NAME

midut -- Compute UT for midpoint of observation

USAGE

midut images

PARAMETERS

images

List of images to process. Any image template can be used.

keywrd = "midut"

Keyword to use for the mid exposure UT. It should be a new keyword.

ut = "ut"

Keyword containing the starting UT.

exptime = "exptime"

Keyword containing the exposure time.

DESCRIPTION

For each image in the input list the task computes the UT at the midpoint of the observation from the starting UT and exposure time, and adds this value to the image header, under a new keyword.

EXAMPLES

1.- Compute the midpoint UT for a list of images:

lo> midut image1,image2,image3

2.- The same example, but assuming the the exposure time is specified in the ITIME keyword:

lo> midut image* exptime="itime"

TIME REQUIREMENTS

Since this task is implemented as a CL script, it may be slow for long image lists.

BUGS

This task requires the images package loaded. It does not load it automaticaly.
Temporary files of the form "tmp*" may be left around if the task terminates abnormaly.

SEE ALSO

hedit