[wxqc] Future Davis WeatherLink software development for CWOP

[Dave Helms]

Davis has agreed to schedule to following software development changes 
in support of CWOP:
1.  Support the 1 hour and 24 hour rainfall accumulation parameters in 
APRS message (currently only support the since midnight rainfall)
2.  Support  altimeter pressure reduction*
3.  Support "auto roll-over" for APRS-IS servers (time-out and try 
another server if the promary server is not reachable)
4.  Support "rotatewx.aprs2.net" as primary APRS-IS server (this is an 
APRS-IS load balancing technique which will cycle uploads through the 
APRS-IS servers more or less equally)
5.  Standardization of wind parameter calculation:  2 minute sample 
duration to derive mean wind, 10 minute sample duration for peak gust
6.  Standardization of temperature and humidity calculation:  2 minute 
sample duration to derive mean temperature and RH
*Note:  Weather Monitor will not be supported.  Work around is to 
manually adjust pressure from the Weather Monitor console.

Many of the parameters are "derived" in that they are not instantaneous 
measurements from the raw data stream and require additional 
calculations (e.g. altimeter pressure) and/or time range sample to 
calculate a mean and/or peak (wind, temperature, RH).  These additional 
calculations are accomplished by the WeatherLink "Bulletin" function, 
thus the "Bulletin" needs to be open to support the CWOP/APRSWXNET 
parameters.

Please let me know if I forgotten any of the WeatherLink issues we have 
discussed which need software development. Software development in 
support of these changes should start in about 3 months.  A beta release 
of the updated WeatherLink code will be available thereafter.

Dave
CW0351


Jim McMurry wrote:

>For those who are running WeatherLink, there's a new Weather Underground
>module available from their web site that will hopefully cure the occasional
>hangup problems.  Part of the documentation follows:
>
>README Contents 02-08-2006
>
>Weather Underground Expansion Module Version 1.9 for WeatherLink
>
>Changes since last revision:
>+ added rapid fire updates
>+ changed wind speed to send 10 minute average (instead of instantaneous)
>when not in rapid fire mode
>+ changed wind gust calculation period to 1 minute.
>Changes through 1.7:
>+ fixed wind direction values for uploading archived observations
>+ added 10 second timeout to observation uploads in case WUnderground is
>unreachable
>
>Jim McMurry
>C3882
>
>_______________________________________________
>wxqc mailing list
>wxqc at lists.gladstonefamily.net
>http://pond1.gladstonefamily.net:8080/mailman/listinfo/wxqc
>
>The contents of this message are the responsibility of the author.
>
>
>  
>