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Re: Several questions about windspeed !

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  • sam974fr
    Thanks a lot, everything is clear now. ... because the ... setting in ... speed ... manufacturer. ... samples ... or say ... gust ... about ... ILS and ...
    Message 1 of 6 , Jan 24, 2009
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      Thanks a lot, everything is clear now.


      --- In wuhu_software_group@yahoogroups.com, "wuhu_software"
      <wuhu_software@...> wrote:
      >
      >
      > All of the data on column one is relative to the most recent reading
      > from the console. The average wind speed below gust is just the
      > average of the wind speed (not gust) over the last 2 minutes.
      >
      > The other columns of data are relative to the time period you have
      > selected below the stats area (either in terms of hours or minutes).
      >
      >
      > --- In wuhu_software_group@yahoogroups.com, "sam974fr" <sam974fr@>
      > wrote:
      > >
      > >
      > >
      > > Thank you for your answer,
      > >
      > > The possible max windspeed can reach 250 to 300 km/h (180 mph)!!! ,
      > > but I don't think that my windsensor will resist at this windspeed !
      > >
      > > And just one more question: I understand that the average column
      > > between delta hi/low and rate(hr) is the average of the last 2 minutes
      > > but I don't understand the meaning of ave.windspeed just below
      > windgust ?
      > > Thanks for all
      > > .
      > >
      > >
      > >
      > >
      > > --- In wuhu_software_group@yahoogroups.com, "wuhu_software"
      > > <wuhu_software@> wrote:
      > > >
      > > > Samuel,
      > > >
      > > > The reason that the wind speed is limited to 137.4 mph is
      because the
      > > > most home weather stations (check your manual) are not capable or
      > > > reporting speeds that high. The intention is to catch bad data from
      > > > the console and reject it. Some of these weather stations are more
      > > > prone to bad data than others.
      > > >
      > > > Are you saying that you are using the Alternate Wind Sensor
      setting in
      > > > WUHU that was intended for the Inspeed Vortex? If so, I can increase
      > > > the maximum wind speed if the alternate sensor is used. What is the
      > > > maximum possible wind speed you could see there?
      > > >
      > > > The definition of Wind Gust and Wind Speed differ depending on the
      > > > setup you have.
      > > >
      > > > If you have a La Crosse WS-2310, the station only reports wind speed
      > > > so wind gust is simply the highest speed seen over the past 10
      > minutes.
      > > >
      > > > If you own a station like a Davis, that reports a separate wind
      speed
      > > > and wind gust value, the definition is determined by the
      manufacturer.
      > > >
      > > > If you have an Inspeed Vortex (or similar) used with WUHU, the wind
      > > > speed is the average of the last 10 samples where none of the
      samples
      > > > can be older than 5 seconds. The wind gust is the highest speed seen
      > > > over the last 10 samples.
      > > >
      > > > WUHU will remember the highest wind speed and the highest wind gust
      > > > seen between updates from the console and will store that data with
      > > > the other console data once an update is received from the console.
      > > > The frequency of updates from the console depends on the type of
      > > > console (7 seconds for a WS-23XX station, 2.5 seconds for a Davis).
      > > >
      > > > Now when it comes to reporting to the weather servers, it depends
      > > > whether you are talking about rapidfire at Weather Underground
      or say
      > > > CWOP. Rapidfire updates present the current live data (that contain
      > > > wind data -and- data from the console as mentioned above), non-rapid
      > > > fire updates, like those to CWOP present averaged data.
      > > >
      > > > The definition of wind speed for non-rapidfire is the average wind
      > > > speed over the last 2 minutes. The wind gust is the highest wind
      gust
      > > > seen over the past 10 minutes. I did not create these definitions,
      > > > they were created by the weather servers.
      > > >
      > > > When you refer to the lines, I am guessing that you are talking
      about
      > > > the in the graphs? That meaning of that data matches the definitions
      > > > given above. Remember that the data is only charted when an update
      > > > from the console is received. When you are using an alternate wind
      > > > sensor, the wind sensor data is not combined with the console data
      > > > until the console update is received. WUHU does remember the highest
      > > > speeds seen between console updates.
      > > >
      > > > If the above is unclear, let me know.
      > > >
      > > >
      > > > --- In wuhu_software_group@yahoogroups.com, "sam974fr" <sam974fr@>
      > > > wrote:
      > > > >
      > > > > Hi,
      > > > > I have some question about windspeed.
      > > > >
      > > > > First :
      > > > > I have a WS2300 but i use un alternate wind sensor that use
      ILS and
      > > > > calibrate it with the WS2300 windsensor. It's a brooke ang
      gatehouse
      > > > > wind sensor for marine boat.It work great with WUHU but I
      made some
      > > > > test with it to see what is the max windspeed supported and
      i've got
      > > > > this error in the log oh wuhu:
      > > > >
      > > > > Sun Jan 18 15:05:45 2009 > Wind gust speed reading of 137.4 mph
      > > > > detected. Value out of range (0 to 111.8).
      > > > > Sun Jan 18 15:05:45 2009 > One or more data items could not be
      > > > > automatically corrected, Ignoring ALL data on this update.
      > > > >
      > > > >
      > > > > Is that means that I can't record wind which are faster than 111
      > mph ?
      > > > > (180km/h) ? Why ? I leave in the indian ocean (Reunion Island) and
      > > > > there are hurricanes ! Is that mean that i won't be able to record
      > > > > wind faster than 111 mph (180km/h)?
      > > > >
      > > > > Second:
      > > > >
      > > > > How Is calculate Windgust ? I don't understand what is the
      > difference
      > > > > between the highest windspeed and the highest windgust ? Why it
      > is not
      > > > > the same ?
      > > > >
      > > > > Third :
      > > > >
      > > > > Is it possible to have some explanation about the WUHU console ? I
      > > > > mean ( average column, windspeed line, windgust line, ave.speed
      > > line )
      > > > >
      > > > > Thank you for your explanation, and thank you for this great
      > software.
      > > > > Sorry for my bad english, i'm french.
      > > > >
      > > > > Samuel
      > > > > http://pagesperso-orange.fr/leumass/meteo/meteo.html
      > > > >
      > > >
      > >
      >
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