[aprssig] Weather Station Path/Rate Recommendations

Steve Dimse steve at dimse.com
Tue Jan 20 14:13:23 EST 2009

30 minutes is too slow for most situations. It is fine for hurricane  
tracking, but for other types of weather (thunderstorm prone areas,  
frontal observations, etc) rates of five minutes are desired by many  
forecasters. Bob recommends 10 minutes, and that is OK as as a  
generality, but like so many things in APRS, one number will not fit  
all applications. In an area with a high concern for weather and with  
low channel loading, 5 minutes would be very appropriate.

At present, MADIS ingests weather data every 15 minutes, but work is  
in progress to increase it to every five minutes, both to decrease the  
latency and to increase the number of data points.

Steve K4HG

On Jan 20, 2009, at 1:26 PM, John wrote:

> William McKeehan wrote:
>> 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.
> Hi,
> Weather rates ought to be about 15-30 minutes under normal conditions.
> Our interest here at NHC notes that the weather changes slowly  
> during an
> approaching hurricane so rates quicker than these don't help us.
> However I can see that with a tornado bearing down on you you might  
> want
> to set the rate to be once a minute for accurate data to determine  
> it's
> path. But that should be returned to normal after it has passed.
> As for paths, several hops might be useful so the data hits a few
> gateways (never rely on a specific gateway, it could be down) or  
> better
> yet setup your own gateway if possible.
> Also, if you have a weather station join the CWOP, see our web page  
> for
> details and a free version of the Weather Display software.
> John
> -- 
> John Mc Hugh, K4AG
> Coordinator for Amateur Radio
> National Hurricane Center, WX4NHC
> Home page:- http://www.wx4nhc.org
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