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This architecture implements the COTS DVB-S2 standard for high definition digital video and transmits in the 23cm band (1.3 GHz). Copenhagen Suborbitals saw a very stable link at 3.5W RF at 10km altitude.
WIP Idea
From a discussion between Charlie and Dennis.
HAM radio people use the DVB-T or DVB-S protocol for DATV (digital amateur TV) in Europe and in US (e.g. https://batc.org.uk/). There are commercial products which encode a hdmi picture and send it out over a DVB-T channel.
A device which we could use would be this one: http://www.hides.com.tw/product_HV320_eng.html (there are multiple available, unclear what kind of different features they offer).
Rocket Inventory:
- 3x Raspberry Pi 0 with camera
- HV320 without PA (or equivalent model)
- PA (e.g. https://www.minikits.com.au/70cm-7W-Amplifier)
- Antenna
Groud Station
- Notebook
- USB Receiving Adapter (e.g.http://www.hides.com.tw/product_ut120_eng.html)
- Antenna
Things to discuss:
- Frequency? (D: I would prefer 70cm/440MHz, easier to get PAs and is less problematic in regard to doppler)
- Bandwith? (HAMs usually use 2.4 MHz, commercial products use 5-8 MHz)
- Power? (run the PA+Modulator all the time or only at timeslots)