Computer Science – Sound
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa13b1889b&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA13B-1889
Computer Science
Sound
[2403] Ionosphere / Active Experiments, [2409] Ionosphere / Current Systems, [2437] Ionosphere / Ionospheric Dynamics
Scientific paper
The Dynamo sounding rocket mission is a NASA/GSFC--led experiment to study the dayside ionospheric dynamo with a combination of instruments that measure the electromagnetic fields, upper atmosphere winds, and the ambient charged and neutral particle populations. The primary objective is to determine the constituents of the dynamo current equation and to determine the degree to which the dynamo current is sustained via neutral winds, DC electric fields, or both. The MAG experiment is a JPL/UCLA collaboration that uses a miniaturized vector-helium magnetometer (VHM) with technology heritage from the, Ulysses and Cassini missions. The experiment objective is to measure the magnetic field and, from its altitude variation profile, the horizontal current density. The low-mass and power instrument uses a laser pumped helium sensor together with a sigma-delta analog to digital convertor for signal digitization, (drawing from recent developments in fluxgate magnetometer miniaturization). We describe instrument performance and initial estimates of the ionospheric current system measured during the mission. Ground magnetometers from THEMIS as well as locally deployed portable units provide contextual observations of the global ionospheric current system and its evolution in time during this rocket flight.
Angelopoulos Vassilis
Bernal I.
Dawson Olivia
Murphy Neil
Pfaff Robert F.
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