Solar Contribution to Ionospheric Conductance Derived from Combined SuperDARN and Ground-Based Magnetometer Observations

Details Solar Contribution to Ionospheric Conductance Derived from Combined SuperDARN and Ground-Based Magnetometer Observations Solar Contribution to Ionospheric Conductance Derived from Combined SuperDARN and Ground-Based Magnetometer Observations

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa41a1408m&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA41A-1408

Physics

2400 Ionosphere (6929), 2407 Auroral Ionosphere (2704), 2423 Ionization Processes (7823), 2494 Instruments And Techniques, 2700 Magnetospheric Physics (6939)

Scientific paper

Empirical models of the solar contribution to ionospheric conductance (e.g., Moen and Brekke 1993; Senior et al. 1991) have largely been developed using incoherent scatter radar (ISR) observations; observations that provide the best measurement of height-integrated conductances. One disadvantage of this method is that the relationship between conductance and solar zenith angle is derived at a single location, i.e. at a single geomagnetic latitude. We present and compare similar empirical relationships derived from combining SuperDARN HF radar observations coincident with ground-based magnetometer measurements. Combining these observations to estimate the local height-integrated Hall conductance is a significantly more indirect method which requires several simplifying assumptions, however it does offer some advantages: This method allows for empirical relationships to be defined as a function of geomagnetic latitude or as a function of position relative to auroral boundaries. The shear size of the statistics also allows for finer binning of the observations, such as a function of magnetic local time or activity level.

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