We played a major role in developing this EU satellite, but if we leave the EU is threatening to stop us using it for GPS, mobile phones, military use etc.
Our Government has said that they'll create their own if this threat is carried out, but it's going to cost us a lot more money if we do.
From a purely financial point of view, this is a downside to leaving:
https://www.politico.eu/article/brex...with-brussels/