Kepler's 2nd. Law

[Ángel Martin]

(03-11-2018 01:45 PM)twdeckard Wrote:  I’ve been working on a package to determine real time altitude and azimuth from a satellites two-line-elements. I am hopelessly mired in the coordinate transformations.

I posted a copy of a ham radio article from ORBIT that does the same, but it wasn’t as enamored with the advantage module as I am.

It is a fun exercise to point out visible objects like the ISS and the Humanity Star and I have a working arduino version which points an antenna array.

https://youtu.be/VG5L5oP2uNk

As a conceit I have thought about plumbing an HP-IL/RS232 to it to place the ‘41 in charge. With the single precision math of the arduino the orbital elements age very quickly.

https://github.com/twdeckard/HP41CX-PLAN...PLAN41.rpn
(the only thing salvageable in the code would be the keps parser)

that sure looks like serious skills at work, very impressing!

I hope you don"t set your expectations too high, the ROM is quite basic in contents and doesn't delve deep into the subjects - more of a personal past-time than any other thing.

BTW would you rather have your program in a ROM format? I can transfer it to ROM if that makes any sense to you...

Best,
ÁM