ObitPosition.c File Reference

ObitPosition module function definitions. More...

#include "ObitPosition.h"

Functions
gint	ObitPositionWorldPos (gfloat pixel[2], ObitImageDesc *desc, gdouble coord[2])
	Public: Routine to determine accurate position for pixel coordinates.
gint	ObitPositionWorldPosLM (gdouble doff[2], ObitImageDesc *desc, gdouble coord[2])
	Public: Routine to determine accurate position for pixel coordinates from offsets from the reference position.
gint	ObitPositionXYpix (gdouble coord[2], ObitImageDesc *desc, gfloat pixel[2])
	Public: Routine to determine accurate pixel coordinates for an RA and Dec offsets from the reference position.
gint	ObitPositionXYpixLM (gdouble coord[2], ObitImageDesc *desc, gdouble doff[2])
	Public: Routine to determine accurate coordinate offsets for an RA and Dec offsets from the reference position.

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Detailed Description

ObitPosition module function definitions.

Utility functions for coordinates Adopted from XFITSview/FITSview which adapted from AIPS

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Function Documentation

gint ObitPositionWorldPos (  gfloat  pixel[2], ObitImageDesc *  desc, gdouble  coord[2] )

Public: Routine to determine accurate position for pixel coordinates. Does: -SIN, -TAN, -ARC, -NCP, -GLS, -MER, -AIT projections, anything else is linear Parameters: pixel  Pixel number (1-rel) on each axis desc  Obit Image Descriptor coord  [out] Coordinate value on each axis Returns: Pointer 0 if OK, else angle too large for projection

gint ObitPositionWorldPosLM (  gdouble  doff[2], ObitImageDesc *  desc, gdouble  coord[2] )

Public: Routine to determine accurate position for pixel coordinates from offsets from the reference position. Does: -SIN, -TAN, -ARC, -NCP, -GLS, -MER, -AIT projections, anything else is linear Parameters: doff  Coordinate offsets on each axis (deg) desc  Obit Image Descriptor coord  [out] Coordinate on each axis (deg) Returns: Pointer 0 if OK, else angle too large for projection

gint ObitPositionXYpix (  gdouble  coord[2], ObitImageDesc *  desc, gfloat  pixel[2] )

Public: Routine to determine accurate pixel coordinates for an RA and Dec offsets from the reference position. Does: -SIN, -TAN, -ARC, -NCP, -GLS, -MER, -AIT projections, anything else is linear Parameters: coord  Coordinate value on each axis desc  Obit Image Descriptor pixel  [out] Pixel number (1-rel) on each axis Returns: Pointer 0 if OK, else 1=angle too large for projection, 2 = bad values

gint ObitPositionXYpixLM (  gdouble  coord[2], ObitImageDesc *  desc, gdouble  doff[2] )

Public: Routine to determine accurate coordinate offsets for an RA and Dec offsets from the reference position. Does: -SIN, -TAN, -ARC, -NCP, -GLS, -MER, -AIT projections, anything else is linear Parameters: coord  Coordinate value on each axis desc  Obit Image Descriptor doff  [out] Pixel number (1-rel) on each axis Returns: Pointer 0 if OK, else 1=angle too large for projection, 2 = bad values

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