[Scan-DC] Tigers A/A freqs

[Shawnerz]

CA,
Yes, from what I understand, phone number switching is
done at ground based, central offices.  However,
getting the call from the mobile (or in this case,
airborne) handset to the ground is done over the Low
Earth Orbiting (LEO) Iridium satellites.
Iridium has been used many times in military aircraft.
 For example, you typically can get a signal if you're
near the window, just forward of the navigator and
behind the copilot on a C-130.  Motorola even makes
some suction cup, stick on antennas for airplane
windows.
There typically is a lot of delay over Iridium.  And,
the call setup time is on the order of 15 seconds.
This is why I say, that unless you have a dedicated
comm operator, Iridium isn't suitable for aircraft to
aircraft comm.
-Shawn
P.S. I do not know what an IDM is.
 
--- Chas Armstrong <chas.armstrong at comcast.net> wrote:

> Maybe I don't understand Iridium sats, but I
> thought that phone number switching is done at
> central offices.  If an a/c has the proper
> equipment, i.e sat radios or IDM's, why is it not
> possible to use the Iridium constellation for
> comms?
> 
> CA
>  
> -----Original Message-----
> From: scan-dc-bounces at mailman.qth.net
> [mailto:scan-dc-bounces at mailman.qth.net] On Behalf
> Of Shawnerz
> Sent: Wednesday, December 29, 2004 11:34 PM
> To: kevin eiler
> Cc: scan dc
> Subject: Re: [Scan-DC] Tigers A/A freqs
> 
> 
> Kevin (and all),
> I wouldn't think air to air comm would go to
> Iridium. 
> Iridium is similar to a (big and heavy) cellphone.
> 
> AFAIK, it does not have a push-to-talk (PTT)
> feature. 
> So, you have to enter somebody's number (which is
> something like 13 digits) wait for the call to be
> setup over the satellites, wait for the other
> person
> to answer, then you can start talking.
> As such, it doesn't lend itself to easily being
> used
> in the cockpit of an airplane.
> -Shawn
> 
> --- kevin eiler <kevineiler1982 at comcast.net>
> wrote:
> 
> > the tigers air to air has been found and looks
> like
> > the future of milair
> > comms,they have and will be using motorolas
> iridium
> > dod satcoms.
> 
> 
> 
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