Re: [ATM] Dark Sky Meter with Motion Sensor

["matt" <mariusrf@bellsouth.net>]

There is an "official" method to measure turbulence, it's called DIMM
(Differential Image Motion Monitor) . Look for example here:
http://www.astro.washington.edu/rest/dimm/index.html
http://www.ctio.noao.edu/telescopes/dimm/dimm.html
Please note that even if the above are professional observatories with very
large main telescopes, the DIMM measurement uses a small 8" to 11" scope , a
laptop and a small old SBIG CCD . I have an identical setup in my back yard
and  log my turbulence data.

best regards,
matt tudor


-----Original Message-----
From: Kevin Whitefire <chaosopher23@yahoo.com>
To: Dominic-Luc Webb <dlwebb@canit.se>
Cc: ATM <atm@atmlist.net>
Date: Thursday, October 07, 2004 1:48 PM
Subject: Re: [ATM] Dark Sky Meter with Motion Sensor


>
>--- Dominic-Luc Webb <dlwebb@canit.se> wrote:
>
>>
>> If
>> properly planned,
>> it could be done several times per evening (around
>> here anyway). Of
>> course, the best question to ask at the moment is
>> what are you trying
>> to measure (sample rate, wavelength()s, etc)?
>>
>>
>> Dominic-Luc Webb
>>
>>
>
>Frequency is a nice thing to know, but amplitude and
>how much will the turbulence disturb the image.
>Amplitude, in that case, would be the most important
>measurement.
>
>If connected to the computer that's taking a CCD
>image, it can shut off the exposure during rough air
>and turn it back on during quiet periods.  A better
>CCD image results, though with a longer exposure.  I
>don't know how it will work with film.
>
>Kevin of Eastern Iowa
>Seeker of the Darkness
>
>
>
>_______________________________
>Do you Yahoo!?
>Declare Yourself - Register online to vote today!
>http://vote.yahoo.com
>_______________________________________________
>ATM mailing list http://www.atmlist.net/

_______________________________________________
ATM mailing list http://www.atmlist.net/