AIPS HELP file for Y2KSAVE in 31DEC21
As of Fri Dec 3 3:37:26 2021
Y2KSAVE: Verification/timing test; see HELP Y2K
TCODE INIT,TEST,READ, or WRIT
TMODE T or M
TMASK 1.0 63.0 test selection bit mask
Y2KSIZE SMALL,MEDIUM,LARGE test
DDISK 1.0 35.0 Disk drive #: master UVDATA
MDISK 1.0 35.0 Disk drive #: other masters
TDISK 1.0 35.0 Disk drive #: test files
IOTAPE 1.0 9.0 Input/output tape drive #.
Y2KDISK Disk area for READ and WRIT
EDGSKP 0.0 64.0 Pixels to skip at edges
TERSE -1.0 99.0 > 0 => reduced output
Printer disk file to save
BADDISK Disks to avoid
Variables set and saved by Y2K
INNAME Input file name
OUTNAME Output file name
INDISK 1st input disk #
IN2DISK 2nd input disk #
OUTDISK Output disk #
INTAPE Input tape drive #.
OUTTAPE Output tape drive #.
Y2KFILE Input/output area
TNAMF Actual name ='Y2KS','Y2KM',..
ROTATE Image rotation in degrees
IMSIZE Image size
CELLSIZE Image cell size (arc sec)
NITER Number clean components
FLUX Expected source flux (Jy)
UVTAPER Taper in UV plane
ZEROSP 0-spacing fluxes and weights
NOISE Noise level for VTESS
SHIFT Image shift x,y in arcsec
SCALR1 Pixels/beam for VTESS
SCALR2 VTESS number iterations
SCALR3 VTESS FLUX value
NBOXES Number Clean boxes
CLBOX Cleaning area
MINPATCH Min. BEAM half-width in AP.
MAXPIXEL Max pixels for clean search
NCOMP Number merged comps for CALIB
MPDIFS Comparison differences
NPIECE Number UV file FITAB pieces
QUANTIZE Quantization in FITAB
DOUVCOMP Compress files on disk
ROBUST Robust weighting parameter
Type: RUN file.
Use: Y2K performs the AIPS verification test of an AIPS system.
See the HELP file Y2K and the RUN files Y2KLOAD.001 and
Y2KEXEC.001. The purpose of this inputs file is to save
the full set of Y2K parameters and to perform bounds
checks on the parameters and to enable the use of TPUT
and TGET. The Y2K Help file should be used to set the
See HELP Y2K and EXPLAIN Y2K for details - summary below is not
fully maintained or complete.
Adverbs: input by user of Y2K
TCODE String*4 'INIT', 'TEST', 'READ', or 'WRIT'
TMODE String*1 'T' or 'M'
TMASK Scalar test selection bit mask (1-63)
Y2KSIZE String*8 'SMALL', 'MEDIUM', 'LARGE', 'HUGE' test
DDISK Scalar Disk drive # (1-9): master UVDATA
MDISK Scalar Disk drive # (1-9): other masters
TDISK Scalar Disk drive # (1-9): test files
IOTAPE Scalar Input AND output tape drive #. (1-9)
Y2KDISK String*8 Logical name of disk area to be used for
FITS-disk files in READ or WRIT instead
of actual magnetic tape.
' ' => use magnetic tape.
EDGSKP Scalar Number of pixels to skip at each edge
in comparing test and master images
TERSE Scalar > 0 => reduced output:
> 0 = drops INPUTS for all tasks and
TPHEAD when reading tape
> 2 = also drops CATALOG listings
> 3 = also drops IMHEADER listings
Use 0 on all new or uncertain systems.
OUTPRINT String*48 Disk file name in which to save the line
printer output. ' ' => use scratch and
print immediately for interactive jobs -
batch jobs use OUTPRINT =
'PRTFIL:BATCHjjj.nnn' (jjj = job #, nnn
= user #). When OUTPRINT is not blank,
multiple outputs are concatenated and
the file is not actually printed.
BADDISK Array (1,3 good on CVAX)
VERSION String*48 OLD,NEW,OLDPSAP,NEWPSAP,LOCAL
(also private dirs; use | to separate)
Adverbs: used as save area by the Y2K test itself
INNAME String*12 Input file name
OUTNAME String*6 Output file name
INDISK Scalar Input disk number
IN2DISK Scalar Input disk number
OUTDISK Scalar Output disk number
INTAPE Scalar Input tape drive #. (1-9)
OUTTAPE Scalar Output image tape drive # (1-9)
Y2KFILE Char*16 Input/output file area as :Y2Ks
TNAMF Char*4 Partial file name incl. problem size
ROTATE Scalar Image rotation in degrees
IMSIZE Array Image size
CELLSIZE Array Image cell size (arc sec)
NITER Scalar Number clean components
FLUX Scalar Expected source flux (Jy)
UVTAPER Array Taper in UV plane
ZEROSP Array Zero spacing fluxes and weights
NOISE Array Noise levels for VTESS
SHIFT Array Image center shift x,y in arcsec
SCALR1 Scalar Pixels/beam for VTESS
SCALR2 Scalar VTESS number iterations
SCALR3 Scalar VTESS FLUX target
NBOXES Scalar Number of Cleaning boxes
CLBOX Array Cleaning area
MINPATCH Scalar Min half width of beam portion in AP
MAXPIXEL Scalar Max # pixels searched for clean comp.
NCOMP Array(16) Number components to feed to CALIB from
the merged CC files
MPDIFS Array(5,12) (1-2,.) => peak, mean bits
(3-5,.) => dx,dy,dT
(.,1-6) => IMAGE, IMBEAM, APCLN, APRES,
(.,7-10) => IMCLN,
(.,11-12) => VTESS, VTESSC
NPIECE Scalar Number UV-file pieces written by FITAB
QUANTIZE Scalar Quantization level for FITAB image writing
(always 0 for now)
DOUVCOMP Scalar > 0 => write UV files in compressed mode.
ROBUST Scalar Robustness imaging weighting parameter.
Y2K runs in four different modes: (TCODE)
INIT = starts from the original master UV dataset, and
(re)computes master files (does ALLDEST).
The "mask" TMASK controls which steps execute.
TEST = re-does the INIT computation but stores the new
files under different names and compares against
masters. The "mask" TMASK controls which steps
execute. TEST steps use either the TEST run output
of the previous step (TMODE=T) or the INIT run
WRIT = write out all master files to tape.
READ = read in all master files from tape.
A binary mask controls which steps of the test execute:
TMASK +1=>SORT, +2=>IMAGR, +4=>APCLN,
+8=>CALIB, +16=>IMAGR-Clean, +32=>VTESS
For example, TMASK=54 would execute all but CALIB and SORT.
Input data files for test steps are selected by the TMODE
adverb which has two possible values: 'T' or 'M'.
'T' mode uses Test output from previous steps as input
to the current task. 'M' mode uses Master input for
The adverb Y2KSIZE controls the size of the test performed:
'S' 512x512 image, 5000 clean components, 15000 vis
'M' 1024x1024 image, 15000 clean components, 75000 vis
'L' 2048x2048 image, 25000/75000 Clean components,
'H' 4096x4096 images, APCLN not used, 4-resolution IMAGR
used with 35000/200000 Clean components
Enter HELP Y2K or EXPLAIN Y2K for more details.