[wxqc] Future Davis WeatherLink software development for CWOP

[spamfree at pensom.org]

Hi,

To be in line with other NWS reporting standards (such as ASOS), I think the data items would be:
Altimeter - lowest altimeter reading during past 1 minute
* Temperature - average temperature over past 5 minutes
* Humidity - average humidity over past 1 minute
Wind dir - average direction over past 2 minute
Wind speed - average speed over past 2 minutes
Wind gust - high wind speed over past 10 minutes

Great news that Davis will support CWOP data!

Best regards,
Steve  H.
  
======= At 2006-02-11, 16:47:49 you wrote: =======

>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
>>
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>>
>>
>>  
>>
>
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