What question did this study set out to answer?

Investigate the characteristics and driving mechanisms of widespread ionospheric plasma instabilities in the polar cap E-region using comprehensive in situ and ground-based instrumentation.

July 1, 1976Geophysical Research Letters

Rocket‐borne wave, field, and plasma observations in unstable polar cap E‐region

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Investigate the characteristics and driving mechanisms of widespread ionospheric plasma instabilities in the polar cap E-region using comprehensive in situ and ground-based instrumentation.
Launched an instrumented rocket payload directly through an unstable polar cap E-region to measure wave direction, electric fields, and current density.
Coordinated rocket telemetry with ground-based ionosondes and magnetometers at two geographic sites and high-frequency radar backscatter at the launch site.
In situ measurements of wave propagation direction, electric field magnitude, and current density aligned closely with linear theory predictions for the Farley instability.
Observational geometry and wave characteristics ruled out the gradient-drift instability as the source of the measured polar cap plasma turbulence.

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Implication

In situ rocket sounding demonstrates Farley instability dynamics in the polar cap E-region, indicating linear theory accurately describes plasma waves under widespread unstable conditions.

Cite This Study

Olesen et al. (1976) studied this question.

synapsesocial.com/papers/6a6f7ec4f44fa9f079dcf217 https://doi.org/10.1029/gl003i007p00399

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Implication

In situ rocket sounding demonstrates Farley instability dynamics in the polar cap E-region, indicating linear theory accurately describes plasma waves under widespread unstable conditions.

Rocket‐borne wave, field, and plasma observations in unstable polar cap E‐region

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Discussion

Implication

Cite This Study

Rocket‐borne wave, field, and plasma observations in unstable polar cap E‐region

Key Points

Discussion

Implication

Cite This Study

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