National Aeronautics and Space Administration

Living With A Star

Targeted Research and Technology

Towards a Predictive Model of Equatorial Ionospheric F-region Irregularities

ROSES ID: NRA-01-OSS-01      Selection Year: 2002      

Program Element: Independent Investigation: Geospace LWS

Principal Investigator: Michael J. Keskinen

Affiliation(s): Naval Research Laboratory


The objective of the proposed research is to develop a model of the spatial and temporal structure of the plasma density irregularities in the equatorial and low latitude F-region ionosphere for a range of geophysical conditions. The focus will be on ionospheric irregularities that can lead to disruptive effects on communications, navigation, and radar systems. The approach will be to study the nonlinear evolution of the Rayleigh-Taylor instability in the equatorial ionosphere for a range of conditions. The effects of pre-reversal vertical drifts, neutral wind effects, background Pedersen conductivity effects, and magnetic storm conditions will be studied. A predictive model of equatorial spread-F irregularities will be developed.


Performance YearReferenceInvestigation TypeActions
1Equatorial Ionospheric Irregularities , Ionospheric Scintill...
not set


Performance YearReferenceActions
1Ossakow, S. L.; Keskinen, M. J.; Fejer, B.; (2004), T...

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