LDCALIR

Name

ldcalir

Purpose

Load calibration information for OSIRIS XD data from a calib file.

Description

Calling Sequence

ldcalir,calibfile,calib,valid

Inputs

calibfile - Name of calibration file to read.

Optional Input Parameters

Keyword Input Parameters

CALIBPATH - Path to location to look for calibration files (flat).
The default is the current directory.
SILENT - Flag, if true suppresses all informational output.
NOFLAT - Flag, if true suppresses loading the flat field image.

Outputs

calib - anonymous structure with calibration information
tag contents and usage:
height - height of slit in pixels.
nor - number of orders in spectral image.
por - maximum polynomial order for wavlength calibration.
quadratic=2
slope - slope of each order (dy/dx).
x1 - starting x value of each order.
x2 - ending x value of each order.
y0 - y value at bottom of slit for x=0 for each order.
flat - Strip format flat image.
flatname- Name of flat field image loaded.
cof - Wavelength calibration poly coeffs [nor,por].
npts - Total number of points (all orders)
w - Wavelength values for each order [npts].
o - Range of points in each order [nor,2].
valid - Flag, if true indicates a valid calibration set was loaded. The
contents of calib are unreliable if this flag is false.

Keyword Output Parameters

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

95/09/14, Written by Marc W. Buie, Lowell Observatory
96/05/27, MWB, changed structure organization and added a new, improved
file format.
97/12/18, MWB, added NOFLAT keyword