Sigma QUick Infrared Camera User Manual download pdf (Page 26)

WHIRC Data Reduction Manual Version 2.0, 2014 June 26 26

Figure 3.1: Parameter file for the geotran task.

3.3.2 Small Field Mosaics

The two basic tasks within the upsqiid package which are useful for combining images:

xyget – Find common stars in the images and create a registration database

nircombine – Combine the registration database into a composite image

3.3.2.1 The xyget Task

The task xyget is an interactive task in which each of the images is displayed in turn and

a star common to all of the images is identified on the display. The measured centroid of

each of the star images is put into a database file of the sort ‘<inlist>.xycom’, where

‘inlist’ is the list of input images. The ‘<inlist>.xycom’ file is then used as the input to

the nircombine task which will combine the input images into a single output image.

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Sigma QUick Infrared Camera User Manual Page 26