[Chugalug] Satcom

Stephen Kraus ub3ratl4sf00 at gmail.com
Wed Jun 26 01:02:22 UTC 2013


For instance, we actually have a phone on the plane. A good old fashioned
phone. If someone sees something interesting, they actually call someone
and say 'Hey, I saw such and such, I'm sending it your way for analysis'


On Tue, Jun 25, 2013 at 8:59 PM, Stephen Kraus <ub3ratl4sf00 at gmail.com>wrote:

> 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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>>>
>>
>>
>
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