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Robert C. Byrd Green Bank Telescope

NRAO Green Bank

Richard M. Prestage

November 8th, 2001
GBT Software Project Note 15.1

GBT Astronomical Position Handling

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Abstract:

This document summarises the different sorts of astronomical co-ordinates supported by the GBT, the transformations which are supported, and how the co-ordinates are stored in the GO and Antenna FITS files.

Introduction
Co-ordinate systems and transformations
- Space motion and FK4 to FK5 conversion
- Disabling co-ordinate corrections
GO Input Coordinate Systems
- Representation in the GO FITS file
Antenna Indicated Positions
- Upstream co-ordinate conversions and metrology corrections
- Representation in the FITS file
Acknowledgements
About this document ...

Bob Garwood
2011-07-25