Robert:
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 MIPS.
73, Howard G6LVB
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Robert Liesenfeld Sent: 11 November 2008 21:46 To: AMSAT-BB@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@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