Statistics – Computation
Scientific paper
Apr 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11604312z&link_type=abstract
Journal of Geophysical Research, Volume 116, Issue A4, CiteID A04312
Statistics
Computation
Planetary Sciences: Solar System Objects: Meteors, Radio Science: Radar Astronomy, Computational Geophysics: Model Verification And Validation, Biogeosciences: Remote Sensing
Scientific paper
We describe a new analysis of a set of 32 UHF meteor radar traces recorded with the 422 MHz Advanced Research Project Agency Long-Range Tracking and Identification Radar facility in November 1998. Emphasis is on the absolute velocity measurements and inferences that can be drawn from them regarding the meteoroid masses and mass densities. We find that the 3-D velocity versus altitude data can be fitted as quadratic functions of the path integrals of the atmospheric densities versus distance, and deceleration rates derived from those fits all show the expected behavior of increasing with decreasing altitude. We also describe a computer model of the coupled processes of collisional heating, radiative cooling, evaporative cooling and ablation, and deceleration for meteoroids composed of defined mixtures of mineral constituents. For each of the cases in the data set, we ran the model starting with the measured initial velocity and trajectory inclination and with various trial values of the quantity mρs2 (initial mass times mass density squared) and then compared the computed deceleration versus altitude curves versus the measured ones. In this way we arrived at the best fit values of the mρs2 for each of the measured traces. Then further, assuming various trial values of the density ρs, we compared the computed mass versus altitude curves with similar curves for the same set of meteoroids determined previously from the measured radar cross sections and an electrostatic scattering model. In this way we arrived at estimates of the best fit mass densities ρs for each of the cases.
Close Sigrid
Colestock Patrick L.
Loveland Rohan
MacDonell A.
Zinn Joel
No associations
LandOfFree
Analysis of ALTAIR 1998 meteor radar data 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 Analysis of ALTAIR 1998 meteor radar data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of ALTAIR 1998 meteor radar data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1361906