What? No talk about the Mars Rover?

[geoschmo]

Originally posted by David E. Gervais:
I was thinking, if they had a permanent satalite in orbit around mars, the future landers could save on payload by using it as a relay to send info back to earth. That way they wouldn't need such big bulky transmitters. The space could be used for more scientific equipment.

Just a thought, Cheers!

There are several permanent orbitting sattelites areound Mars. I am not sure but I suspect they can relay Messages in a pinch. To do that for all the communications isn't that efficent I don't think though. It's easier for the rover to track in on the Earth far away then to track a sattelite whipping about in a close mars orbit. Especially since the orbiters useally go into a polar orbit to make coverage of the entire planet easier. Your windows of communication would be much smaller than with direct comm back to earth. The limiting factor in bandwith isn't the transmitting power as much as it is the line of sight window. Unless you put the mars orbitter in a geo-synch orbit, and then it's not much good for anything but relaying Messages, which is an aweful waste of resources.

With a big enough antenna on Earth you could probably pick up a transmitter on mars not much bigger then a cell phone.

Geoschmo
I'm not a sattelite communications expert, but I play one on tv...

[ January 09, 2004, 11:57: Message edited by: geoschmo ]