Computer Science
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.495..443p&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
3
Meteor Radars, Hpla, Large Aperture Radars, Meteor
Scientific paper
The high power large aperture (HPLA) radar meteor method is presented. It is compared to the classical meteor radar method in terms of working frequency ranges, beam widths and power densities at meteor altitudes to show the basic differences. The classical meteor radars are sensitive to perpendicular meteor trails. The large aperture radars, with higher working frequencies and higher transmitted power, observe the meteoroid-atmosphere interaction at all look-angles. Due to the narrow beams, these radars mainly observe the population of numerous very small sporadic background particles. Almost no shower-related increase in fluxes has been observed in the EISCAT Geminid, Perseid and Leonid observations. Simultaneously with the meteor mode, the HPLA radars can operate in their usual incoherent scatter modes to observe the electron density variations in the background ionosphere. Thus evolution of sporadic E layers, their average ion composition and their relation to meteor activity can be monitored.
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