Intercepted signals for ionospheric science

Lind, Frank D.; Erickson, P. J.; Coster, A. J.; Foster, J. C.; Marchese, Jim; Berkowitz, Z.M.P.; Sahr, John D.

doi:10.1002/rds.20034

Cited by 2 publications

(3 citation statements)

References 63 publications

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“…[4], [5]) and more recently using transmitters of opportunity (i.e. passive radar; [6], [7], [8]). Naturally and artificially enhanced ion acoustic lines have also been observed at a wide range of locations using existing Geospace radar systems ( [9], [10], [11], [12]).…”

Section: ) Geospacementioning

confidence: 99%

“…Meteor trails can be distinguished by their characteristic altitude, range and doppler structure, and typical time evolution over several seconds. Processing and analysis of these data followed the techniques described in prior work [6]. This trial was associated with the 2013 Quadrantid meteor shower and scatter was simultaneously detected on frequencies associated with two separate transmitters.…”

Section: A Skala Passive Radar Testingmentioning

confidence: 99%

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Radio array of portable interferometric detectors (RAPID)

Lind¹,

Lonsdale²,

Faulkner

et al. 2013

2013 IEEE International Symposium on Phased Array Systems and Technology

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The Radio Array of Portable Interferometric Detectors (RAPID) is a new radio array with a flexible architecture. The instrument uses per element software defined radios and a software signal processing architecture to enable the flexible study of a wide range of natural phenomena using radio imaging techniques. The array will be used for investigations of ionospheric phenomena, solar radio emission, the Galactic synchrotron background, and ultra-high energy cosmic rays via air-shower emission. The array will consist of ∼100 small, low gain antennas operating over a frequency range of 48 to 450 MHz. RAPID is designed to make flexible and coherent radio observations, capturing the amplitude and phase of the electric field across a user-defined aperture with easily reconfigurable spatial sampling. Key technical elements include a novel absolute broadband antenna calibration method, elimination of a clock distribution network with a compact, low power chip scale atomic clock in each unit, state-of-the-art high performance voltage data recording, and low power consumption, via use of the latest low-power A/D converters and digital processing chips. By minimizing the power per element the RAPID system will be able to use compact, portable solar panels and batteries. Unlike existing arrays, RAPID will be operated without any cabling between the antennas and a central location, and can be shipped, deployed and physically reconfigured quickly and easily with zero site infrastructure. This creates a unique capability to locate and configure an imaging radio interferometer array, highly customized to the specific science goal of any given field campaign, thereby supporting science investigations that have not before been feasible. When used in conjunction with existing incoherent scatter radar transmitters or other transmitters of opportunity the array will provide a flexible capability for radar imaging of coherent and enhanced backscatter (e.g. E and F-region irregularities ; naturally or artificially enhanced ion acoustic lines). The RAPID system architecture is based on voltage data capture with all processing performed in software, simplifying field operations and reducing equipment complexity. Data and work-flow management for the system will exploit distributed messaging, cloud technologies for scalable processing, and be implemented using open source Object Oriented Data Technology (OODT) software.

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Section: ) Geospacementioning

confidence: 99%

Section: A Skala Passive Radar Testingmentioning

confidence: 99%

Radio array of portable interferometric detectors (RAPID)

Lind¹,

Lonsdale²,

Faulkner

et al. 2013

2013 IEEE International Symposium on Phased Array Systems and Technology

View full text Add to dashboard Cite

show abstract

“…It has also been shown that a passive CW technique can be applied to ionospheric measurements using FM radio stations as the transmitter sources (Lind et al, 1999(Lind et al, , 2013Sahr & Lind, 1997). Using an external radio signal source as the transmitter is known as "passive radar" and has the benefit of only requiring a receiver to make ionospheric measurements.…”

Section: 1029/2018rs006747mentioning

confidence: 99%

ICEBEAR: An All‐Digital Bistatic Coded Continuous‐Wave Radar for Studies of the E Region of the Ionosphere

et al. 2019

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The Ionospheric Continuous-wave E region Bistatic Experimental Auroral Radar (ICEBEAR) is a coherent scatter ionospheric radar. It operates at a frequency of 49.5 MHz, which is ideal for observing E region coherent echoes. The radar is located in Saskatchewan, Canada, and is operated by the University of Saskatchewan. The ICEBEAR system uses a continuous-wave (CW) signal and requires isolation between the receiving and transmitting arrays. This was accomplished through a bistatic setup, where the receiver and transmitter are ≈240 km apart. Currently, the ICEBEAR system implements a pseudo random noise phase modulation on this CW signal to obtain 3-km range resolution and 5-s integration time images of E region ionospheric irregularities over a 600 km × 600 km field of view. The center of the field of view is located at ≈58 • N, 106 • W. The radar design allows for future improvements to temporal and/or spatial resolutions. Each site consists of a linear phased array with 10 equally spaced antennas. This, combined with modern digital radio hardware, provides azimuthal angle of arrival measurements at the receiving array and azimuthal transmission control at the transmitting array. This publication describes the radio hardware and signal processing used by the ICEBEAR radar and emphasizes the unique capabilities of the radar. First ICEBEAR observations from a Kp ≥ 4 event on 10 March 2018, are presented and shown to produce simultaneously the four types of previously characterized E region coherent scatter echoes.

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Intercepted signals for ionospheric science

Cited by 2 publications

References 63 publications

Radio array of portable interferometric detectors (RAPID)

Radio array of portable interferometric detectors (RAPID)

ICEBEAR: An All‐Digital Bistatic Coded Continuous‐Wave Radar for Studies of the E Region of the Ionosphere

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