Physics
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ldef.symp..487h&link_type=abstract
In NASA. Langley Research Center, LDEF: 69 Months in Space. First Post-Retrieval Symposium, Part 1 p 487-501 (SEE N92-23280 14-9
Physics
1
Cosmic Dust, Elliptical Orbits, Exposure, Long Duration Exposure Facility, Micrometeoroids, Olivine, Space Debris, Trailing Edges, Accumulators, Aluminum, Fragments, Gold, Position (Location), Pyroxenes
Scientific paper
The Chemistry of Micrometeoroids Experiment (CME) exposed approximately 0.8 sq. m of gold on the Long Duration Exposure Facility's (LDEF's) trailing edge (location A03) and approximately 1.1 sq. m of aluminum in the forward-facing A11 location. The most significant results to date relate to the discovery of unmelted pyroxene and olivine fragments associated with natural cosmic dust impacts. The latter are sufficiently large for detailed phase studies, and they serve to demonstrate that recovery of unmelted dust fragments is a realistic prospect for further dust experiments that will employ more advanced collector media. We also discovered that man-made debris impacts occur on the LDEF's trailing edge with substantially higher frequency than expected, suggesting that orbital debris in highly elliptical orbits may have been somewhat underestimated.
Bernhard Ronald P.
Brownlee Donald E.
Hoerz Friedrich
Laurance Mark R.
Messenger Scott
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