[wxqc] Davis Vantage Pro2 Question
Evan Bookbinder
Evan.Bookbinder at noaa.gov
Mon Sep 25 20:27:41 CDT 2006
Dr. Lee,
Respectfully, as a NWS meteorologist, I can assure you that this is not
what is required for NWS data submission. I found your last two posts to
be both rude and condescending, especially when considering the great
efforts (time and money) spent by folks to provide us and many others
with such valuable data. I'm not sure what kind of "doctor" talks to
people in that manner, but I would at least hope that someone with such
an education would know how to spell vane (not vain) and instruments
(not interments).
What IS required is that sites make their best effort to set up their
weather stations within the siting guidelines. Mr. Geilla's intentions
fall well within these guidelines. These are generally home weather
stations, not commercial outfits on airport properties with the luxury
of having a powered 10m pole available for use. Neighborhood covenants,
building restrictions and the unsightly look of a 10m pole are just a
few reasons why instrumentation is usually NOT co-located in the
vertical. In most instances, the temperature/dewpoint and rain gauge are
located together, separately from the anemometer which often times is
attached to the roof of a house.
Mr. Geilla's approach is not only WELL within the guidelines
established, but better than the overwhelming majority of sitings that
I've seen. 100 feet horizontal separation of the anemometer will have
zero effect on data quality because of the absence of obstructions at
that altitude within the free wind. The changes of 10m wind direction
and speed typically occur on a scale of tens of miles, not feet.
Evan
dr. Lee wrote:
> Then you will not be set up as requested by the NWS for submission to
> the NWS database.
>
> Why not place one above the other as the system was designed?
>
> Dr. Lee
>
> -----Original Message-----
> *From:* wxqc-bounces at lists.gladstonefamily.net
> [mailto:wxqc-bounces at lists.gladstonefamily.net] *On Behalf Of
> *Thomas Giella KN4LF
> *Sent:* Monday, September 25, 2006 5:39 PM
> *To:* Discussion of weather data quality issues
> *Subject:* Re: [wxqc] Davis Vantage Pro2 Question
>
> *The anemometer will be up at 33 feet but also located
> approximately 100 feet in the horizontal from the ISS, so an
> extension cable will be necessary.*
> **
> *--... ...--,
> Thomas F. Giella, KN4LF
> Lakeland, FL, USA
> Grid Square EL97AW
> kn4lf at arrl.net <mailto:kn4lf at arrl.net>*
>
> *KN4LF Amateur & SWL Radio History: http://www.kn4lf.com
> Radiowave Propagation Yahoo eGroup:
> http://groups.yahoo.com/group/radiowavepropagation
> New Scientific Evidence for the Existence of God:
> http://www.cosmicfingerprints.com/audio/newevidence.htm *
>
> ----- Original Message -----
> *From:* Victor Engel <mailto:brillig at gmail.com>
> *To:* Discussion of weather data quality issues
> <mailto:wxqc at lists.gladstonefamily.net>
> *Sent:* Monday, September 25, 2006 2:51 PM
> *Subject:* Re: [wxqc] Davis Vantage Pro2 Question
>
> I thought temp/humidity sensors were supposed to be about 2
> meters or 5 feet above ground. It doesn't really matter where
> the barometer is as long as you enter the right elevation.
>
> On 9/25/06, *dr. Lee* <drlee6530 at drlee.com
> <mailto:drlee6530 at drlee.com>> wrote:
>
>
> I own a Davis pro 2 plus and the cable supplied is plenty
> long if you
> install it to NWS standards.
>
> 1. the weather vain should be at 33 ft and they supply 40 ft.
> 2. the rest of the interments should be at 3 meters above
> ground below the
> weathervane.
>
> So you have plenty of cable supplied by Davis for an install.
>
> Dr. Lee
>
>
>
>
> Hello To All,
>
> I'm new to the eGroup.
>
> I just purchased a Davis Vantage Pro2 with the optional
> fan aspirated
> temperature/humidty shelter. As all know the Pro2 has the
> integrated sensor
> suite (ISS) with wind vane/anemometer attached. You can
> run the included
> cable of 40 feet between the ISS and anemometer/wind vane
> unit and add cable
> extensions of up to 540 feet.
>
> For better wind data accuracy I need to detach the
> anemometer/wind vane
> from the ISS and place it at 35 feet up on a mast, further
> away than the 40
> foot included extension cable.
>
> I have aquestion. Is the 40 foot extension cable a
> regular telephone type
> cable with male connectors on each end? In other words can
> I buy regular
> telephone cable extensions at Wal Mart or Home Depot to
> use between the ISS
> and anemometer/wind vane? Or do I have to buy the Davis
> (overpriced in my
> opinion) cables?
>
> Next month I'm buying the model #6332 wireless version
> of the wind
> vane/anemometer and the cable thing will not be an issue.
>
> Take Care,
> Thomas F. Giella, KN4LF
> Retired Meteorologist & Space Plasma Physicist
> Lakeland, FL, USA
> flycylone at tampabay.rr.com <mailto:flycylone at tampabay.rr.com>
>
> NWS Tampa Bay, FL SKYWARN Observer #POL-10A
> CWOP Station #AR692/KN4LF
>
> Lakeland, FL Daily Climatological Weather Data Archive:
> http://www.kn4lf.com/kn4lf22.htm
> September 2006 Lakeland, FL Daily Climatological Weather
> Observations
> http://www.kn4lf.com/kn4lf63.htm
> Florida/US Raw Weather Forecasting Resource Links:
> http://www.kn4lf.com/kn4lf13.htm
> Man Induced Climate Change Refuted:
> http://www.kn4lf.com/globalwarminglie.htm
> New Scientific Evidence for the Existence of God:
> http://www.cosmicfingerprints.com/audio/newevidence.htm
>
>
>
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