Distinguishing sub-micrometer man-made debris from interplanetary dust using near-Earth satellites.

Details Distinguishing sub-micrometer man-made debris from interplanetary dust using near-Earth satellites. Distinguishing sub-micrometer man-made debris from interplanetary dust using near-Earth satellites.

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...301..914v&link_type=abstract

Astronomy and Astrophysics, v.301, p.914

Astronomy and Astrophysics

Astrophysics

Space Vehicles, Interplanetary Medium, Dust

Scientific paper

We show that even if the interplanetary dust of sub-micron size is originally neutral, it would become highly ionized by solar ultraviolet radiation. Assuming interplanetary dust to be drifting in as neutral particles at 10km/s, we derive the probable charge that they may pick up during their motion in the solar system. Using this value for the charge, we analyze the particle arrival pattern of the interplanetary dust in low earth orbits due to modulation by the geomagnetic field. Using an accurate model of the geomagnetic field from the International Geophysical Reference Field (IGRF), we show that the interplanetary dust would arrive at high latitudes only. We then show that since man-made debris is released at very low altitude, it would arrive isotropically even if it is heavily charged. Hence even from a low earth orbit satellite, it may be possible to distinguish man-made debris from the interplanetary dust.

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