Measurements of Solid Micro-Particle Fluxes on Geosynchronous Orbit

Details Measurements of Solid Micro-Particle Fluxes on Geosynchronous Orbit Measurements of Solid Micro-Particle Fluxes on Geosynchronous Orbit

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996esasp.392..343n&link_type=abstract

Environment Modelling for Space-based Applications, Symposium Proceedings (ESA SP-392). ESTEC Noordwijk, 18-20 September 1996. E

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On the geosynchronous GORIZONT-41 spacecraft in period since 1993, December to 1994, June, measurements of flux density of solid particles having masses m>0.000 000 001 g were conducted. The detector consists of two thin metal-dielectric-metal (MDM) structures, which were installed at the distance of 10 cm between them one above another. The area of the detector window was 230 cm2. Time-of-flight method was used for measurement of particle velocities, which punched the top MDM-structure. A range of velocity measurements was v=1-70 km/s. Also, there was an opportunity for registration of signals from slow particles, which did not punch the top MDM-structure. The registered particle velocity distribution had maximum near v=15-25 km/s. Average density for high velocity (v>12 km/s) particle flux was ~0.000064 1/m2/s. These particles are interpreted as natural meteoric particles. For the velocity interval v=1-12 km/s, the flux density of 0.000013 1/m2/s was obtained, and for particles with velocities v<1 km/s the flux density was 0.000061 1/m2/s. The last two groups of particles are interpreted as particles having an artificial origin. At interpretation of the device indications, there are certain difficulties, stipulated by ambiguity of relations between velocities, weights and sizes of the registered particles.

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