Nate WY0X wrote: "having an IP Gateway up WAY up high at the super wide area Digi site is going to change the Denver APRS "landscape" a bit, but I'll leave that to the Digi owner to discuss with folks, etc... should be a GOOD thing..."
In the APRS world, Bruninga has recommended that the APRS digipeater architecture works better if each one has limited range and you have more of them scattered about. The simplex digipeater can handle only so many beacons a minute, and the ones with really tall antennas can get overloaded, causing lots more collisions. Of course, I haven't looked at recent statistics. I suppose over time, some of those APRS beacons could get shifted to DStar. I have a question. On the email list of a local DStar repeater, it was pointed out that: One thing to keep in mind is if you are sending this positioning information automatically, you may be colliding with another user attempting to be making a voice transmission. As we know, the R2D2 affect happens when a doubling takes place and I just want to make sure everyone understands the outcome of sending GPS data in an automatic mode. We must also keep in mind, that if you have your radio set to a memory channel that connects your transmission to another System through the Worldwide Gateway your GPS data is also being sent to the distant node. He recommended stationary radios beacon every 12 hours, and mobile radios send their position only on PTT, not automatically. This makes sense to me, but I'm curious how other parts of the country feel about it. Jim - K6XZ ----- Original Message ----- From: Nate Duehr To: Discussion of D-RATS Cc: [email protected] Sent: Wednesday, May 20, 2009 5:48 PM Subject: [DSTAR_DIGITAL] Re: [drats_users] Dprs question On Wed, 20 May 2009 07:36:15 -0400, "Adam Karsin" <[email protected]> said: > First thanks to everyone! It works, no fancy software (like I had been > told > in the past) just hook radio to GPS, set a few settings in the radio and > *poof* *presto* there is a little icon of me on the web!! Ok, it's early, > I > entertain easily! You have me laughing because that was MY first experience with it too... and I set up the darn Gateway! (I didn't know all that add-on stuff included a "it just works" copy of javaAPRSd running on the Gateway that would send all the right "stuff" to the world. LOL! > So for about the 2 hours I was driving around I have realized something, > _bring extra batteries_. 15 minutes into running errands yesterday the > GPS > batteries died, and shortly after that the battery on the 91AD followed > suit. Same thing happened here too... I quickly realized that I have EITHER a serial cable for my venerable old Garmin GPS V, *OR* a power cable, but not one of the "dual" cables. Oops. Something to order... eventually. Rechargeable AA batteries are playing "cover" in the mean-time. One of the posts on the Gateway admin's list a while back talked about how to drive a separate TNC/radio with the SAME copy of javaAPRSd from the D-STAR Gateway machine, to create an APRS/IP Gateway on "that side" of things. With the repeater being at a REALLY high mountain-top site and there is already an APRS DIGI up there, radio/antenna/etc... already up there, and owned by one of the tech crew members of the D-STAR group... all we have to do is run a cable to the TNC, reconfigure things a bit... and voila... APRS/IP Gateway. Then we can also gateway the DPRS from the D-STAR side to the RF side on APRS and back and forth if we want to, without having to hunt down the current IP Gateway operators, necessarily. (Obviously having an IP Gateway up WAY up high at the super wide area Digi site is going to change the Denver APRS "landscape" a bit, but I'll leave that to the Digi owner to discuss with folks, etc... should be a GOOD thing... but hey, we have solid IP access up there... why not? Save a few hops and some air-time... just about everything in the city can get there direct.) So... anyway... that'll be much later this summer, if we even get 'er done. We're all swamped with more pressing projects right now. But it's a cool thing to do up there. Have fun with DPRS! Nate WY0X -- Nate Duehr [email protected] . [Non-text portions of this message have been removed]
