[aprssig] BIG-TALL digis that hear FAR too MUCH!
Robert Bruninga bruninga at usna.eduTue Dec 14 02:43:01 UTC 2004
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Steve ran a process on FINDU data that generated a list of all the APRS digipeaters in the world and sorted them by their claimed PHG range. Then searched for the total number of users in that range. and found over 250 that can hear far more than any possibly useful ALOHA group. As we all know by now, any digi that can hear more than about 60 users is definately going to suffer real reliability issues for any stations other than the strongest and closest (who step all over the weak guys)... (not even countiing all the other digis it hears!) Here is the SORTED list starting with the worst: http://web.usna.navy.mil/~bruninga/aprs/digiphgr.txt Here is the same list sorted by call so that you can find out where your digi stands.... http://web.usna.navy.mil/~bruninga/aprs/digiphgc.txt These digis are doing nothing but ruining reliability for the users in range. It is far better to let the lower more local digis handle the local users and for the big mountain top one to cease QRMing the channel. or at least put its output over onto a UHF channel so those that want to hear the mess can monitor, but at least those packets dont reduce the channel capacity in the other several thousand square miles by 50% by its digipeating! If this data is innaccurate for your digi, then please fix your claimed PHG range to better match reality. Thanks de Wb4APR, Bob
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