Other
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994metic..29q.538s&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 29, no. 4, p. 538
Other
Aerobraking, Approximation, Depletion, Mass, Meteor Trails, Meteoroids, Enthalpy, Least Squares Method, Parameterization, Trajectories
Scientific paper
A method of determination of a meteoroid preatmospheric mass and effective enthalpy of their destruction based on observational data is developed. An inverse problem of determination of a ballistic coefficient and mass-loss parameter is solved by means of the best approximation of the observed part of trajectories by the exact solution of aerobraking and mass-loss equations. The best approximation is reached by the least-squares technique. As an approaching function, the solution with constant aerodynamical coefficients is used. For the determination of the preatmospheric mass and effective enthalpy, approaching values of the atmospheric parameters and some meteoroid parameters are prescribed. Calculations are conducted for the largest fireballs of the Prairie Network in North America. The result is that the photometric mass exceeds that determined by aerobraking dynamical mass in greater than or equal to 10 times in all cases. Values of effective enthalpy for the majority of the biggest fireballs of the Prairie Network are in rather narrow ranges. Comparison of ballistic coefficients, ablation parameters, and preatmospheric masses with some results of other authors shows a good agreement. A new exact solution of aerobraking and mass-loss equations by variable aerodynamical coefficients is received.
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