# How could a private organization ensure access to communications with a deep space probe or rover?

Regarding a private organization what would be there options for communication with a probe or rover in deep space such as Mars or farther. Would they be able to use the Deep Space Network? If so what would be the fee? What would their other options be?

SpaceX is said to be in negotiations with NASA to use the DSN for their first Mars missions. I haven't seen cost figures for that.
A new dish antenna of the type used by the DSN (34 m diameter) costs on the order of $50M. SpaceX would need 3 for continuous coverage. • \$150M? Compared to all the other costs, that's not that much. Of course, you also need three good places to build them. – a CVn Nov 21 '16 at 19:55
• Yeah, well, as Hobbes hinted at, building up and operating the DSN isn't exactly free for NASA / the US government, so they probably won't give away access to private companies for free. – Marcus Müller Nov 21 '16 at 20:05
• Don't forget "continuous coverage" doesn't mean "fail-save coverage". I'd assume they'd want to have enough stations to still operate if one fails. – Marcus Müller Nov 21 '16 at 20:06
• you only need one station if you add (at least) 3 satelites in geosyncronus earth orbit. Station talks to the satelite above it, the satelite talks to the other two, the satelite who can see mars sends/recives the message. – m.fuss Nov 22 '16 at 12:54
• @m.fusd unlike KSP, you actually need huge antennas. Satellite won't do it – Antzi Nov 22 '16 at 13:40

One alternative is laser communications. You could have much smaller and more affordable apertures on Earth, e.g. a meter, as well as on the spacecraft, for the same data rates. However you would then need to keep the spacecraft and its laser pointed very accurately to get any data at all. If for some reason there is a failure that results in the spacecraft not being able point its laser to your light bucket on Earth, then it's game over.

• True; it's not like we can fall back to an omnidirectional laser the way we can fall back to a low-gain antenna for backup communications when there is a problem with aiming of the high-gain antenna. Or, well, perhaps we could, but it would be about as viable as lighthouses in space as discussed on Worldbuilding. – a CVn Nov 23 '16 at 12:44

The DSN Mission Support Definition lists NASA, other government agencies and international partners as customers (slide 3). The cost structure is depicted on slide 18ff, aperture fee is one of the variable items. Looking at the Mission Service Policies, I would also expect considerable project costs before you exchange the first bit of telemetry with your craft.

Other agencies have their own networks. ESTRACK, ESAs network, also has quite an impressive list of sites.

At the other end of the spectrum, there are numerous sites with swivel mounted (smaller) dishes, that will work perfectly for deep space, depending on link budget. AMSAT for example is a primary user of the Bochum Radio Observatory (a private initiative!). They were able to receive STEREO telemetry at Bochum, in fact they even helped NASA with the implementation of turbo codes for this mission. AMSATs mars mission P5A is planning to use this dish. I would bet you get some communication time in Bochum if you help to fund P5A.