Modeling the global micrometeor input function in the upper atmosphere observed by high power and large aperture radars

Details Modeling the global micrometeor input function in the upper atmosphere observed by high power and large aperture radars Modeling the global micrometeor input function in the upper atmosphere observed by high power and large aperture radars

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgra..11107317j&link_type=abstract

Journal of Geophysical Research, Volume 111, Issue A7, CiteID A07317

Physics

22

Planetary Sciences: Solar System Objects: Meteorites And Tektites (1028, 3662), Planetary Sciences: Comets And Small Bodies: Dust, Interplanetary Physics: Interplanetary Dust, Ionosphere: Instruments And Techniques, Atmospheric Processes: Instruments And Techniques

Scientific paper

We report initial results of an effort to model the diurnal and seasonal variability of the meteor rate detected by high power and large aperture (HPLA) radars. The model uses Monte Carlo simulation techniques and at present assumes that most of the detected particles originate from three radiant distributions with the most dominant concentrated around the Earth's apex. The other two sources are centered 80° in ecliptic longitude to each side of the apex and are commonly known as helion and antihelion. To reproduce the measurements, the apex source flux was set to provide ~70% of the total number of particles while the other ~30% is provided by the combined contribution of the two remaining sources. The results of the model are in excellent agreement with observed diurnal curves obtained at different seasons and locations using the 430 MHz Arecibo radar in Puerto Rico, the 50 MHz Jicamarca radar in Perú, and the 1.29 GHz Sondrestrom radar in Greenland. To obtain agreement with the observed diurnal and seasonal variability of the meteor rate, an empirical atmospheric filtering effect was introduced in the simulation which prevents meteors with low-elevation radiants (<=20°) from being detected by the radars at mesospheric altitudes. The filtering effect is probably produced by a combination of factors related to the interaction of the meteor with the air molecules such as electron production and/or the ablation at higher altitudes. On the basis of these results we calculate the micrometeor global, diurnal, and seasonal input in the upper atmosphere.

Affiliated with

Also associated with

No associations

Rating

Modeling the global micrometeor input function in the upper atmosphere observed by high power and large aperture radars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Modeling the global micrometeor input function in the upper atmosphere observed by high power and large aperture radars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling the global micrometeor input function in the upper atmosphere observed by high power and large aperture radars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1794194