Extending Earth's Internet to Mars With Orbital Data Servers - by BrianKoberlein
There are two main challenges in providing Internet connectivity to Mars. The first is simply bandwidth. You can’t lay fiber from Earth to Mars. You have to transfer data back and forth by radio. At present, our communication to Martian satellites and rovers is done by the Deep Sky Network , which is a collection of large radio antennas across the globe. But the DSN is already being pushed to its limit, and we haven’t even had a crewed mission to Mars.
This latest work looks at what it would take to have an edge computing network around Mars. The key is not only to have data locally accessible, but also to have a certain level of redundancy. So they propose building a constellation of satellites around Mars. Their system would have 9 satellites each in 9 orbital planes, for a total of 81 satellites. As with many constellations, the satellites would communicate with each other to have redundant backups of data.
Building such a system would not be cheap, so the authors propose building the constellation in stages. As exploratory missions to Mars lay the groundwork for crewed landing, a few constellation satellites could go along for the ride. By the time long-term stations are being built, the constellation could already be in place.Reference:
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