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Program: irdspos

Purpose: Extract projected sky positions from positions
in an IRDS set.

Category: IRAS

File: irdspos.c

Author: Fred Lahuis

Keywords:

IRSET= IRDS data set.

POS= Pixel position for which to return the [1,1,0,1]
sky position. The pixel position should be given as
an array containing SAMPLE , SDET, SNIP and TICK in
subsequent order.
SDET = 0 corresponds to boresight,
SDET < 0 corresponds to the center of gravity of
band number SDET (see IRCC_BANDNR etc.).
Use of one of the hidden keywords SAMPLE, TICK, SDET
and SNIP overwrites the corresponding value given here.

COOR= Coordinate system. [as defined in the header]
Standard coordinate systems:
Equatorial
Galactic
Ecliptic
Supergalactic
Sunreferenced

**PROJ= Type of projection. [NONE]
Entering H(elp) or ? returns the projections possible.

**SAMPLE= Array containing sequential SAMPLE points. [pos[0]]

**SDET= Array containing sequential SDET points. [pos[2]]
SDET = 0 corresponds to boresight,
SDET < 0 corresponds to the center of gravity of
band number SDET (see IRCC_BANDNR etc.)

**SNIP= Array containing sequential SNIP points. [pos[3]]

**TICK= Array containing sequential TICK points. [pos[1]]


Description:

Comments:

Updates: Juli 2 1991: FL Document created.
December 4 1991: FL input to COOR and PROJ changed.