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Re: Emergency operations


I notice that you quoted Art's message instead of mine. If I remember correctly,
he is older than me and most HF radios.

In my message I stated that HF is great for voice communication but that
bandwidth is limited for data communication. The point of my message was that
satellites would contribute more to emergency communications by providing a
larger pipe for data communication than by providing voice communication that is
already handled locally with VHF HTs and regionally with HF radios. Notice that
my message opened with "It seems to me that AMSAT and the ARRL (ARES and RACES)
need to discuss emergency communication and where satellites fit" and concluded
with "the determining factor is probably which type of ground station is best
suited to emergency use". If you've read the messages that I've posted in the
past few years, I've also been arguing for amateur satellites that allow simpler
ground stations and I assume that is also a prerequisite for emergency use. The
original PACSATs were developed for and used by simple ground stations using
battery power and omnidirectional antennas. Much higher data rates could be
supported with better satellites and the better software in the PC.

PCs and PDAs are more portable than HF radios and the ARES and RACES people at
ARRL HQ say that they are being used in increasing numbers in shelters and by
emergency responders. I'm not opposed to using voice communications in emergency
situations but think that it could be augmented by data communications that
eliminates the need for transcription. Neither am I denegrating HF as I was the
author of a proposal to allow 20 kHz bandwidth data communication on HF. That
seems to have been shelved and 3 kHz is still the limit in the ARRL regulation
by bandwidth proposal and the IARU band plans.

For emergency situations, I don't see where amateur satellites provide any
advantage in voice communication, but since they could provide faster digital
communication, I was encouraging AMSAT and its members to consider that.

73 and Happy New Year,


----- Original Message -----
From: "AAM9ECS" <ae6fl@arrl.net>
To: <amsat-bb@amsat.org>
Sent: Saturday, 01 January, 2005 05:43 UTC
Subject: [amsat-bb] Emergency operations

> ----- Original Message -----
> From: "KC6UQH" <kc6uqh@cox.net>
> Sent: Friday, 31 December, 2004 19:30
> Subject: Re: [amsat-bb] RE: Will AMSAT (world wide) be ready for the next
> disaster?
> > John,
> > The ARRL has always had an H.F. mentality, and I have suggested several
> > times that they should change their name to the Antique Radio Relay
> > League.
> <snip>
> Hope that you really enjoy the taste of your foot there John! Voice and/or
> CW modes on HF continue to be widely used in emergency communications and
> they're growing in popularity for several reasons including;  affordability
> of equipment, dependability and effectiveness. Infrastructure intensive
> amateur modes such as packet, satellite, SSTV and Winlink are great and I
> use those modes frequently. However, a network of trained voice and/or CW
> mode operators can move lots of message traffic. The minimum HF station with
> a 12v battery, 5w to 100w transceiver, antenna tuner and as much wire up in
> the trees as can be engineered quickly makes for a cheap and effective means
> of communicating from directly in the area of operations out to a couple
> thousand miles or more. How else can this be accomplished as cheaply? Add a
> few stations with experienced operators that know how to conduct an
> efficient network to accurately relay message traffic and you have
> dependability.
> Generators are few and far between right now in the tsunami affected areas
> and HF radios that work on 12v auto batteries are critically important, as
> you may have read on this reflector earlier in the week. When bad stuff
> happens, the lowest common denominator is often times all that's available.
> Antique appears to have a negative connotation for you. Emergency
> communicators around the Indian Ocean are most probably very appreciative of
> a working HF radio even if it's older than you are ...
> If you'd like to participate in a serious emergency communications system
> with many truly top-shelf (not showboaters...) operators and extensive
> training oportunities, please contact me at your earliest convenience.
> SGD,
> Michael Barry AE6FL/AAM9ECS
> ae6fl@arrl.net
> - U.S. Army MARS Emergency Operations Officer for Southern CA
> - ARES Emergency Coordinator for North San Luis Obispo County
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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