Space Technology 5 measurements of field-aligned currents: Separating spatial and temporal variations

Details Space Technology 5 measurements of field-aligned currents: Separating spatial and temporal variations Space Technology 5 measurements of field-aligned currents: Separating spatial and temporal variations

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm11a0298l&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM11A-0298

Physics

2407 Auroral Ionosphere (2704), 2409 Current Systems (2721), 2431 Ionosphere/Magnetosphere Interactions (2736), 2721 Field-Aligned Currents And Current Systems (2409), 2736 Magnetosphere/Ionosphere Interactions (2431)

Scientific paper

We report the first results of magnetic field measurements of field-aligned currents by Space Technology 5 (ST5) constellation mission. ST5 is a three micro-satellite constellation deployed into a 300 x 4500 km, dawn dusk, sun synchronous polar orbit in a string-of-pearl configuration. Although the short mission is designed to flight validate new technologies, the constellation mission returned unprecedented data as they flied in formation and made simultaneous multi-point measurements of the magnetic field through Earth's dynamic ionospheric current systems. During the three-month mission duration, the ST5 constellation made over 2000 passes across the Earth's polar ionosphere, and a substantial volume of magnetic field data were taken over a range of inter-satellite spacing (~ 50 - 4000 km). These separations allow us to separate spatial versus temporal structures of auroral field-aligned currents over a wide range of spatial (~ 50 - 4000 km) and temporal (~ 5 s - 10 min) scales. In the presentation, we report the first results of ST5 observations focusing on the field-aligned currents' spatial and temporal variability.

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