 1: averaging in frequency.
AIPS 1: (used if APARM(1) = 2, 3)
AIPS 1: BADDISK *all 0 Disks to avoid for scratch
Ticket Details
===================
Ticket ID: HRG-988608
Department: AIPS Data Processing
Priority: Default
Status: Open
Link: https://help.nrao.edu/staff/index.php?_m=tickets&_a=viewticket&ticketid=3058
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