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https://github.com/daniestevez/gr-satellites

GNU Radio decoder for Amateur satellites
https://github.com/daniestevez/gr-satellites

ccsds decoder fec gnuradio satellite sdr telemetry

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GNU Radio decoder for Amateur satellites

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README 

        
# gr-satellites



[![GitHub release (latest by date)](https://img.shields.io/github/v/release/daniestevez/gr-satellites)](https://github.com/daniestevez/gr-satellites/releases/latest)

[![Conda](https://img.shields.io/conda/v/conda-forge/gnuradio-satellites)](https://anaconda.org/conda-forge/gnuradio-satellites)

[![Read the Docs](https://img.shields.io/readthedocs/gr-satellites)](https://gr-satellites.readthedocs.io/)

[![GitHub license](https://img.shields.io/github/license/daniestevez/gr-satellites)](https://github.com/daniestevez/gr-satellites/blob/main/LICENSE)



gr-satellites is a GNU Radio out-of-tree module encompassing a collection of

telemetry decoders that supports many different Amateur satellites. This

open-source project started in 2015 with the goal of providing telemetry

decoders for all the satellites that transmit on the Amateur radio bands.



It supports most popular protocols, such as AX.25, the GOMspace NanoCom U482C

and AX100 modems, an important part of the CCSDS stack, the AO-40 protocol used

in the FUNcube satellites, and several ad-hoc protocols used in other

satellites.



This out-of-tree module can be used to decode frames transmitted from most

Amateur satellites in orbit, performing demodulation, forward error correction,

etc. Decoded frames can be saved to a file or displayed in hex format. For some

satellites the telemetry format definition is included in gr-satellites, so the

decoded telemetry frames can be printed out as human-readable values such as bus

voltages and currents. Additionally, some satellites transmit files such as JPEG

images. gr-satellites can be used to reassemble these files and even display the

images in real-time as they are being received.



gr-satellites can be used as a set of building blocks to implement decoders for

other satellites or other groundstation solutions. Some of the low level blocks

in gr-satellites are also useful for other kinds RF communications protocols.



## Documentation



gr-satellites [documentation](https://gr-satellites.readthedocs.io/) is hosted in

[reathedocs.io](https://readthedocs.io/).



## Releases and branches



Currently there are the following series of releases in the history of

gr-satellites:



* `v5.x.y` is the current release series, and supports GNU Radio 3.10.



* `v4.x.y` has the same functionality as the v5.x.y series, but supports

  GNU Radio 3.9 (until v4.6.0, the v4.x.y series supported both GNU Radio

  3.9 and 3.10).



* `v3.x.y` has the same functionality as the v5.x.y series, but supports

  GNU Rado 3.8. This series was the result of a large refactor that

  introduced a lot of new functionality and improvements.

  The refactor started on September 2019 and was finished in May 2020.

   

* `v2.x.y` is a series of releases compatible with GNU Radio 3.8 that existed

  between September 2019 and May 2020. The functionality in this series is

  equivalent to the `v1.x.y` series.



* `v1.x.y` the original series of releases, which was compatible with GNU Radio

  3.7. Development in this series stopped on September 2019 with the appearance

  of the `v2.x.y` line, but some bugfix releases have been published afterward.



The repository is organized in the following branches:



* `main` is where the active development happens. From time to time, features

  will be frozen in a new release. This branch is compatible with GNU Radio 3.10.



* `maint-3.10` is the branch where releases in the current `v5.x.y` line are

  published. This branch is compatible with GNU Radio 3.10.



* `maint-3.9` is the branch where releases in the current `v4.x.y` line are

  published. This branch is compatible with GNU Radio 3.9.



* `maint-3.8` is the branch where releases in the current `v3.x.y` line are

  published. This branch is compatible with GNU Radio 3.8.



* `maint-3.8-v2` is the branch where releases in the `v2.x.y` line were

  published. This branch is compatible with GNU Radio 3.8. No changes

  happen in this branch any longer.



* `maint-3.7` is the branch where releases in the `v1.x.y` line were

  published. This branch is compatible with GNU Radio 3.7. No changes happen

  in this branch any longer.



In general, pull requests should be submitted to `main`.



## Installation



The installation procedure of gr-satellites is roughly the usual of a GNU Radio

out-of-tree module. Detailed instructions about the required dependencies and

how to build and install gr-satellites are given in the

[documentation](https://gr-satellites.readthedocs.io/).



## Support



Support for gr-satellites is handled only through

[Github issues](https://github.com/daniestevez/gr-satellites/issues)

and [Github discussions](https://github.com/daniestevez/gr-satellites/discussions)

so that the whole community can benefit, rather than through private

channels such as email. Please understand this when asking for support.

Take a look [here](https://github.com/daniestevez/gr-satellites/discussions/304) to

check whether a new topic fits better in the issues page or in the discussions page.



## Satellite teams



Satellite teams interested in using gr-satellites for your groundstation

solution, please read

[this note](https://github.com/daniestevez/gr-satellites/blob/main/satellite_teams.md),

especially if you will be using Amateur radio spectrum.



## Commercial satellites



[This note](https://github.com/daniestevez/gr-satellites/blob/main/commercial_satellites.md)

describes the policy of the gr-satellites project with respect to code

contributions that add support for commercial satellite missions.



## CCSDS TM and TC Space Datalink and SpacePacket blocks



Athanasios Theocharis made under ESA Summer of Code in Space 2019 a collection

of blocks covering several CCSDS blue books. The documentation for this blocks

can be found in

[CCSDS_README.md](https://github.com/daniestevez/gr-satellites/blob/main/CCSDS_README.md).