Two-frequency meteor observations using the Advanced Research Project Agency Long Range Tracking and Instrumentation Radar (ALTAIR)

Details Two-frequency meteor observations using the Advanced Research Project Agency Long Range Tracking and Instrumentation Radar (ALTAIR) Two-frequency meteor observations using the Advanced Research Project Agency Long Range Tracking and Instrumentation Radar (ALTAIR)

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.495..451h&link_type=abstract

In: Proceedings of the Meteoroids 2001 Conference, 6 - 10 August 2001, Kiruna, Sweden. Ed.: Barbara Warmbein. ESA SP-495, Noordw

Computer Science

1

Meteors, Radar Observations

Scientific paper

We present a sample of radar meteors observed during the November 1998 Leonid shower using the Advanced Research Project Agency (ARPA) Long Range Tracking and Instrumentation Radar (ALTAIR). Approximately 29 minutes of VHF data which produced over 900 VHF head echoes and 17 minutes of simultaneous UHF data were collected, which resulted in over 500 head echo detections. These data were analyzed to determine frequency-dependent radar cross section (RCS) characteristics [Close]. The techniques outlined here for determining meteor velocity from ALTAIR data produced a meteor distribution with a peak number of meteors at 56 km/s, consistent with viewing the Northern Apex meteor source. The angle between the radar line of sight and geomagnetic field shows a strong correlation with the radar's ability to detect nonspecular meteor trails. In addition, the range, azimuth and elevation angle data were used to compute the 3-d velocity of the head echoes. The first head echo that was detected using three frequencies (160, 422, and 1320 MHz) is also discussed.

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