Re: [idvusers] Threshold for closed circle in station model?

Thanks Don/Julien for your help!

CH

--

 Dr. Christopher G. Herbster
 Associate Professor
 Director of Science and Technology
 for the ERAU Weather Center
 Applied Aviation Sciences
 Embry-Riddle Aeronautical Univ.
 600 S. Clyde Morris Blvd.
 Daytona Beach, FL 32114-3900

 386.226.6444 Office
 386.226.6446 Weather Center
 http://wx.erau.edu/

Schedule at:  http://wx.erau.edu/faculty/herbster/Schedules/


On 04/16/13 20:28, Don Murray wrote:
Chris-

Except for 2.5 which is a single line with no flag, if I read the code right, it's >= on the low side and < on the high side (as you have it below).

Don

On 4/16/13 4:54 PM, Herbster, Christopher G. wrote:
Julien,

So would "10" be >=7.5 and < 12.5 and then >=12.5 and < 17.5 for "15"?
I guess the question is, "which edge gets the "=" sign for inclusion in the binning?" I assume the break points are included on one edge. (There I go again, making more assumptions! )

Thanks for your help,

Chris Herbster


Sent via the Samsung Galaxy SâIII, an AT&T 4G LTE smartphone with tiny keys and a strong desire to substitute, sometimes humorous, words into messages.

-------- Original message --------
From: Julien Chastang <chastang@xxxxxxxx>
Date:
To: idvusers@xxxxxxxxxxxxxxxx
Subject: Re: [idvusers] Threshold for closed circle in station model?

Professor Herbster,

We've been burned ourselves :-)

My notes say:

- a circle for calm winds (0 speed)
- a shaft with no barbs<= 2.5 knots
- a shaft with a half barb for > 2.5 and< 7.5 knots

Please let us know if you have further questions.

Best Wishes,

Unidata IDV Support


On 4/16/13 3:02 PM, Chris Herbster wrote:
Hi folks,

Before I attempt to look through code that I don't know (in a language
I can barely read), can anyone help with a definitive answer to the
thresholds used to draw a "calm" circle around a station, a shaft with
no barbs, and then the 5 knot increment for the barbs?  (I assume that
a "short barb" for "5 kts" is drawn is speed is >2.5 kts and <= 7.5,
but I have gotten burned by an assumption more than once in the past!)

As always, any help is welcome!

Thanks,
Chris Herbster


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