Three‐Dimensional Mapping of Lightning‐Produced Ionospheric Reflections

Malins, J. B.; Obenberger, K. S.; Taylor, G. B.; Dowell, Jayce

doi:10.1029/2019rs006857

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…Detailed procedures on how such studies could be carried out are beyond the scope of the current paper. The TP technique may be complementary to the recently developed technique of using lightning as a HF source to produce ionograms (Malins et al, 2019; Obenberger et al, 2018).…”

Section: Possible Use Of Tps For Studying the Ionospherementioning

confidence: 99%

Propagation Teepee: A Possible High‐Frequency (15–30 MHz) Remote Lightning Signature Identified by Citizen Scientists

Fung

Typinski²,

Flagg³

et al. 2020

Geophysical Research Letters

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A high‐frequency spectral feature is identified in ground‐based spectrograph data at 15–30 MHz. The feature, likely of terrestrial origin, is often recorded by a group of citizen scientists (the Spectrograph User Group) whose main interest is to observe Jupiter's radio emissions. The feature appears as radio band noise enhancement in which the frequency of enhancement increases and then decreases with time, forming a “triangular spectral feature.” The teepee tent shape leads to its name (TP for short). TPs usually have well‐defined leading and trailing edges. While some TPs occur in isolation, they are often seen in groups, distributed either in time or in apex frequency. While most TPs appear diffuse, close‐up views of a few TPs reveal that they actually consist of discrete bursts, highly suggestive of lightning strokes as possible radiation sources. Here, we investigate the possible generation of TPs by ionospheric reflection of radiation from remote lightning storms.

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Section: Possible Use Of Tps For Studying the Ionospherementioning

confidence: 99%

Propagation Teepee: A Possible High‐Frequency (15–30 MHz) Remote Lightning Signature Identified by Citizen Scientists

Fung

Typinski²,

Flagg³

et al. 2020

Geophysical Research Letters

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“…Data were collected at two distinct locations in New Mexico, LWA-1 and LWA-SV. One dataset was collected at the Long Wavelength Array (LWA)-SV station at the Sevilleta National Wildlife Refuge in central New Mexico [39]. The other set of data was obtained using the LWA-1 radio telescope array, which is positioned in northern New Mexico and has a diameter of 100 m. This radio telescope array is associated with the University Radio Observatory [40].…”

Section: Sdr Experimental Methodsmentioning

confidence: 99%

Measuring Power of Earth Disturbances Using Radio Wave Phase Imager

Sharif,

Herring

2023

J. Imaging

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Numerous studies have investigated ionospheric waves, also known as ionospheric disturbances. These disturbances exhibit complex wave patterns similar to those produced by solar, geomagnetic, and meteorological disturbances and human activities within the Earth’s atmosphere. The radio wave phase imager described herein measures the power of the ionospheric waves using their phase shift seen in phase images produced by the Long Wavelength Array (LWA) at the New Mexico Observatory, a high-resolution radio camera. Software-defined radio (SDR) was used for processing the data to produce an amplitude image and phase image. The phase image revealed the ionospheric waves, whereas the amplitude image could not see them. From the phase image produced from the carrier wave received at the LWA, the properties of the ionospheric waves have been previously characterized in terms of their energy and wave vector. In this study, their power was measured directly from the phase shift of the strongest set of ionospheric waves. The power of these waves, which originated at Albuquerque, the local major power consumer, was 15.3 W, producing a power density of 0.018 W/m2. The calculated power density that should be generated from the local power generating stations around Albuquerque was also 0.018 W/m2, in agreement with the experimentally measured value. This correspondence shows that the power generated by power stations and being consumed is not lost but captured by the ionosphere.

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“…The LWA-SV and LWA-1 (University Radio Observatory) in central New Mexico captured radio wave frequencies from 3 MHz to 88 MHz, and each array consisted of 256 pairs of dipole-type antennas, while each pair of antennas had orthogonal polarizations on one stand. Antennas of the LWA-SV were arranged in a 110 m by 100 m north-south area distributed in about 100 m of aperture, as seen in Figure 2 [29]. Array geometry of the LWA-1 was within a 100 m (east-west) × 110 m (north-south) elliptical shape, as illustrated in Figure 3 [30].…”

Section: Lwa-sv and Lwa-1 Description Of New Mexico Experimentsmentioning

confidence: 99%

Locating Earth Disturbances Using the SDR Earth Imager

et al. 2022

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The Radio Wave Phase Imager uses monitoring and recording concepts, such as Software Defined Radio (SDR), to image Earth’s atmosphere. The Long Wavelength Array (LWA), New Mexico Observatory is considered a high-resolution camera that obtains phase information about Earth and space disturbances; therefore, it was employed to capture radio signals reflected from Earth’s F ionization layer. Phase information reveals and measures the properties of waves that exist in the ionization layer. These waves represent terrestrial and solar Earth disturbances, such as power losses from power generating and distribution stations. Two LWA locations were used to capture the ionization layer waves, including University of New Mexico’s Long Wavelength Array’s LWA-1 and LWA-SV. Two locations of the measurements showed wavevector directions of disturbances, whereas the intersection of wavevectors determined the source of the disturbance. The research described here focused on measuring the ionization layer wave’s phase shifts, frequencies, and wavevectors. This novel approach is a significant contribution to determine the source of any disturbance.

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Three‐Dimensional Mapping of Lightning‐Produced Ionospheric Reflections

Cited by 6 publications

References 16 publications

Propagation Teepee: A Possible High‐Frequency (15–30 MHz) Remote Lightning Signature Identified by Citizen Scientists

Propagation Teepee: A Possible High‐Frequency (15–30 MHz) Remote Lightning Signature Identified by Citizen Scientists

Measuring Power of Earth Disturbances Using Radio Wave Phase Imager

Locating Earth Disturbances Using the SDR Earth Imager

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