ub3ratl4sf00 at gmail.com
Wed Jun 26 00:59:16 UTC 2013
You have to realize (and I can only talk about non-classified non-INFOSEC
stuff) that the JSTARS is just one big mobile observation post with IFF. It
feeds ground troops valuable targetting and recon data, yes, but at the
same time it sends anything it thinks is pertinent back to the DoD for
further analysis, and it has to be able to feed this info steadily over a
Satellite connection anywhere in the world. And from the size of the RAID
arrays on the plane, you can assume its sending some pretty massive files.
On Tue, Jun 25, 2013 at 8:50 PM, Stephen Kraus <ub3ratl4sf00 at gmail.com>wrote:
> Our SATCOM system utilizes basically two satellite channels to achieve
> ISDN capability (two 64 kb pipes) so that imagery data can be fed back to
> whoever wants it. This was our old system, via INMARSAT of Britian.
> We have a new SATCOM system, and I don't even have a clue of its
> throughput yet, but its going to be better.
> On Tue, Jun 25, 2013 at 8:46 PM, Mike Harrison <cluon at geeklabs.com> wrote:
>> Slightly off topic, but the SATCOM stuff the Air Force has is amazing.
>> Steven, What can you link to or share without fear of giving away
>> national secrets, impuning the NSA.. etc..
>> I'm interested in many ways... for example, I know we have a utility in
>> W. Africa using Sat coms to use Juice and are impressed with how it works
>> in a high latency environment. I know they are on 64k links with 150ms to
>> 300ms round trips.
>> From memory: 64k might be expressed as one half an ISDN connection,
>> ISDN is 2 B's (64k each) and a D or lower rate data/signalling channel.
>> Multiple B's (64k) can be bonded together for aggregate bandwidth
>> with that D (data) channel providing sync and bonding info.
>> I can see where that same structure could be used for any communications
>> medium, just kind of suprised that it is. I'd like to know what the useful
>> typical limits are in the military variations.
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>> Chugalug at chugalug.org
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