The effect of an on-orbit near encounter on the number flux density of micron sized particles

Details The effect of an on-orbit near encounter on the number flux density of micron sized particles The effect of an on-orbit near encounter on the number flux density of micron sized particles

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..915m&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 2: G-M p 915 (SEE N94-16173 03-91)

Computer Science

Earth Orbital Rendezvous, Interplanetary Dust, Micrometeoroids, Microphotographs, Particle Flux Density, Space Debris, Terrestrial Dust Belt, Diameters, Earth Orbits, Meteoroid Concentration, Particulate Sampling, Space Transportation System Flights

Scientific paper

Many materials and techniques have been developed by the authors to sample the flux of particles in Low Earth Orbit (LEO), and through regular insitu sampling of the flux in LEO, the materials and techniques have produced data which complement the data now being amassed by the Long Duration Exposure Facility (LDEF) research activities. Recent flight experiments on STS-32, STS-44, STS-46, and STS-52 have been conducted to develop an understanding of the spatial density as a function of size (mass) for particle sizes 1x10(exp -6) cm and larger. In addition to the enumeration of particle impacts, it was also the intent of these experiments that hypervelocity particles be captured and returned intact. Measurements were performed post-flight to determine the flux density, diameters, and subsequent effects on various optical, thermal control, and structural materials. During the course of the STS-44 mission, the Space Shuttle corrected its altitude by 26 km to evade a spent upper stage. The results of this near encounter suggests that a cloud of micron sized particles exist in the vicinity of the object. Data also suggest that the flux density is nearly two (2) orders of magnitude higher than background flux. A comparison of the number flux density along with microphotographs of the captured particles will be presented for the referenced shuttle flights.

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