ARISS DVB-S Receiver
After recent success in receiving the ARISS DVB-S TV Downlink from the International Space Station, I decided to have a go at building my own setup.
Latest (v0.3b): vivadatv (registration required)
There are several kits out there for amplifiers suitable for this, with performance scaling with price.
My plan is to build a 2.4GHz feed (helix or patch) for an ebay satellite dish.
Adjacent-channel interference from 2.4GHz Wifi will be a significant problem. I may try shrouding the dish and feed to reduce sidelobes if this proves to be an issue.
I have got preliminary permission to borrow G3KMI's Yaesu G-5500 Az/El rotator while it waits for their installed mast to be approved.
This will allow me full automatic Pointing
The G-5500 has a manual control unit, with switching interface on the back. The classical approach is to use a Yaesu Interface Unit, or clone such as the K3NG Rotator Controller to present a common serial interface to the PC.
The classical approach however uses Azimuth+Elevation, with a bodge to allow the antenna to 'flip-over'. A far more elegant approach for LEO tracking would be to implement X/Y control, where zenith is 0,0. I will have a go at constructing the control electronics and software required for this.
Work in this area may also be relevant to the University's Cubesat Groundstation, that I am assisting with the construction of.