A model for estimating the relation between the Hall to Pedersen conductance ratio and ground magnetic data derived from CHAMP satellite statistics

Annales Geophysicae

Volumn 25, Issue 3, 2007, Pages 721-736

  Juusola, L ^a   Amm, O ^a   Kauristie, K ^a   Viljanen, A ^a  

^a FINNISH METEOROLOGICAL INSTITUTE   (Finland)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTROJET; ELECTRON DENSITY; ESTIMATION METHOD; GEOMAGNETIC FIELD; IONOSPHERE; MODEL; SATELLITE DATA; STATISTICAL DATA;

EID: 34047185364     PISSN: 09927689     EISSN: 14320576     Source Type: Journal    
DOI: 10.5194/angeo-25-721-2007     Document Type: Article

References (26)

1. Amm, O.: Direct determination of the local ionospheric Hall conductance distribution from two- dimensional electric and magnetic field data: Application of the method using models of typical ionospheric electrodynamic situations, J. Geophys. Res., 100, 21 473–21 488, 1995.
2. Amm, O.: Ionospheric elementary current systems in spherical coordinates and their application, J. Geomagn. Geoelectr., 49, 947–955, 1997.
3. Amm, O. and Viljanen, A.: Ionospheric disturbance magnetic field continuation from the ground to the ionosphere using spherical elementary current systems, Earth Planets Space, 51, 431–440, 1999.
4. Baumjohann, W., Pelunen, R. J., Opgenoorth, H. J., and Nielsen, E.: Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral zone currents: Current systems associated with local auroral break-ups, Planet. Space Sci., 29, 431–447, 1981.
5. Davies, J. A. and Lester, M.: The relationship between electric fields, conductances and currents in the high-latitude ionosphere: a statistical study using EISCAT data, Ann. Goephys., 7, 43–52, 1999.
6. Folkestad, K., Hagfors, T., and Westerlund, S.: EISCAT: An updated description of technical characteristics, Radio Sci., 18, 867–879, 1983.
7. Fukushima, N.: Generalized theorem for no ground magnetic effect of vertical currents connected with Pedersen currents in the uniform-conductivity ionosphere, Rep. Ionos. Space Res. Japan, 30, 35–40, 1976.
8. Hedin, A.E.: MSIS-86 thermospheric model, J. Geophys. Res., 92, 4649–4662, 1987.
9. Iijima, T. and Potemra, T. A.: Field-aligned currents in the dayside cusp observed by TRIAD, J. Geophys. Res., 81, 5971–5979, 1976.
10. Juusola, L., Amm., O., and Viljanen A.: One-dimensional spherical elementary current systems and their use for determining ionospheric currents from satellite measurements, Earth Planets Space, 58, 667–678, 2006.
11. Lester, M. and Davies, J. A.: High-latitude Hall and Pedersen conductances during substorm activity in the SUNDIAL-ATLAS campaign, J. Geophys. Res., 101, 26 719–26 728, 1996.
12. Lühr, H., Aylward, A., Buchert, S. C., Pajunpää, A., Pajunpää, K., Holmboe, T., and Zalewski, S. M.: Westward moving dynamic substorm features observed with the IMAGE magnetometer network and other ground-based instruments, Ann. Geophys., 16, 425–440, 1998.
13. Olsen, N.: A new tool for determining ionospheric currents from magnetic satellite data, Geophys. Res. Lett., 23, 3635–3638, 1996.
14. Opgenoorth, H. J., Persson, M. A. L., Pulkkinen, T. I., and Pellinen, R. J.: Recovery phase of magnetospheric substorms and its association with morning-sector aurora, J. Geophys. Res., 99, A3, 4115–4129, 1994.
15. Papitashvili, V. O., Christiansen, F., and Neubert, T.: A new model of field-aligned currents derived from high-precision satellite magnetic field data, Geophys. Res. Lett., 29(14), doi:10.1029/2001GL014207, 2002.
16. Press, W. H., Flannery, B. P., Teukolsky, S. A., and Vetterling, W. T.: Numerical Recipes, 2nd ed., pp. 973, Cambridge University Press, Cambridge, 1992.
17. Pulkkinen, A., Amm, O., Viljanen A., and BEAR Working Group: Ionospheric equivalent current distributions determined with the method of spherical elementary current systems, J. Geophys. Res., 108, 1053–1061, 2003.
18. Ritter, P., Lühr, H., Viljanen, A., Amm, O., Pulkkinen A., and Sillanpää, I.: Ionospheric currents estimated simultaneously from CHAMP satellite and IMAGE ground based magnetic field measurements: a statistical study at auroral latitudes, Ann. Geophys., 22, 417–430, 2004.
19. Robinson, R. M., Vondrak, R. R., Miller, K., Dabbs, T., and Hardy, D.: On calculating ionospheric conductances from the flux and energy of precipitating particles, J. Geophys. Res., 92, 2565–2569, 1987.
20. Russell, C. T. and McPherron, R. L.: Semiannual variation of geomagnetic activity, J. Geophys. Res., 78, 92–108, 1973.
21. Schlegel, K.: Auroral zone E-region conductivities during solar minimum derived from EISCAT data, Ann. Geophys., 6, 129–138, 1988.
22. Schunk, R. W. and Nagy, A. F.: Ionospheres: physics, plasma physics, and chemistry, Cambridge University Press, Cambridge, 2000.
23. Untiedt, J. and Baumjohann, W.: Studies of polar current systems using the IMS Scandinavian magnetometer array, Space Sci. Rev., 63, 245–390, 1993.
24. Vanhamäki, H., Amm, O., and Viljanen, A.: 1-Dimensional upward continuation of the ground magnetic field disturbance using spherical elementary current systems, Earth Planets Space, 55, 613–625, 2003.
25. Viljanen, A., Pulkkinen, A., Amm, O., Pirjola, R., Korja, T., and BEAR Working Group: Fast computation of the geoelectric field using the method of elementary current systems and planar Earth models, Ann. Geophys., 22, 101–113, 2004.
26. Weimer, D. R.: Maps of ionospheric field-aligned currents as a function of the interplanetary magnetic field derived from Dynamics Explorer 2 data, J. Geophys. Res., 106, 12 889–12 902, 2001.