(meteorobs) Talking clocks

meteoreye at comcast.net meteoreye at comcast.net
Mon Jul 7 11:17:25 EDT 2008


Hmmm, I see. Here in the US we have WWV and CHU available on shortwave frequencies which give out the time continuously  that you could record when a fireball is spotted. I don't know if any such time signals are available in europe though.
Wayne

-------------- Original message -------------- 
From: Francisco Ocaña <albireo3000 at yahoo.es> 

> Well, I want it for fireballs. I usually do double observation and 30-60 
> seconds (camera exposure time) mean around 10 arcmins in astrometry 
> accuraccy, a bit high value. 
> 
> I will try the stopwatch method, but in the last geminids it would have 
> been stressing, hehe. After that I realized that I need a talking clock :-) 
> 
> Thank you! 
> 
> Paco 
> 
> meteoreye at comcast.net escribió: 
> > That is true for all talking devices I've seen (or rather heard) It's really 
> no big deal, as measurements to the nearest minute are more than adequate for 
> 99.9999% of all meteor observations. 
> > 
> > I do keep a stopwatch around my neck as well to time fireballs (the only time 
> where accuracy to the second is usually necessary) which allows me to then take 
> a break and determine the fireball time, and also wait for sounds several 
> minutes later. But in most cases, it's not worth the extra time to take my eyes 
> off the sky. 
> > 
> > When I see a meteor bright enough to be recorded by the NJAA all sky camera 
> (+2 or brighter) I will hit the time talk a few times to determine whether it's 
> in the first half of the minute or last, but it rarely makes a difference. In 
> most cases, recording to the second is superfluous information...besides you 
> then need to estimate how long it took you to hit the talker anyway, since it is 
> not instantaneous. 
> > 
> > Wayne 
> > 
> > -------------- Original message -------------- 
> > From: Francisco Ocaña 
> > 
> > 
> 
> 
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