Received: from opus.hpl.hp.com (opus-fddi.hpl.hp.com) by jr.hpl.hp.com with ESMTP (1.37.109.24/15.5+ECS 3.3+HPL1.1) id AA049942098; Mon, 15 Jun 1998 21:41:39 -0700 Return-Path: <asoldham@earthlink.net-DeleteThis> Received: from hplms26.hpl.hp.com by opus.hpl.hp.com with ESMTP (1.37.109.24/15.5+ECS 3.3+HPL1.1) id AA232442096; Mon, 15 Jun 1998 21:41:36 -0700 Received: from italy.it.earthlink.net (italy-c.it.earthlink.net [204.250.46.18]) by hplms26.hpl.hp.com (8.8.6/8.8.6 HPLabs Relay) with ESMTP id VAA21009 for <wind_talk@opus.hpl.hp.com-DeleteThis>; Mon, 15 Jun 1998 21:41:36 -0700 (PDT) Received: from alex (1Cust120.tnt5.sfo3.da.uu.net [153.37.15.120]) by italy.it.earthlink.net (8.8.7/8.8.5) with SMTP id VAA01575 for <wind_talk@opus.hpl.hp.com-DeleteThis>; Mon, 15 Jun 1998 21:40:10 -0700 (PDT) Message-Id: <3.0.1.32.19980615203821.011d527c@earthlink.net-DeleteThis> X-Sender: asoldham@earthlink.net-DeleteThis X-Mailer: Windows Eudora Light Version 3.0.1 (32) Date: Mon, 15 Jun 1998 20:38:21 -0500 To: wind_talk@opus.hpl.hp.com-DeleteThis From: Sam and Alex <asoldham@earthlink.net-DeleteThis> Subject: calibration of bay area sensors In-Reply-To: <199806160236.AA279354587@jr.hpl.hp.com-DeleteThis> Content-Type: text/plain; charset="us-ascii"
Being new to the Bay area and COTW I would find it extremely useful to have
a description of each sailing area. It could include information such as
how low the meter reads on certain wind directions because of where it's
located, and other misc. info about the launch.
For an example of a similar service on the East Coast that offers these
features check out the Wind Hot Line.
http://www.tiac.net/users/wind/nc-map.html
Alex.
>------------------------------
>
>Topic No. 11
>
>Date: Mon, 15 Jun 1998 17:12:11 -0700
>From: "Bob Prevett" <prevett@nvidia.com-DeleteThis>
>To: support@windcall.com-DeleteThis
>Cc: prevett@nvidia.com-DeleteThis, wind_talk@opus.hpl.hp.com-DeleteThis
>Subject: calibration of bay area sensors
>Message-ID: <88256624.0081D8BC.00@NotesServices.nvidia.com-DeleteThis>
>
>To the folks at Call of the Wind,
>
>Let first me say that I am a relatively satisfied COTW customer. However,
it seems
>that several of the Bay area sensors are not very well calibrated, thus
decreasing
>their usefulness. So, below are some ideas on how to better calibrate the
COTW sensor
>based on observations from windsurfers on the wind_talk@@opus.hpl.hp.com
email list.
>
>Natural Bridges:
>
>The NB COTW sensor is way low, typically 8 to 10 mph below the actual wind
on the
>water. A good way to calibrate this sensor would be to look at the Long
Marine Lab
>sensor data. The site is at:
http://ipmml.cse.ucsc.edu/SlugVideo/wch-weather.html.
>Take a look at the "Two Hour Winds" report. It is very accurate and seems
well
>calibrated with the actual wind on the water. An even better solution
would be to
>somehow use this data directly instead of the COTW sensor data, if that
could be
>arranged. Or, moving the COTW sensor to a position closer to this Long
Marine Lab
>sensor would work, too.
>
>San Luis Resvr:
>
>The San Luis readings seem to be around 10 mph lower that the wind on the
water when
>it's blowing there. The wind readings from the Park windtalker,
209-826-9019, are
>closer to the real wind on the water; these readings are approximately 4
mph under the
>real wind on the water. So, a good first step would be to use this park
windtalker to
>better calibrate the COTW sensor. Or, moving the COTW sensor closer the
Park sensor
>would work as well.
>
>3rd Avenue:
>
>This sensor has always been well below the wind on the water. Potential
solutions
>would be to move the sensor to a golf net pole closer to the launch site,
put the
>sensor on the roof of that new building going up near the 3rd Ave site, or
somehow put
>a sensor near the middle span of the San Mateo Bridge.
>
>Sherman Island:
>
>Based on input from people who have sailed at the Access or Powerlines
this season,
>this sensor appearts to be about 5-7 mph low on days it blows there.
>
>Regards,
>
>BobP
>
>PS - If any other wind_talk'ers out there have additional/different wind site
>calibration data or ideas, please send it to COTW so that we can help them
make their
>sensors even more useful for us.
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