Mapping electrodynamic features of the high-latitude ionosphere from localized observations: Technique

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA093iA06p05741· OSTI ID:5256428

Richmond, A D ^[1]; Kamide, Y ^[2]

---

1. National Center for Atmospheric Research, Boulder, CO (USA)
2. Kyoto Univ. (Japan)

The authors present a new technique for mapping high-latitude electric fields and currents and their associated magnetic variations from sets of localized observational data. The technique generalizes earlier ones that were designed to deduce these electrodynamic features from ground-based magnetometer data alone. In the new technique, many different types of measurements can potentially be used: electric fields from radars and satellites; electric currents from radars; and magnetic perturbations at the ground and at satellite heights. The technique also makes use of available statistical information about averages and variances of the electrodynamic fields. One of its advantages over earlier techniques is that it quantifies the errors inherent in the mapped fields, taking into account the distribution of available data, their errors, and the statistical variances of the fields. A related application of the procedure is used for estimating the distributions of high-latitude ionospheric conductances, using available direct and indirect measurements. The new technique is illustrated by application to an example of a substorm that was previously analyzed by Kamide et al. (1982a) with an earlier technique. The new technique tends to yield much simpler patterns of high-latitude ionsopheric convection in regions of low ionospheric conductance. When magnetometer data alone are used, as in this example, the statistical uncertainty in the derived electric fields is largest in regions of low conductance, because the electric fields in these regions have little influence on the magnetic perturbations. A companion paper (Richmond et al., this issue) presents a detailed application of the technique using multiple data sets.

• OSTI ID: 5256428
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 93:A6; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONVECTION
CURRENTS
EARTH ATMOSPHERE
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
ELECTRODYNAMICS
ENERGY TRANSFER
HEAT TRANSFER
IONOSPHERE
MAGNETIC BAYS
MAGNETIC FIELDS
MAPPING
MASS TRANSFER
MATHEMATICS
MEASURING INSTRUMENTS
PHYSICAL PROPERTIES
PLANETARY IONOSPHERES
RADAR
RANGE FINDERS
SATELLITES
STATISTICS