All,
Regarding mobile autotracking antennas for data services, see:
http://www.datrondbs.com/p4500RV.html or
http://www.datrondbs.com/p4500Marine.html
I believe Datron has also experimented with mobile Internet services using
these antennas.
Regards, mcm
Michael C. Maguire
email: [email protected]
-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of Andreas Timm-Giel
Sent: Tuesday, 03 October, 2000 22:38
To: [email protected]; [email protected]
Subject: AW: Moving Targets
<snip>
GEO systems are available serving your bandwidth requirements. However, if
you think of Ku/Ka-band systems, the antenna pointing is critical (in
particular with this speed). If you are looking for GEO L-, S-band systems
you could most get an autotracking antenna, which is fast enough for your
trains. However it is rather bulky (would assume around 1 m in diameter),
very much depending on the satellite you use. Additionally you would always
need a line-of-sight (difficult with tunnels). Second problem for L- and
S-band systems will be the prices for capacity on satellites (just as a
reference: Inmarsat takes around US$ 7 / min for a 64 kbit/s link)
<snip>
Andreas
--- ------------------------------------ Dr.-Ing. Andreas Timm-Giel MediaMobil Communication GmbH Fahrenheitstr. 1 D - 28359 BREMEN GermanyPhone: +49 (0) 421 20 10 088 Fax: +49 (0) 421 22 39 418
email: [email protected] ------------------------------------ <snip>
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