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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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