The Solar Imaging Radio Array: Space-Based Imaging of Solar, Heliospheric, Magnetospheric, and Astrophysical Sources at Frequencies below the Ionospheric Cutoff

Details The Solar Imaging Radio Array: Space-Based Imaging of Solar, Heliospheric, Magnetospheric, and Astrophysical Sources at Frequencies below the Ionospheric Cutoff The Solar Imaging Radio Array: Space-Based Imaging of Solar, Heliospheric, Magnetospheric, and Astrophysical Sources at Frequencies below the Ionospheric Cutoff

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..345..476m&link_type=abstract

From Clark Lake to the Long Wavelength Array: Bill Erickson's Radio Science ASP Conference Series, Vol. 345, Proceedings of the

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Solar Imaging Radio Array (SIRA) is a mission concept for space-based, interferometric imaging of solar and interplanetary radio emission at frequencies below the Earth's ionospheric cutoff. Observing in a frequency range of ˜30 kHz to 15 MHz, SIRA will observe the radio emission from shocks driven by fast coronal mass ejections (CMEs). The radio emissions permit tracking the leading boundaries of CMEs from ˜2 Rs to 1 AU. When a CME impacts Earth's magnetosphere, the dynamic response will be imaged in the light of magnetospheric radio emissions, such as auroral kilometric radiation (AKR), scattered on magnetospheric density gradients. The near-term possibility for a SIRA mission is based on a NASA MIDEX-class mission, consisting of a single constellation of ˜16 microsats located quasi-randomly on a spherical shell of ˜10 km diameter. Such a mission is the logical next step in space-based solar radio observations, as well as offering a unique space weather prediction capability for the NASA Exploration Initiative. SIRA will also serve a valuable role as a pathfinder for more complex constellation and interferometry missions.

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