FW: Eccentric flashing UNID

From: Brierley David (DMBRIERLEY@dera.gov.uk)
Date: Tue May 23 2000 - 01:03:38 PDT

  • Next message: Brierley David: "DMB Obs May 19/20"

    Mike McCants wrote about a quick double flash from Telstar 402:
    
    > >Mike found that by wiggling the telescope a little, the two
    > sub-flashes 
    > >of the double flashes could be seen separately (split?) in the 
    > >field of view.
    > 
    > I thought this was a very interesting phenomenon.  If one could
    > estimate an angular speed for the telescope motion, then the apparent
    > distance that the flash was visible could be translated into a
    > duration time and the dark space between the two flashes could
    > be translated into a separation time.
    > 
    > Suppose the telescope was being moved about 1/2 degree per second.
    > Then a perceived distance for the flash of about 1/20 degree would
    > mean a flash duration of 1/10 second and the distance between the
    > flashes of about 3/20 degree would mean a flash separation of
    > 3/10 second.  It is possible that the speed could have been 1 degree
    > per second and the corresponding times would be 1/20 second duration
    > and 3/20 second separation.
    > 
    For those who weren't at Eurosom 3 in 1998 October, Russell Eberst
    demonstrated how he could get an estimate for the flash period of a very
    rapid flasher by giving his binoculars a small rotary motion at say 2
    revs/sec.
    
    David.
    
    David M Brierley
    Malvern, Worcestershire, UK
    Station 2675, 52.1358N 2.3264W 70m
    davidbrierley@waitrose.com
    
    
    
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