Computer Science – Sound
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm51a..06m&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM51A-06
Computer Science
Sound
2483 Wave/Particle Interactions, 2494 Instruments And Techniques, 2407 Auroral Ionosphere (2704), 2451 Particle Acceleration
Scientific paper
We present initial results from the SIERRA sounding rocket launched at 08:23:05 UT on January 14th 2002 from Poker Flat Research Range, Alaska. The three payloads of SIERRA intersected an extensive midnight sector breakup aurora. By using highly precise multiple point measurements, the goal of the campaign is to investigate the wave-particle interactions associated with ion energization and outflow processes in upward and return current region aurora. The SIERRA main payload carried a rich array of particle instrumentation measuring the full pitch angle and energy spectra of electron, hydrogen, and oxygen ions in the topside ionosphere. Identical 10 eV fixed-energy ion analyzers were carried on all three payloads. Additionally, a new instrument measured the thermal electron population, particularly looking for correlation with wave activity, evidence of ambient heating, and field aligned or anti-parallel drift components. Each subpayload also measured wave activity with GPS accurate timing. The data show several varieties of transverse ion acceleration, including localized bursts of ion and wave activity seen by all three payloads while between regions of inverted V precipitation. Also, poleward of the main arcs, we observe periods of ion conics and enhancement of thermal electrons streaming along the magnetic field. The particle data will be presented to provide an overview of the flight, examine interesting intervals and search for correlations with wave activity. In addition we present an initial assessment of the performance of our new thermal electron detector. All of these data will be used to study the fine-scale structure and resolve temporal versus spatial ambiguities in auroral wave-particle interactions.
Arnoldy Roger
Kintner Paul
Klatt Eric
LaBelle James
Lynch Kennda
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