Top > Science > Astronomy > Ephemeris

Ephemeris - Reads, writes and interpolates planetary positions using JPL's ephemeris files

'Ephemeris' reads, writes, and interpolates the JPL planetary ephemeris data that is the world standard planetary dataset. It should compile on any machine that uses gcc and supports IEEE floating point arithmetic, and has been tested under Linux. It uses an included library, gnulliver.c, that automatically handles integer and floating point Big-endian/Little-endian byte swapping to match Big-endian/network order on any computer. gnulliver.c can be used separately under the LGPL 2.1.

This is a redesign of JPL's original FORTRAN code, available on JPL's FTP website (ftp://ssd.jpl.nasa.gov/pub/eph/export/), with some added flexibility (including patching some inconsistencies in the original JPL data files). 'Ephemeris' is not associated with JPL or NASA, but just uses JPL's data.

Obtaining

Web pagehttp://www.ephemeris.com/software.html
Source tarballhttp://www.ephemeris.com/ephcom-1.0.tar.gz
Version 1.0 (beta) released on 2004-05-22
Licensed under LGPLv2.1.
This is not a GNU package.

Documentation

User README included and available from http://www.ephemeris.com/README.txt
Support contacts

Announce List<mystars@ephemeris.com>
Help List<bugs@ephemeris.com>
Developer List<bugs@ephemeris.com>
Bug List<bugs@ephemeris.com>
Bug Databasehttp://www.ephemeris.com/software.html

Project contacts

Maintainers
Developers

Related information

Interfaceslibrary
Programseph2eph, eph2asc, asc2eph, ephcmp, headcmp, testeff, ephcoeff, vtransit, gnulliver.c
Source languagesC
Build prerequisitesmake
Related programsPlanet Finder

Entry information

License verified byJanet Casey <jcasey@gnu.org> on 2004-05-24
Entry compiled byJanet Casey <jcasey@gnu.org>

Categories


The copyright licensing notice below applies to this text. The software described in this text has its own copyright notice and license, which can usually be found in the distribution itself.

Copyright © 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.

Permission is granted to copy, distribute, and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of this license is included in the file COPYING.DOC.

Please report any problems in this page to bug-directory@gnu.org, or find out how you can help fix them.

The FSF provides this directory as a service to the free software community. Please consider donating to the FSF to help support this project.