SATCON2 Algorithms Working Group Report ← SATCON2 Algorithms Working Group Report ( 2021 ) → related portals : Astronomy 3892902 SATCON2 Algorithms Working Group Report 2021 SATCON2 Algorithms Working Group Report Authors Jonathan McDowell Harvard & Smithsonian; Chair USA Rob Seaman University of Arizona: Vice-Chair USA Cees Bassa Astron NL David Galada Enriquez Calar Alto ES Olivier Hainaut ESO DE Courtney Hodgson The University of Texas at Austin USA Matt Holman CfA USA Moriba Jah The University of Texas at Austin USA JJ Kavelaars CADC UBC CA Keith Poletti Texas USA Morgan Schmitz Princeton/Vera C. Rubin Observatory USA Pat Seitzer UMich USA Jan Siminski ESA DE Rachel Street LCO USA Hossen Teimoorinia CADC CA Heidi Thiemann OpenU UK Connie Walker NSF’s NOIRLab; SATCON2 Co-Chair; Ex-officio WG Member USA Table of Contents Introduction 1 1. General Software Considerations 4 1.1. Distribution and Documentation 5 2. Test Data Suite 5 2.1. Image test data for TrailMask 5 2.2. Satellite pass test data for PassPredict 6 2.3. Other Test Data 6 3. Software projects 8 3.1. SATCON1 recommendation 1: TrailMask 8 3.2. SATCON1 recommendation 2: PassPredict 15 3.3. SATCON1 recommendation 3: Simulation Tools 23 4. Implementation Timescale 29 5. Cross-Group Coordination 30 6. Conclusions 31 References 33 Appendix A: Ephemeris file formats 35 1.1 File formats 35 Appendix B: Glossary of Abbreviations 37 Acronyms & Abbreviations 39 Introduction This report is part of a collection of Wo
PICE software reads JPL
planetary ephemerides in a machine-independent binary format (kernels) which
are available from the SPICE web site and from
https://ssd.jpl.nasa.gov/ftp/eph/planets/bsp/ .
The JPL planetary ephemerides are also available in an ASCII format which are
converted by the user to machine-dependent binary files for reading.
The ASCII files are created in blocks of 20 or more years. Later ephemerides
tend to be stored in longer blocks. When converted into binary format,
the files can be merged to span a longer time if desired.
The ASCII files are available from
https://ssd.jpl.nasa.gov/ftp/eph/planets/ascii/ .
The ascii file format is briefly described in the file
https://ssd.jpl.nasa.gov/ftp/eph/planets/ascii/ascii_format.txt .
The machine-dependent binary files differ mainly in the binary representation
of numbers. The 'little-endian' representation is used by Intel x86, IA64 or
Alpha based processors (and their clones). Some binary ephemeris files are
available in this format from https://ssd.jpl.nasa.gov/ftp/eph/planets/Linux/ .
The 'big endian' representation is used by PowerPC and SPARC processors.
Some binary files in this format are available from
https://ssd.jpl.nasa.gov/ftp/eph/planets/SunOS/ .
Fortran programs for converting the ASCII files and for merging and reading
the binary files are available from
https://ssd.jpl.nasa.gov/ftp/eph/planets/fortran/ .
These Fortran programs generally require some tailoring by the user.
Instructions for using these programs are available for downloading from
https://ssd.jpl.nasa.gov/ftp/eph/planets/fortran/userguide.txt .
Other programs for reading these formats have been developed independently by
outside programmers, and not suported directly by JPL, are listed at
https://ssd.jpl.nasa.gov/ftp/eph/planets/other_readers.txt .
AVAILABLE EPHEMERIDES
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DE102 : Created September 1981; includes nutations but not librations.
Referred to the dynamical equator and equinox of 1950.
Covers JED
Everything we examined (2)
This check searched the claim as stated. It did not run a separate search for evidence against it.