Other
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.5103s&link_type=abstract
Journal of Geophysical Research, vol. 86, June 10, 1981, p. 5103-5111. NASA-supported research.
Other
4
Ablation, Aerodynamic Heating, Atmospheric Entry, Meteoroid Showers, Tektites, Atmospheric Effects, Gravitational Effects, Surface Geometry, Surface Temperature, Wakes, Tektites, Ablation, Surface, Temperatures, Heating, Data, Models, Wakes, Origin, Features, Atmosphere, Motions, Observations, Melting, Velocity
Scientific paper
Observations of ablation markings on tektite surfaces reveal that a large variation in aerodynamic heating must have occurred among the members of a swarm during atmospheric entry. In a few cases, the existence of jagged features indicates that these tektite surfaces may have barely reached the melting temperature. Such an observation seems to be incompatible with the necessarily large heating rates suffered by other tektites which exhibit the ring wave melt flow. A reconciliation is proposed in the form of a wake shielding model which is a natural consequence of swarm entry. Calculations indicate that the observed ablation variations are actually possible for swarm entry at greater than escape velocity. This aerodynamic conclusion provides support for the arguments favoring extraterrestrial origin of tektites.
Chen Kaiyou
O'Keefe John A.
Sepri P.
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