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Re: (meteorobs) Re: rotating shutters
Hi George,
>I get the impression that your rotating shutter determines the meteor's
>appearance automatically...is this true? If so how is this done?
No, I mean just the rotating shutter. When you do not see the bright meteor you either need a
guided exposure or someone else who has seen it. Some people used one time very special
shutter blades whose open/close ratio varied during the exposure allowing to derive the time of
appearance. I have no idea how these were made. In The Netherlands we use light detection
systems with a photomultiplier tube to record the time of appearance (for our small fireball patrol
network). With a small tube the limiting magnitude for meteors is about -2. Unfortunately it is quite
a lot of work to construct such a PMT system.
Marc
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Marc de Lignie
Prins Hendrikplein 42 Tel. +31 (70) 320 5673
NL-2264 SN Leidschendam Fax. +31 (70) 332 6477
The Netherlands E-mail: mcdelign@pidot net
Predicted progress always fails. Real progress is all the small
steps you realize to have made when looking back in time.
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