LINKOBJ

Name

linkobj

Purpose

Cross check three source lists from one field and identify moving objects.

Description

Calling Sequence

linkobj,tag,fna,fnb,fnc,CANDIDATE=cand,NODISPLAY=nodisplay

Inputs

tag - name of the field, should not contain any blanks
fna - file name for the earliest image (Frame A)
fnb - file name for the middle image (Frame B)
fnc - file name for the last image (Frame C)

Optional Input Parameters

Keyword Input Parameters

BADCOL - Array of column numbers, any source found within 2.5 pixels of
these columns will be discarded. Default = no bad columns.
CANDIDATE - Flag, used for testing, when set will plot all detected sources
in all images. If you think a triplet should have been picked
up, set this to see if all three images were actually in the
original source list.
KEYLIST= - Name of a file containing a correspondence list. This list
associates a set of standard names with the actual keyword
names found in a FITS file header. If this keyword is
omitted, a default list is used, as if a file with the
following contents had been supplied:
AIRMASS K AIRMASS
DATE K DATE-OBS
DATETMPL T DD-MM-YYYY
EXPDELTA V 0.0
EXPTIME K EXPTIME
FILTER K FILTERS
FILENAME K CCDFNAME
OBJECT K OBJECT
UT K UT
The middle column is a flag. It may be K, for Keyword,
T, for Template, or V, for Value. If it is V, the contents
of the third field on that line should make sense for the
name in the first field.
MAXRATE - Maximum motion rate permitted for a tripet, in pixels/hour.
The default is 50.0 pixels/hour.
MINRATE - Minimum motion rate permitted for a tripet, in pixels/hour.
The default is 1.0 pixels/hour.
NODISPLAY - Flag, when set will suppress all image display allowing program
to be run in background or batch mode. This will be somewhat
faster as well. The display steps take a small but non-trivial
amount of time.
PATH - Optional path for original image directory.
If not specified, the current directory is used.

Outputs

Keyword Output Parameters

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

1998/03/11, Written by Marc W. Buie, Lowell Observatory
1999/03/22, extracted frmdxdy.pro
2010/07/19, MWB, minor tweak to accomodate change to frmdxdy and
stylistic edits.