Shaun:
USA, Japan and Europe have been doing substantial R&D on High Altitude
Platform Station (HAPS) in recent few years. The technical contributions
from these R&D sources to ITU-R WP8F/TG8/1 in the last two years have
resulted in a Preliminary Draft New Recommendation (PDNR) and a Draft
Handbook on HAPS in ITU-R WP8F working on the Third Generation (3G) wireless
technologies and beyond. Therefore, HAPS is a serious project and technology
to consider. Each platform is at about 21 Km above the ground and can cover
a very large area.
Sing Lin
-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of [email protected]
Sent: Sunday, October 08, 2000 11:46 PM
To: [email protected]
Subject: Re: Moving Targets
How about a small constellation of satellites in a highly inclined orbit
(HEO?).
Should
be much cheaper than a LEO constellation though more difficult to manage. I
understand
the Russians use these pretty effectively.
-Abheek
"Dani I. Widjanarko" <[email protected]> on 10/03/2000 05:33:57 AM
Please respond to "Dani I. Widjanarko" <[email protected]>
To: [email protected]
cc: (bcc: Abheek Saha/HSS)
Subject: Re: Moving Targets
I don't think that LEO is a good solution, may be you can try to use HAPS
(High Altitude Platform System) that now being explored by many countries.
-dani-
-----Original Message-----
From: [email protected] <[email protected]>
To: [email protected] <[email protected]>
Date: 03 Oktober 2000 2:50
Subject: Moving Targets
>Hi,
>
>I'm doing a research project about providing Internet access to moving
>targets on the eastern seabord of Australia. In this case, the moving
>targets are trains.
>
>We really need to provide around 1MB or so downstream, maybe 56k or so
>uplink. I've been doing a lot of searching but facts seem to be hard
>to come by.
>
>By my reckoning something like a link to an LEO constellation is
>needed to make this work because:
> - GEO satellites can't easily provide this type of bandwidth
> - GEO satellites require reasonably large dishes and need to
>fairly precisely targetted at the sat
> - Line of sight is needed for GEO links to work
>
>Basically, I'm hoping that with LEO links a dish won't even be
>required, some sort of antenna? Do any of the currently existing LEO
>constellations provide this sort of service? Future ones?
>
>Am I completely barking up the wrong tree here? Is there a better way
>of providing reasonably high speed internet access to moving vehicles
>without cabling etc.
>
>Thanks in advance,
>Shaun
>
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