<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Thanks Guys,</div><div><br></div><div>I really appreciate all of these answers. Its been a huge help in understanding this. </div><div><br></div><div>Sincerely,</div><div>Mike</div><div>KB3IXO</div><div><br></div><div><br></div>
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-------- Original Message --------<br>
Subject: Re: [aprssig] radio aprs vs internet aprs<br>
From: Tom Hayward <<a href="mailto:esarfl@gmail.com">esarfl@gmail.com</a>><br>
Date: Tue, March 20, 2012 10:13 am<br>
To: TAPR APRS Mailing List <<a href="mailto:aprssig@tapr.org">aprssig@tapr.org</a>><br>
<br>
On Tue, Mar 20, 2012 at 07:23, Mike Goldweber <<a href="mailto:mike@mikegoldweber.name">mike@mikegoldweber.name</a>> wrote:<br>
> The next day I ran into the guy who organized and ran the communications.<br>
> He told me that he got the message when he linked his system to the<br>
> internet, but during the race he comm's trailer was not linked to the<br>
> internet, which is why he did not receive my message immediately.<br>
<br>
This statement is misleading. RF APRS and APRS-IS are both realtime<br>
networks, and so data must be received immediately or not at all. The<br>
only way he could have seen your message a day later is by referencing<br>
an archived history of APRS-IS data (e.g., <a href="http://aprs.fi">aprs.fi</a>, findu, or his<br>
personal log).<br>
<br>
Think of APRS-IS as just another frequency, lets call it 2.4 GHz. He<br>
was on 144.39 MHz and you were on 2.4 GHz, so normally you wouldn't be<br>
able to communicate. I-gates exist to gate messages between networks.<br>
If there was a properly configured I-gate in your area, your message<br>
would have been passed from "2.4 GHz" to 144.39 MHz and your friend<br>
would have received it. It sounds like your area does not have a<br>
transmit-capable I-gate. I-gates are easy to operate once you collect<br>
all the required equipment (antenna, 2m radio, TNC, computer, and<br>
Internet connection). This may be a good project for you to pursue.<br>
<br>
Tom KD7LXL<br>
<br>
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