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[aprssig] Weather Station Path/Rate Recommendations

William McKeehan mckeehan at mckeehan.homeip.net
Tue Jan 20 16:35:31 UTC 2009


Thanks for the response Bob!

I did a google search on your site and only found 3 pages that mention the
word weather, none of them appear to have this information.

I'll pass this along to the guys in KY and see if we can get them to make some
changes.

Thanks again!
-- 
William McKeehan
KI4HDU
http://mckeehan.homeip.net


On Tue, January 20, 2009 11:13 am, Robert Bruninga wrote:
> Re:  WX data rates, your hunch is correct!
> The historical answer for WX stations:
>
> * Use "complete WX" format if possible (contains posit and WX in
> each packet)
> * 10 minute rate preferred (standard Net cycle time)
> * Usually DIRECT or 1 hop MAX if from a high-site
> * Minimum hops to hit local SKYWARN net or IGATE otherwise
> (still max 1 recommended)
> * Decay Algorithm for non-changing data
>   > Decay if no temp or rain change
>   > decay if wind speed zero or unchanging
> ** Note, histroically, PeetBros WX stations in PACKET mode are
> fixed at 5 minute rate and that is acceptible.
>
> Now I don't know IF or WHERE this might be published in all my
> docs, but I think that was the general concensus back in the
> 1996 time frame when we were nailing all this down.
>
> Bob
>
>> -----Original Message-----
>> From: aprssig-bounces at tapr.org
>> [mailto:aprssig-bounces at tapr.org] On Behalf Of William
> McKeehan
>> Sent: Tuesday, January 20, 2009 10:40 AM
>> To: aprssig at tapr.org
>> Subject: [aprssig] Weather Station Path/Rate Recommendations
>>
>> I'm looking for an "official" source (i.e., something like a
>> page on aprs.org)
>> of recommendations for weather station path's and rates on RF.
>>
>> There are a couple of stations that have been brought to my
>> attention that are
>> excessive, and I'd like to point them to a good source when I
>> suggest they
>> make changes so it's not just me suggesting it, but the
>> recommendation of the
>> APRS community.
>>
>> The stations in question are KF4ZUX-4 and KG4LKY.
>> https://mckeehan.homeip.net/javaprs/usage.html
>>
>> Their packets hit a large digi directly. The local digi in
>> Knoxville, TN
>> (KD4CWB-3) is some 70+ miles away and diging them after one
>> hop. One guy is
>> running a WIDE2-2 path, the other is running WIDE3-3.
>> Personally, I think
>> weather information should be digi'd enough to make it to an
>> iGate, but
>> otherwise should remain local, so my suggestion for these
>> guys would be to use
>> a single WIDE2-1 path.
>>
>> The other thing is their packet rate, one is sending a packet
>> every minute,
>> the other is about every 2 minutes. I'd like to suggest a
>> MINIMUM interval be
>> every 10 minutes with the preferred being 15 or more.
>>
>> Again, these are my thoughts and I'd like to see some
>> recommendations from the
>> experts on the matter.
>>
>> Thanks!
>> --
>> William McKeehan
>> KI4HDU
>> http://mckeehan.homeip.net
>>
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>
>
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