Celestial Precomputation

Warning: I found an error if the DR position is on the southern hemisphere. The PUB249 pdf files did not show this error and are correct (as far as I checked). All Revisions 8+ and the Windows release have been fixed.

This Python TK application calculates a good set of stars for a 3 star fix, makes all calculations similar to the FAAs Celestial Computation Sheet (see FAA doc FAA-H-8083-18).

Also, you can create a PDF file that generates Pub 249 Vol 1 for any epoch you specify.

The PUB249 as PDF is found under "Files".

I wrote this for my aircraft bubble octant :-)
It is mainly useful for air navigation as it assumes a bubble sextant but may be used for normal sextants as well.

Requires Ephem and ReportLab (optional for PDF output)

Not to be used for real-world navigation!