Computer Science
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.473..237c&link_type=abstract
In: Proceedings of the Third European Conference on Space Debris, 19 - 21 March 2001, Darmstadt, Germany. Ed.: Huguette Sawaya-L
Computer Science
2
Meteors, Radar Observations
Scientific paper
We present a sample of radar meteors detected during the November 1998 Leonid shower that were collected using the ARPA Long Range Tracking and Instrumentation Radar (ALTAIR) at 160 and 422 MHz. A total of 900 VHF and 500 UHF head echoes were collected near the peak of the shower; these data produced a detection rate of approximately 1 VHF head echo every 2 seconds, which is the highest rate recorded by any sensor. These data were analyzed to determine frequency-dependent radar cross-section (RCS) and true 3-D velocity, as well as altitude and aspect angle trends. These data are the first to reveal that the shape and strength of the head echo varies as a function of detection angle. In addition, the azimuth and elevation data were used to compute the deceleration as a function of time, which can be utilized to compute the radius/density of the meteoroid itself. The majority of these meteoroids had mass ranges between 10-6 and 10-3 grams and diameters less than 2 mm.
Close Sigrid
Hunt Stephen
McKeen Fred
Oppenheim Meers M.
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