On the average altitude of (video) meteors

Details On the average altitude of (video) meteors On the average altitude of (video) meteors

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jimo...36..124m&link_type=abstract

WGN, Journal of the International Meteor Organization, vol. 36, no. 6, p. 124-130

Physics

1

Scientific paper

In this paper, we derive a new formula for the average altitude of (video) meteors. It was determined from double-station data of the Japanese SonotaCo Network, and confirmed by single-station data of the IMO Video Meteor Network. In the simple form, the relationship between the mean meteor altitude h_m [km] and the velocity at infinity v_inf [km/s] of a meteoroid is h_m = 0.48 x v_inf + 73. The average altitude range in which the meteor is visible is 12 km, independent of v_inf. Hence, the mean begin height h_b [km] is h_b = 0.48 x v_inf + 79 and the mean end height h_e [km] is h_e = 0.48 x v_inf + 67. The average meteor altitude depends on the apparent meteor brightness m [mag], the meteor duration d [s] and the entry angle of the meteoroid ea [g], which is equivalent to the zenith attraction corrected height of the radiant. If these parameters are taken into account, the average meteor altitude becomes h_m = 0.48 x v_inf + m - ea/10 + 78, and the altitude range h_b-h_e = 38 x d.

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