[amsat-bb] Re: iPhone APP for Sat Tracking

Howard Long howard at howardlong.com
Tue Nov 11 15:23:08 PST 2008


The math got me too with the LVB Tracker 2 code. So I massaged the following
(with authors' permission) to squeeze into a PIC:

// PLAN13 algorithm:
// Copyright 1983-2005 James R. Miller G3RUH
// PLAN13 C port:
// Copyright 1997-2005 Edson Pereira N1VTN
// AOS/LOS algorithms: 
// Copyright 1992-2002 John Magliacane KD2BD

KD2BD's AOS/LOS code was taken from the Predict source. As the iPhone is a
massive device compared to a PIC, you could probably port Predict without
resorting to the starved memory scenarios of PLAN13. I still live in the old
days when memory was expensive, and the shoe horning of tight code and data
was a respected art. Many of us still wish that were the case while we wait
several minutes for our PCs to boot despite a thousand fold increase in CPU

73, Howard G6LVB

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Robert Liesenfeld
Sent: 11 November 2008 21:46
To: AMSAT-BB at amsat.org
Subject: [amsat-bb] Re: iPhone APP for Sat Tracking

On Nov 11, 2008, at 1:20 PM, Michael J. Wolthuis wrote:

> While we are on the subject, is there a specific APP for the iPhone 
> for Sat Tracking?  What are people using?
> Mike
> kb8zgl

This is something I'd love to have, but I've never seen one; I've considered
writing one (I'm an iPhone owner and I'm fairly well versed in Objective-C),
but the math kind of defeated me.  :-(  I may try to pick it up again when
I'm feeling ambitious.

-Robert, KC0KNM
Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

More information about the AMSAT-BB mailing list