From sUASNews:

If over the horizon satellite communications are a requirement you are in luck! An Outback Challenge team from Holland just helped you out.
For participation to the the team had to design a cheap and light weight iridium satellite communication module for there
As there is huge interest from the UAV community in using light weight and reliable satellite communication the made the iridium development open-source so the UAV community can benefit from this achievement.
For the opensource hardware and software see:

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