Multiple sounding rocket observations of mesospheric dust in the polar winter mesosphere

Details Multiple sounding rocket observations of mesospheric dust in the polar winter mesosphere Multiple sounding rocket observations of mesospheric dust in the polar winter mesosphere

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsa32a..11l&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SA32A-11

Computer Science

Sound

2407 Auroral Ionosphere (2704), 2427 Ionosphere/Atmosphere Interactions (0335), 2437 Ionospheric Dynamics

Scientific paper

In this poster we make an initial presentation of data from a winter 2002 sounding rocket campaign consisting of multiple observations of mesospheric dust. The campaign consists of four identically instrumented payloads carrying detectors for charged mesospheric dust particles. At the time of this writing, one payload has been flown and three flights are imminent. The payloads are to reach an altitude of 100 km in the nighttime mesosphere, and are flown from Poker Flat Research Range, Alaska, in conjunction with observations by the UAF sodium and iron resonance lidar system. Observations from the first flight show good correlations between structure seen in the charged dust altitude profile, structure seen in the neutral metal layers observed by the lidars, and structure in the plasma density seen by the onboard Langmuir probes. The dust detector is sensitive to positively and negatively charged dust particles with ram energies of 3 to 11~eV; that is, particles of approximately 10,000~amu. The charged dust densities (estimated to be approximately 5 to10 percent of the total dust density) seen are approximately 100 particles per cc, and the dust is negatively charged. Variations in the dust density of about ten percent are seen in conjunction with structure in the plasma density and with the neutral metal layers. The remaining three flights are planned to fly in sequence during the course of one night to study the temporal evolution of these structures.

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