Mid-latitude ionospheric irregularity spectral density as determined by ground-based GPS receiver networks

Lay, Erin H.; Parker, Peter A.; Light, Max; Carrano, Charles S.; Debchoudhury, Shantanab; Haaser, Robert A.

doi:10.1029/2018JA025364

Title: Mid-latitude ionospheric irregularity spectral density as determined by ground-based GPS receiver networks

Journal Article · Tue May 22 00:00:00 EDT 2018 · Journal of Geophysical Research. Space Physics

DOI:https://doi.org/10.1029/2018JA025364· OSTI ID:1440449

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^[1]; Light, Max ^[1];

^[2]; Debchoudhury, Shantanab ^[3];

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Boston College, Newton, MA (United States). Inst. for Scientific Research
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Dept. of Electrical Engineering

Abstract We present a new technique to experimentally measure the spatial spectrum of ionospheric disturbances in the spatial scale regime of 40–200 km. This technique produces a two‐dimensional (2‐D) spectrum for each time snapshot over two dense Global Positioning System (GPS) receiver networks (GPS Earth Observation Network in Japan and Plate Boundary Observatory in the Western United States). Because this technique created the spectrum from an instantaneous time snapshot, no assumptions are needed about the speed of ionospheric irregularities. We examine spectra from 3 days: one with an intense geomagnetic storm, one with significant lightning activity, and one quiet day. Radial slices along the 2‐D spectra provide one‐dimensional spectra that can be fit to a power law to quantify the steepness of the falloff in the spatial scale sizes. Continuous data of this type in a stationary location allow monitoring the variability in the 2‐D spectrum over the course of a day and comparing between days, as shown here, or even over a year or many years. We find that the spectra are highly variable over the course of a day and between the two selected regions of Japan and the Western United States. When strong traveling ionospheric disturbances (TIDs) are present, the 2‐D spectra provide information about the direction of propagation of the TIDs. We compare the TID propagation direction with horizontal wind directions from the Horizontal Wind Model. TID direction is correlated with the horizontal wind direction on all days, strongly indicating that the primary source of the TIDs measured by this technique is tropospheric.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1440449

Alternate ID(s):: OSTI ID: 1441015

Report Number(s):: LA-UR-18-21184; TRN: US1900738

Journal Information:: Journal of Geophysical Research. Space Physics, Vol. 123, Issue 6; ISSN 2169-9380

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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