Computer Science – Sound
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa41a1412s&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SA41A-1412
Computer Science
Sound
2407 Auroral Ionosphere (2704), 2411 Electric Fields (2712), 2427 Ionosphere/Atmosphere Interactions (0335), 2437 Ionospheric Dynamics, 2494 Instruments And Techniques
Scientific paper
The JOULE sounding rocket mission was designed to investigate structured Joule dissipation in the auroral ionosphere. JOULE was launched March 27, 2003 from Poker Flat, Alaska, during a substorm. The mission included two instrumented rockets and two chemical release (TMA) rockets. One of the instrumented payloads carried a Suprathermal Ion Imager (SII) that measured 2-D (energy/angle) distributions of the core (0- 8 eV) ion population at a rate of 125 per second. SII measured one component of the ion drift velocitiy perpendicular to the magnetic field and the field-aligned component of the ion drift velocity. We present results showing good agreement between ion drifts measured perpendicular to the geomagnetic field and those inferred from an ěc E×ěc B measurement, with signs of ion demagnetization as the payload reached the upper E region. Also, the SII shows evidence of downward field-aligned ion flows at altitudes of 140-170 km within a region of enhanced auroral precipitation.
Burchil J.
Clemmons James
Knudsen D.
Larsen Mark
Pfaff Robert
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