adjust-offset

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adjust-offset

adjust-offset allows one to make manual adjustments to a dewar offset file

USAGE adjust-offset file deltax deltay [deltatheta] [deltascale]

INPUT

file.dewoff is the name of an existing dewar offset file

deltax is the x offset to be applied, in pixels

deltay is the y offset to be applied, in pixels

deltatheta is the angle offset to be applied, in degrees

deltascale is the factor by which the scale should be multiplied

OUTPUT a new version of file.dewoff is produced; the old file is moved to file.dewoff%

PARAMETERS none

Details:

Sometimes manual adjustments work better than those computed automatically. adjust-offset allows one to, for example, overlay predicted positions of apertures or spectral lines on an image and apply x, y, and theta adjustment to improve the fit. At present, this is the only way to align the IFU, or longslits.

Notes:

deltatheta and deltascale are optional, but deltatheta must be specified if deltascale is.
deltax, deltay, and deltatheta are additive factors, 0 => no change;
deltascale is a multiplicative factor, 1 => no change

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