HR: 0830h
AN: SA51B-0510    [PDF]
TI: Statistics of meteor-head echo observations using the Jicamarca 50 MHz radar
AU: Chau, J L
EM: chau@jro.igp.gob.pe
AF: Radio Observatorio de Jicamarca, Instituto Geofisico del Peru, Apartado 13-0207, Lima, 13 Peru
AU: Woodman, R F
EM: ronw@geo.igp.gob.pe
AF: Radio Observatorio de Jicamarca, Instituto Geofisico del Peru, Apartado 13-0207, Lima, 13 Peru
AU: * Janches, D
EM: djanches@naic.edu
AF: Arecibo Observatory, HC3 Box 53995, Arecibo, 00612 Puerto Rico
AB: We present the statistical results of recent observations of meteor-head echoes obtained with the high power-aperture Jicamarca 50 MHz radar. Our observations were concentrated at the beginning on Leonids events, specifically 2001 and 2002, nonetheless we have recently started observations at different seasons in 2003. Statistics are presented for most of the meteor parameters we are able to estimate, including among other the absolute velocities, azimuth and elevation of velocity vectors, and decelerations. So far we have not seen any evidence of Leonids signatures. Moreover, the velocity distribution of the meteors with respect to the Earth's frame of reference is clustered around the Apex, within $\pm 10^\circ$ transverse to the Ecliptic and no more than a few degrees in heliocentric longitude in the Ecliptic plane. Preliminary estimates of meteor fluxes, based on the meteor decelerations, are compared to the Arecibo estimates and those obtained with optical instruments.
DE: 0340 Middle atmosphere--composition and chemistry
DE: 2129 Interplanetary dust
DE: 5405 Atmospheres--composition and chemistry
DE: 6213 Dust
DE: 6245 Meteors
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting