Dirk can add to this as he wishes, however Mt Fuji is around
12,400ft±--(I walked up part of it and am still out of breath 2 years
later) Any trail falling below the near crest would indicate
incandescence below 12,000. (2miles±) and would be sufficient for
estimating 10k ft.
Somewhere, I read that active incandescence can't exist below 5 miles
as the air is too dense for your typical meteoroid to maintain
incandescence generating velocity I however, observed a bolide that may
have exploded at certainlky less than 4 and possibly around 3 miles
using artillery observer methods and from which a 2kg meteorite was
recovered. So I am not sure how valid the 5 mile barrier is. I hope we
get some more data. Does anyone have a reference to altitudes where
incandescence is extinguished?
Recovering a meteorite from that vicinity is problematic owing that it
is a series of lava flows and part of it is a US Marine tank gunnery range.
Elton
Marco Langbroek wrote:
Dirk, I am wondering: how can you know the end altitude? You have to
triangulate photographs or video images taken from at least 2
well-separated locations to know that. Also, this end altitude would
be quite low for a meteorite, although not entirelly impossible.
- Marco
-----
Dr Marco Langbroek
Dutch Meteor Society (DMS)
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