Bolide del Mar Baltico

Per conscenza
Saluti
renzo C.

------Messaggio inoltrato

Risposta: <VLF_Group@yahoogroups.com>
Data: Tue, 20 Jan 2009 23:23:36 -0000
A: <VLF_Group@yahoogroups.com>
Oggetto: [Spam] [VLF_Group] Fireball over the Baltic Sea - Update

Hi,

All available reports (about reports...) up to now indicate a steep
impact and a huge explosion in the troposphere over the Baltic Sea.
For shure it was not a grazing shot. Reflecting heights of LF
propagation over short pathes are 90 to 110 km at winter-nights
according to Jacobi & Kürschner from Collm Observatory near Leipzig.

From the Polish Fireball Network I got a more accurate time for the
impact: 19:08:30 UT +/- 1sec. That time information coincides with the
interval obtained by visiting several webcam sites.

There is a minor peak inside the data close to that reported impact
time, and it appears stronger from NE (44.2 KHz) which has been listed
as a Swedish Navy transmitter. It is not visible at other frequencies,
VLF included. But I cannot account it to be "significant" compared to
usual LF/VLF signal traces which show very non-symmetrically
distributions. Would be a nice exercise of non-parametric statistics...

See: http://home.arcor.de/df3lp/misc/09-01-17_meteor.png

Peter,
54N 10E

PS: archived data available at
http://iono.bplaced.net/192/
http://iono.bplaced.net/48/

Ma è possibile che il bolide in questione sia stato visto anche dalle Alpi?

Ferruccio

Troppo distante, a causa della curvatura terrestre!