Interesting OpenSource project that use only a simple RaspberryPI 0 as DVB-S transmitter + RTL-SDR dongle as receiver.
This is less expensive DVB-S trasmitter ever developed.
All the project is by Evariste he is a great developer and member of HAM Radio community ... now we are working togheter to a revision of system with low latency that fit the requirment of drone community .... now the latency is 2.5 second could became 200 ms with a power ampli for real use in outdoor scenario. If some one would join to beta testing of the system are welcome :)
This is the github where you can found the source code of the project .https://github.com/F5OEO/rpidatv
The receiver is an RTL-SDR standard dongle available on store like amazon or ebay for price less 30 $ . The decode is done using SDR technology the software from decoding is from Pabr the name is leandvb . This is the link .
This software decode DVB-S directly from rtl-sdr stream. It's impressive :)