Observations and Modeling of Traveling Ionospheric Disturbance Signatures From an Australian Network of Oblique Angle‐of‐Arrival Sounders

Heitmann, Andrew; Cervera, M. A.; Gardiner-Garden, Robert S.; Holdsworth, David A.; MacKinnon, Andrew D.; Ward, B. D.

doi:10.1029/2018rs006613

Cited by 16 publications

(6 citation statements)

References 57 publications

(80 reference statements)

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“…(2018) have shown the utility of distributed HF data in reconstructing ionospheric electron densities leading to the formation of equatorial plasma bubbles, while Heitmann et al. (2018) have used an oblique sounder network with angle‐of‐arrival determination capability to identify traveling ionospheric disturbances in Australia. Oblique sounder networks also exist for traveling ionospheric disturbance identification in Europe (e.g., Verhulst et al., 2017) and in China (e.g., Shi et al., 2014).…”

Section: Ionospheric Soundingmentioning

confidence: 99%

The Potential for a Networked Ionospheric Sounding Constellation

Chartier

2022

Space Weather

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A novel networked sounding constellation mission concept is proposed. Radio sounding is the original sensing method that proved the existence of the ionosphere. Satellite‐borne sounders provided the first global observations of the terrestrial ionosphere and plasmasphere, as well as the Martian ionosphere. Networked sounding, where signals are transmitted and received across multiple instruments, has been used on the ground since the first days of ionospheric observation. This paper proposes networked sounding from space, to produce measurements of the F‐layer peak, enhanced E‐layers, regions of turbulent structuring, the topside scale height (or transition height) and potentially the plasmapause. The principal advantage of sounding over other methods is direct measurement of the peak density, where a networked implementation greatly increases spatial data coverage because it provides multiple unique signal paths through the ionosphere at different frequencies. Major advances in satellite software‐defined radio, deployable antennas, signal processing and data analysis have been made in recent years, such that a networked sounding constellation could be built at realistic cost—either as a hosted payload on commercial buses or on dedicated CubeSats.

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Section: Ionospheric Soundingmentioning

confidence: 99%

The Potential for a Networked Ionospheric Sounding Constellation

Chartier

2022

Space Weather

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“…An example of a DORS ionogram, color‐scaled according to the bearing offset from great circle geometry, is shown in Figure . A 19‐element twin‐arm array, with a DORS receiver per element, was used in this case (Heitmann et al, ). A passive spectrum monitoring tool, which can run alongside sounder operations on one of the independent down‐converter channels. It features a waterfall display, showing the time history of spectra, to better identify other HF users and assess channel occupancy.…”

Section: Software Overviewmentioning

confidence: 99%

“…An example of a DORS ionogram, color-scaled according to the bearing offset from great circle geometry, is shown in Figure 9. A 19-element twin-arm array, with a DORS receiver per element, was used in this case (Heitmann et al, 2018). 3.…”

Section: 1029/2018rs006681mentioning

confidence: 99%

“…The hardware and antennas are also relatively portable, making DORS/DOTS well suited to short-term experimental campaigns. Recent DST Group projects to use DORS/DOTS and its onboard processing capabilities have included the deployment of ionosonde networks to study ionospheric spatial variability (Gardiner-Garden et al, 2011), oblique angle-of-arrival reception (Heitmann et al, 2018), mode-selective radar trials (Abramovich et al, 2013), and HF geolocation experiments (Fabrizio & Heitmann, 2013).…”

Section: Applications and Further Examplesmentioning

confidence: 99%

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The DST Group High‐Fidelity, Multichannel Oblique Incidence Ionosonde

et al. 2019

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Defence Science and Technology Group has developed a complete oblique incidence ionosonde system to enhance ionospheric monitoring capabilities in support of the Jindalee Operational Radar Network. The Digital Oblique Receiving System, and its counterpart, the Digital Oblique Transmitting System, feature a direct‐digital, multichannel chirp‐sounder design that allows flexible collection of high‐resolution ionograms across many simultaneous paths, without compromising dynamic range. This paper outlines the hardware and software components of the Digital Oblique Receiving System/Digital Oblique Transmitting System, including the onboard signal processing that removes radio frequency interference and fits a parameterized electron density profile to the ionogram. Additional control and data management tools that have enabled the system to be effectively transitioned into routine operations are also described. The typical performance is illustrated through a selection of sample ionograms, highlighting the applications of Digital Oblique Receiving System/Digital Oblique Transmitting System to a wide variety of ionospheric studies, including those requiring Doppler and angle‐of‐arrival observations.

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“…The oblique‐incidence ionospheric radio sounder capabilities for addressing the problems of ionospheric physics, radio wave propagation, and dynamic processes operating in the ionosphere are greater (Galushko et al, ; Galushko et al, ; Heitmann et al, ; Ivanov et al, ; Laštovička & Chum, ; Mlynarczyk et al, ; Paznukhov et al, ; Pietrella et al, ; Shi et al, ; Shi et al, ; Shi et al, ; Vertogradov et al, ). In this case, both high‐frequency (HF) radars and passive HF radar systems consisting of a multichannel receiver and the transmitters for radio broadcasting can be used.…”

Section: Introductionmentioning

confidence: 99%

Radio Monitoring of Dynamic Processes in the Ionosphere Over China During the Partial Solar Eclipse of 11 August 2018

et al. 2020

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We briefly describe the multifrequency multiple‐path radio system and illustrate its observational capabilities by performing, as an example, the study of dynamic processes that occurred in the ionosphere over China during the partial solar eclipse on August 11 2018. This system, based on the software‐defined radio technology and capable of operating in the 10‐kHz to 30‐MHz band, has been developed jointly by Harbin Engineering University, the People's Republic of China, where it is located, and V. N. Karazin National University, Ukraine. The principle of the system operation is based on measurements of a Doppler shift of frequency. The implementation of Marple's algorithm for autoregression spectrum analysis has permitted an increase in a Doppler resolution down to 0.02 Hz and in a temporal resolution down to 7.5 s. The number of radio propagation paths and their orientation depend on the specifics of problems being solved. The interpretation of the eclipse effects is complicated by processes launched by the dusk terminator. The eclipse was associated with an increase in the number of rays, the generation of oscillation processes in the atmospheric gravity wave range of periods, and with a negative Doppler shift of frequency at first and a positive shift of smaller magnitude subsequently. The solar eclipse launched ~9–14% amplitude quasiperiodic oscillations in the electron density, while a maximum decrease of order 26% was observed over the Hailar–Harbin path in the ionospheric E region. The latter value does not virtually differ from theoretical estimates.

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Observations and Modeling of Traveling Ionospheric Disturbance Signatures From an Australian Network of Oblique Angle‐of‐Arrival Sounders

Cited by 16 publications

References 57 publications

The Potential for a Networked Ionospheric Sounding Constellation

The Potential for a Networked Ionospheric Sounding Constellation

The DST Group High‐Fidelity, Multichannel Oblique Incidence Ionosonde

Radio Monitoring of Dynamic Processes in the Ionosphere Over China During the Partial Solar Eclipse of 11 August 2018

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