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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Total electron content and equivalent slab thickness of midlatitude ionosphere determined from radio transmissions of Transit IVA Earth satellite
Alouette observations in midlatitudes and electron densities and plasma scale heights in topside ionosphere
Midlatitude ionospheric currents detected by rocketborne rubidium vapor magnetometers in Nike- Apache rockets
Oblique echo presence during winter nights on auroral and subauroral latitudes ionograms, analyzing electron number density of nighttime F region in midlatitude trough vicinity
Correlation of measurements of precipitated electrons with ionospheric effects of winter anomaly in midlatitude D layer
Midlatitude neutral thermosphere density and temperature measurements
Rocket measurements of electron cooling rates in midlatitude and auroral zone thermosphere
Midlatitude topside spread F studied by Alouette 1 ionograms recorded at Woomera
Midlatitude neutral thermosphere density and temperature measurements, noting effect of atomic oxygen adsorption by instruments
Ionospheric vertical columnar electron content at midlatitudes near solar cycle minimum based on Faraday rotation data from Explorer 22
Midlatitude ionization trough during rising solar cycle using data from Explorer 22
Altitude effect on ion concentration in midlatitude trough and plasmasphere
Explorer observations of large temporal variations of midlatitude outer zone energetic electron intensities interpreted as redistribution during geomagnetic disturbances
Stable midlatitude red arc observation by Alouette 2 satellite for electron temperature and density structure measurement, calculating intensity and extent
Photoelectron production and escape flux at midlatitudes, using spectrometric measurements from ISIS-1 satellite
Midday ion composition altitude variations in midlatitude trough region and plasmasphere, observing light ion concentrations
The temporal development of the latitudinal position of the 600 km midlatitude electron density trough at dawn and dusk during the period 25-27 May 1967, which encompassed a large magnetic storm, was measured by the RF capacitive probe on the polar orbiting Ariel 3 satellite. The substorm-related changes in the L coordinate of the trough minimum and the point of most rapid change of density gradient on the low latitude side of the trough are similar. Oscillations of the trough position at dusk are in phase with substorm activity whereas movement of the trough at dawn is only apparent with the onset of the large storm. Near dusk there is evidence of structure in the form of a tail-like extension of the plasmasphere at the peak of the storm. Detailed model calculations assuming a spatially invariant equatorial convection E field which varies in step with K sub p index reproduces much of the observed behavior, particularly at dusk, and shows that more than one plasmapause-type transition may be identifiable in the trough region.
The positive ion composition within a midlatitude sporadic E layer has been measured with the aid of a rocket-borne ion mass spectrometer launched from El Arenosillo, Spain on July 3, 1972 at 0743 LMT. Ionograms taken before and during the rocket flight showed a developing sporadic E layer near 114 km. Rocket data showed peaks in electron density and metallic ions at this same height. Both the maximum and total content of the metals are observed to be greater on the downleg than the upleg measurement.