NDLI: DC electric fields, associated plasma drifts, and irregularities observed on the C/NOFS satellite

Content Provider	IEEE Xplore Digital Library
Author	Pfaff, R. Freudenreich, H. Klenzing, J.
Copyright Year	2011
Description	Author affiliation: NASA/Goddard Space Flight Center, Greenbelt, MD, USA (Pfaff, R.; Freudenreich, H.; Klenzing, J.)
Abstract	Results are presented from the Vector Electric Field Investigation (VEFI) on the Air Force Communication/Navigation Outage Forecasting System (C/NOFS) satellite, a mission designed to understand, model, and forecast the presence of equatorial ionospheric irregularities. The VEFI instrument includes a vector DC electric field detector, a fixed-bias Langmuir probe operating in the ion saturation regime, a flux gate magnetometer, an optical lightning detector, and associated electronics including a burst memory. Compared to data obtained during more active solar conditions, the ambient DC electric fields and their associated E × B drifts are variable and somewhat weak, typically < 1 mV/m. Although average drift directions show similarities to those previously reported, eastward/outward during day and westward/downward at night, this pattern varies significantly with longitude and is not always present. Daytime vertical drifts near the magnetic equator are largest after sunrise, with smaller average velocities after noon. Little or no pre-reversal enhancement in the vertical drift near sunset is observed, attributable to the solar minimum conditions creating a much reduced neutral dynamo at the satellite altitude. The nighttime ionosphere is characterized by larger amplitude, structured electric fields, even where the plasma density appears nearly quiescent. Data from successive orbits reveal that the vertical drifts and plasma density are both clearly organized with longitude. The spread-F density depletions and corresponding electric fields that have been detected thus far have displayed a preponderance to appear between midnight and dawn. Associated with the narrow plasma depletions that are detected are broad spectra of electric field and plasma density irregularities for which a full vector set of measurements is available for detailed study. The VEFI data represents a new set of measurements that are germane to numerous fundamental aspects of the electrodynamics and irregularities inherent to the Earth's low latitude ionosphere.
Starting Page	1
Ending Page	1
File Size	136090
Page Count	1
File Format	PDF
ISBN	9781424451173
e-ISBN	9781424460519
DOI	10.1109/URSIGASS.2011.6050933
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-13
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Satellites Magnetic field measurement Magnetometers Electric fields Plasma density Saturation magnetization
Content Type	Text
Resource Type	Article

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Initial Results of DC Electric Fields, Associated Plasma Drifts, Magnetic Fields, and Plasma Waves Observed on the C/NOFS Satellite

DC Electric Fields and Associated Plasma Drifts Observed with the C/NOFS Satellite

Dc electric fields, associated plasma drifts, and irregularities observed on the c/nofs satellite

Initial results of dc electric fields, associated plasma drifts, magnetic fields, and plasma waves observed on the c/nofs satellite

Dc electric fields and associated plasma drifts observed with the c/nofs satellite

Persistent Longitudinal Variations of Plasma Density and DC Electric Fields in the Low Latitude Ionosphere Observed with Probes on the C/NOFS Satellite

Dc and structured electric fields observed on the c/nofs satellite and their association with longitude, plasma density, and solar activity

Structured dc electric fields with and without associated plasma density gradients observed with the c/nofs satellite

Persistent longitudinal variations of plasma density and dc electric fields in the low latitude ionosphere observed with probes on the c/nofs satellite

DC electric fields, associated plasma drifts, and irregularities observed on the C/NOFS satellite

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