I think it may be time to put a dedicated communications satellite around Mars. These rovers do seem to last a long time so it probably would be worth it.
I'm not sure I understand. Gale Crater is pretty near the equator, so any equatorial satellite would pass quickly over it, but many many times per day.
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The bandwidth to the orbiters is up to 2 Mbps, but because they're in low orbit they're only in sight 8 minutes per day.
http://mars.jpl.nasa.gov/msl/mission/communicationwithearth/...
I think it may be time to put a dedicated communications satellite around Mars. These rovers do seem to last a long time so it probably would be worth it.
We would need at least three for constant contact, Arthur C. Clarke style.
There is, that's the role MSO is performing, no?
What you'd need is a whole series of them to increase coverage.
A bit of clarification, I think the orbiters are in sight of Earth for most of the day.
It is Curiosity that is not in sight of the Orbiters, again because of their low orbit.
I'm not sure I understand. Gale Crater is pretty near the equator, so any equatorial satellite would pass quickly over it, but many many times per day.
You answered your own question: both satellites are in polar orbits. They pass the equator many times a day, but at a different longitude each time.