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Re: (meteorobs) Blue pre-Meteor Train
No doubt I'll regret posting this, but how can an object that is above the
layer of the sky illumination (local to observer and airglow) produce a
"dark meteor".
Robert H. McNaught
rmn@aaocbn.aaodot gov.au
On Tue, 10 Aug 1999, Dave English wrote:
> Thank you both, Casper ter Kuile and Marco langbroek, for the
> information about your sightings by video during the Sino-Dutch
> Leonid Expidition of high altitude ilumination of meteor trains in the
> infared zone up to 180 km. This helps validate the report by I.S.
> Astapovich and his 1947-50 sightings of the blue pre-meteor trains and
> his assessment of their altitude at 120-160 km. I guess I'll make a
> post of the information in this report, three paragraphs, so anyone
> can have a record of this report so far ahead of proof.
>
> I wanted to comment on how the pre-meteor train may be our
> elusive Dark Meteors and the Dark Line Events (DLEs) I have reported.
> I've said on several occasions that the DLEs were probably above 45
> miles (72 km) and may be as high as 100 miles (160 km page A-3
> Alastair), I also said on metoerobs on 8 Feb. '99 that Dark Line
> Events may be visible in the infared with photographic or video
> equipment.
>
> Are we talking about the same things? If so, then my location
> may be a prime pre-meteor train observation location. I had asked
> Peter Jenniskens of NASA/SETI/ARC about a year ago for a supervised
> shoot with 25 hours of video tape to record, if possible with a UV and
> IR sensitive cameras, the DLEs and LLEs for scientific study. No reply
> to that e-mail but I still believe it may be worth considering.
>
> As I told Alastair, I have a golf driving range out of sight
> just 1 1/2 miles away that's like a white light beacon into the sky,
> maybe that's why I can see so many Dark Meteors/DLEs (I live just 30
> miles from Palomar Observatory and how the driving range got
> permitted, I don't know, we do have low light street lights).
>
> Thanks again for the information, I'll re-post your e-mail to
> Alastair McBeath, I'm sure he will appreciate it too.
>
> Dave English
>
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