Bruce, That would be cool, an HT that tells you where the bird is!
Sign Me Up! Joe kk0sd -----Original Message----- From: Bruce Robertson [mailto:ve9...@gmail.com] Sent: Monday, July 26, 2010 7:23 AM To: Gary Joe Mayfield Subject: Re: [amsat-bb] Re: video: program to burn TLEs onto doppler-tuning microcontroller Thanks, Joe -- I guess an important distinction is that the trakbox did rotor control, and my project doesn't. Rather, it aims to be useful to a person in the field using hand-held equipment. In fact, ultimately, I'd like to see code like this built into the firmware of an HT like the TH-D7A. 73, Bruce VE9QRP On Mon, Jul 26, 2010 at 12:45 AM, Gary "Joe" Mayfield <gary_mayfi...@hotmail.com> wrote: > Cool! Trakbox lives again!!! > > 73, > Joe kk0sd > > -----Original Message----- > From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On > Behalf Of Bruce Robertson > Sent: Sunday, July 25, 2010 8:51 PM > To: AMSAT-BB > Subject: [amsat-bb] video: program to burn TLEs onto doppler-tuning > microcontroller > > Some of you know about my qrptracker project, which is aiming at a > compact, microcontroller-based doppler tuning device for use in the > field. My previous videos showed an FT-817 controlled by this device > and using a small speaker and CW to announce the bird. I've just > posted a video to YouTube at http://www.youtube.com/user/VE9QRP that > demonstrates the program that is used to load TLEs into the > microcontroller, sync the tracker, etc. It also shows the > microcontroller tuning a TH-D7A handheld, and it shows a LCD display. > My goal now is to make an altoids-tin-sized package that connects to a > TH-D7A or an FT-817, has an LCD display and provides doppler tuning. > > In further developments in this project, I've worked on porting the > SGP4 algorithm to the ATMega644p. (Currently the project uses the > Plan13 algorithm.)It's not an exact port, since the 'double' data type > is not the same length, but with some careful hand-crafting, we're > getting accuracies down to 1/10th of a degree lat and long. > sub-satellite point. > > 73, Bruce > VE9QRP > > -- > http://ve9qrp.blogspot.com > _______________________________________________ > Sent via amsat...@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 > > _______________________________________________ > Sent via amsat...@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 > -- http://ve9qrp.blogspot.com _______________________________________________ Sent via amsat...@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