Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Annales Geophysicae Année : 1998

Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images

Résumé

Ionospheric conductivity is not very easily measured directly. Incoherent scatter radars perhaps offer the best method but can only measure at one point in the sky at any one time and are limited in their time resolution. Statistical models of average conductivity are available but these may not be applied to individual case studies such as substorms. There are many instances where a real-time estimate of ionospheric conductivity over a large field-of-view is highly desirable at a high temporal and spatial resolution. We show that it is possible to make a reasonable estimate of the noctural height-integrated Pedersen conductivity, or conductance, with a single all-sky TV camera operating at 557.7 nm. This is not so in the case of the Hall conductance where at least two auroral wavelengths should be imaged in order to estimate additionally the energy of the precipitating particles.
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Dates et versions

hal-00316393 , version 1 (18-06-2008)

Identifiants

  • HAL Id : hal-00316393 , version 1

Citer

M. J. Kosch, T. Hagfors, K. Schlegel. Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images. Annales Geophysicae, 1998, 16 (5), pp.583-588. ⟨hal-00316393⟩
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