Plasma observations of the active mother-daughter payload MAIMIK in the lower thermosphere

Details Plasma observations of the active mother-daughter payload MAIMIK in the lower thermosphere Plasma observations of the active mother-daughter payload MAIMIK in the lower thermosphere

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991p%26ss...39..453f&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 39, March 1991, p. 453-467. Austrian Research Council-supported research.

Physics

1

Atmospheric Density, Electron Guns, Payload Delivery (Sts), Plasma Diagnostics, Reentry Physics, Thermosphere, F Region, Signal Transmission

Scientific paper

Observations during the re-entry into the denser atmosphere of a mother-daughter payload equipped with a powerful electron gun are reported. The behavior of the payload potential, the flux of returning electrons and the propagation of an HF signal differed drastically at heights below approx. 130 km from what was observed in the F-region; in particular, the payload potential remained well below the accelerator voltage. A 10 MHz signal transmitted between daughter and mother showed variations both in phase and amplitude, whereas no such signatures were seen earlier in the flight when the two bodies were closer to each other. The most likely explanation is based on an increase in plasma density near the payloads in denser regions of the atmosphere. The dynamics of the effects are discussed in terms of ion plasma waves, although no firm conclusions can be drawn.

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