Archive for category: Amateur Satellite

Increasing pyephem’s accuracy for satellite rise/set calculations…

March 8, 2015 | Amateur Satellite, Amateur Science, Python | By: Mark VandeWettering

A few years ago, I created my own Python implementation of the Plan13 satellite prediction code written by James Miller (G3RUH). The Plan13 algorithm isn’t very complicated: you can easily run it on processors like the Arduino (in fact, I used it for my ANGST satellite tracker) But somehow, I managed to misplace the source […]

Digital ATV resources…

April 1, 2014 | Amateur Radio, Amateur Satellite | By: Mark VandeWettering

I’ve been doing a bunch of reading about digital ATV operations lately. I was originally motivated by hearing about the HamTV project aboard the ISS. Back in 2007, I got re-energized into ham radio by learning that for the 50th anniversary of Sputnik, the amateur satellite AO-51 would broadcast a cool message that I heard […]

Building a distributed satellite ground station network (or not…)

January 3, 2012 | Amateur Radio, Amateur Satellite, Hacking, Rants and Raves | By: Mark VandeWettering

My twitter intro says that I am an “enthusiast for enthusiasm”. When I wrote that, it was simply because there are some questions that I really think aren’t helpful at all. Questions like: Why didn’t you just buy X instead of building your own? Didn’t somebody do that years ago? Why are you playing with […]

ANGST: the Arduino n’ Gameduino Satellite Tracker

November 13, 2011 | Amateur Radio, Amateur Satellite, electronics, My Projects | By: Mark VandeWettering

I’ve stopped hacking on my Arduino/Gameduino satellite tracker for now. Here’s the final video demonstrating it running: I’m currently working on the final schematic which will be posted on this permanent page. The code will be available github.com, for right now, it includes the library that I wrote that does the satellite prediction. I’ll be […]

What’s Up: A Visual Database of Satellites and Debris

October 20, 2011 | Amateur Satellite | By: Mark VandeWettering

I’ve pondered creating something like this a bunch of times: a way to visualize all the satellites currently in Earth orbit. Somebody beat me to it, using Google Earth and a .kml file. It’s pretty astounding just how packed low earth orbit is, and it’s cool to check out the band of geostationary satellites as […]

Still more on my Arduino/Gameduino Satellite Tracker…

October 8, 2011 | Amateur Satellite, Arduino, Gameduino | By: Mark VandeWettering

I need to think up a better name for this project. Calling it the “Arduino/Gameduino Satellite Tracker” is just too damned cumbersome for words. Progress was slow today. I woke up around 4:00AM with a sore throat and a miserable cough. A quick trip to the urgent care clinic when it opened reassured me that […]

Scrappy introduces my Arduino/Gameduino Satellite Tracker

October 7, 2011 | Amateur Radio, Amateur Satellite, Arduino, Gameduino, My Projects | By: Mark VandeWettering

My cat Scrappy decided it was time to film a brief progress video of my Arduino/Gameduino satellite tracker. I completed the basic port and testing of my Plan13 implementation to C++ for the Arduino, and got it running pretty well. It doesn’t seem to be much more compact than Bruce Robertson’s qrpTracker code, but it […]

More progress on the Arduino/Gameduino satellite tracker…

October 5, 2011 | Amateur Radio, Amateur Satellite, Arduino | By: Mark VandeWettering

Okay, I got about half of the Plan 13 code ported to C++. It’s a fresh port of the original BASIC code, but modularized into objects better, and with a few bits of tidiness that C++ provides over basic. I estimate another hour or so to finish the code, if I work carefully and efficiently. […]

ISS tracking on the Arduino/Gameduino

October 4, 2011 | Amateur Radio, Amateur Satellite, My Projects | By: Mark VandeWettering

Well, tonight I had some mild success! My Gameduino satellite tracker is up and running! It’s not got much in the way of a user interface, but it here you see the ISS position marked with a purple/magenta dot, and then dots showing the position of the ISS every three minutes for the next two […]

Homemade GPS Receiver

October 1, 2011 | Amateur Radio, Amateur Satellite | By: Mark VandeWettering

This article was linked from hackaday, and seems very, very cool. Sure, GPS receivers are cheap, but building one is cool. I am not likely to be doing a project like this, but it’s cool to read about. Homemade GPS Receiver.

Thoughts on SSTV…

September 19, 2011 | Amateur Radio, Amateur Satellite | By: Mark VandeWettering

My recent playing with SSTV images coming from ARRISSat-1 have made me think a bit more about SSTV. I used two different applications to decode SSTV images (MMSSTV on Windows, and Multiscan on OS X), and got slightly different results in terms of performance from each. This leads me to ask “just what are the […]

NOAA 19 recording, and atpdec…

September 14, 2011 | Amateur Radio, Amateur Satellite | By: Mark VandeWettering

Some of you may remember that I wrote my own APT satellite decoder. I ran across someone else who did the same: ATPDEC by Thierry Leconte (F4DWV) It has the same basic philosophy as my own crude efforts: hand it a WAV file, and it will find and produce the APT imagery from inside it. […]

Morning ARISSat-1 SSTV

September 11, 2011 | Amateur Radio, Amateur Satellite | By: Mark VandeWettering

I overslept this morning, and woke up a scant 10 minutes before this morning’s good pass of ARISSat-1 was to begin. Still, all I had to do was go out to my car, grab my Arrow, and my HP laptop, and my trusty VX-3R, and I should be able to make it. I started pulling […]

On ARISSat-1 SSTV images…

September 8, 2011 | Amateur Radio, Amateur Satellite | By: Mark VandeWettering

I’ve been trying to get out and record more ARISSAT-1 passes, in the hopes of getting some nice SSTV images. If you follow @brainwagon on twitter, you are likely to see some of the more mundane images that I’ve been getting thusfar. I keep hoping to snag some truly great ones, but thus far, the […]

More ARISSat-1 recordings…

September 2, 2011 | Amateur Radio, Amateur Satellite | By: Mark VandeWettering

Got a short recording of ARISSat-1 this evening. Not 100% sure, but it may have transitioned into low power mode at the end of this recording, I seemed to lose carrier and couldn’t reacquire the satellite. In any case, here’s the recording, and the one decoded SSTV image (not too exciting, but pretty clear). ARISSat-1 […]