🚀 go-pugleaf

Hi,

We are performing a demonstration of robotic technologies for NASA in
summer 97.  It involves a robot operating (hands-off operation) in a
dessert for 2 months.  This is to demonstrate some key technologies
necessary for planetary (Moon, Mars) exploration missions.  The
demonstration will last for 2 months and will involve participation
from students and scientists all over the world where they will be
able to operate the robot and do experiments over the internet.  The
robot also carries a panospheric camera and the imagery will be used
for telepresence.

I am looking for information on wirless modems that will be able to
operate over the range of 3-4 miles.  The idea is to transmit to a
nearby satellite van and then transmit to a remote control station
through satellite links.  Because of the high quality imagery our data
rates are pretty high.  We would like to achieve about 4 Mbps through
combination of modems.  One of the biggest problem is that since the
robot is moving all the times in natural terrain achieving LOS is
difficult.  So for atleast data part we want non-LOS link.  We were
looking into using 3 Arlan 640s or an Arlan 640 + a cylink but all of
these are LOS.  Also with omni antennas they give range of less than a
mile.

I would appreicate any information on modems or any suggestions for 
this problem. I am not a regular reader of bboards so please send 
an email to me.

Thanks a lot

Deepak
-- 
| Deepak Bapna                   |    Phone:                 |
| Field Robotics Center          |    (412) 441-0984 (Res.)  |
| Carnegie Mellon University     |    (412) 268-7414 (Work)  |
| Pittsburgh, PA 15213           |    (412) 268-5895 (Fax )  |
|              Email: deepak@ri.cmu.edu                      |

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