Radar observations of the Leonid meteoroid stream in 2001

Pupillo, G. and Cevolani, G. (2003) Radar observations of the Leonid meteoroid stream in 2001. Il nuovo cimento C, 26 (2). pp. 151-158. ISSN 1826-9885

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Results of the Leonid meteoroid stream observed in 2001 are presented. Data have been collected during November 13-23, 2001 by using a forward-scatter radar operating along the two long baselines of Bologna-Lecce (700 km) and Bologna-Modra (600 km). The profile of the reflection time shows a broad component on November 18 in the 00–12h UT time interval with maxima between 09:00h and 11:00h UT. About 90% of the reflection time was recorded at the two receiving stations of Lecce and Modra during the peak hour with an associated mass index of s = 1.72. The flux reached a value of 4.5 × 10−11 m−2 s−1 at the solar longitude 236◦ .09±0◦ .02 (November 18, 9h 30m UT) for echoes with duration T ≥ 1 s corresponding to a limiting mass of m � 10 −5 kg. For longer-duration (T ≥ 8 s) echoes, the main activity peak was found a hour later at the solar longitude 236◦ .13±0◦ .02 (November 18, 10h30m UT), similarly as reported by visual observations. The perspective of high levels of Leonid activity in 2002 is discussed.

Item Type: Article
Uncontrolled Keywords: Meteors, meteoroids, and meteor streams ; Radio, microwave (> 1 mm)
Subjects: 500 Scienze naturali e Matematica > 520 Astronomia e scienze connesse
Depositing User: Marina Spanti
Date Deposited: 13 Mar 2020 09:58
Last Modified: 13 Mar 2020 09:58
URI: http://eprints.bice.rm.cnr.it/id/eprint/15111

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