Computer Science – Sound
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2299z&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 20, p. 2299-2302
Computer Science
Sound
20
Atmospheric Boundary Layer, Electric Fields, Electrical Measurement, Energetic Particles, Mesosphere, Noctilucent Clouds, Polar Regions, Radar Echoes, Capacitors, Electrodynamics, Interferometers, International Cooperation, Russian Federation, Sounding Rockets, Spectral Signatures
Scientific paper
We report mesospheric electronic field structure in the vicinity of noctilucent clouds (NLC) and polar mesospheric summer echoes (PMSEs) measured on the DECIMALS-B rocket payload launched during the international rocket-radar campaign NLC-91 from Esrange, Sweden on August 10, 1991. Unusually large vertical E- fields, E(sub Z), about 100-300 mV/m on ascent and greater than 1 V/m on descent were detected at 82.5-84.5 km. The region of the large E(sub Z) was clearly limited by the NLC layer on the bottom and by the distinctly separated PMSE layer on the top. A narrow negative peak in the E(sub Z) height profile observed on ascent in the lower part of the NLC layer was apparently caused by the interaction of the field mill with impacting NLC particles possibly carrying negative charge. If the impact signature is due to single particles, their size is estimated to at least 0.5 microns and their concentration about 10(exp -4)/cu cm locally. Based on the light-scattering properties of NLC such massive particles can only be a minor part of the NLC population.
Cho John Y. N.
Swartz Wesley E.
Tyutin Aleksandr A.
Walchli Urs
Wilhelm Nathan
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