Polarimetry of auroral kilometric radiation with a triaxial nonorthogonal antenna system

Panchenko, M.

doi:10.1029/2004rs003039

Cited by 11 publications

(17 citation statements)

References 18 publications

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“…Results concerning AKR beaming presented in this paper are based on single-satellite AKR observations (POLRAD experiment on board the Auroral Probe in the frame of Interball project). With our swept frequency analyzer we are not able to work with individual AKR bursts generated in small elementary sources, but it is still possible to determine the direction to the AKR source region and confirm in this paper AKR beaming found by Mutel et al [2008] using ⃗ k vector source location scheme [Panchenko, 2003].…”

Section: Introductionsupporting

confidence: 56%

“…POLRAD's direction finding capacity is based on the instantaneous AKR power densities measurements on all three antennas [Panchenko, 2003], assuming that AKR is circularly polarized and originates from a point source. Recent measurements by Panchenko et al [2008] and Lamy et al [2010] found no conclusive presence of linearly polarized AKR component.…”

Section: Akr Sources Direction Finding-methodsmentioning

confidence: 99%

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Beaming of intense AKR seen from the Interball‐2 spacecraft

et al. 2017

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We present results of intense auroral kilometric radiation (AKR) sources direction finding based on single‐spacecraft truek→ vector source location performed in the frame of Interball‐2 mission (POLRAD experiment on board Auroral Probe). With our swept frequency analyzer we are not able to work with single AKR bursts generated in small, elementary sources, but we improve our signal‐to‐noise (s/n) ratio and determine direction to the AKR source region averaging data over 10 consecutive 4 kHz frequency steps. Measurements of directions to the AKR sources confirm recent Mutel et al. () findings based on Cluster Very Long Baseline Interferometry (VLBI) data—AKR rays are mostly confined to the direction tangent to the auroral oval as measured in Mutel's tangent plane (TP) coordinates. In this paper we use additional coordinate system rotated with respect to TP coordinates in order to determine azimuths of AKR rays with respect to the auroral oval. We see cases of AKR propagation significantly deflected from the tangent plane. Additional information concerning geometry of auroral arc at the AKR source can help to distinguish between propagation along and propagation across the auroral cavity. Examples of instantaneous AKR visibility maps defined in this paper for both coordinate systems are shown and discussed. Using such map (valid for our spacecraft for relatively short observational periods of the order of 10 min), it is possible for known positions of the AKR sources in invariant latitude‐magnetic local time coordinates to visualize direction angles of AKR beams reaching the observer.

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Section: Introductionsupporting

confidence: 56%

Section: Akr Sources Direction Finding-methodsmentioning

confidence: 99%

Beaming of intense AKR seen from the Interball‐2 spacecraft

et al. 2017

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“…The full set of GP measurement is thus recorded. GP inversions have been built and used on these data to characterize the AKR (Hanasz et al 2003;Panchenko 2004). …”

Section: Spin Demodulation Goniopolarimetrymentioning

confidence: 99%

STEREO/Waves Goniopolarimetry

et al. 2007

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The STEREO/Waves experiment is dedicated to the study of inner heliosphere radio emissions. This experiment is composed of a set of two identical receivers placed on each of the two STEREO spacecraft. The STEREO/Waves receivers have instantaneous Goniopolarimetric (GP) capabilities (also referred to as direction-finding capabilities). This means that it is possible to retrieve the direction of arrival of an incoming electromagnetic radio wave, its flux and its polarization. We review the state of the art of GP-capable radio receivers and available GP techniques. We then present the GP capabilities of the STEREO/Waves experiment. We finally show some GP results on solar Type III radio bursts, using data recorded with the Cassini/RPWS/HFR, which are very similar to the STEREO/Waves data.

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“…The methodology of this calibration is well described in Vogl et al []. The method has successfully been applied to derive the antenna properties of radio experiments on board, e.g., ISEE‐3 [ Fainberg et al , ], Voyager [ Lecacheux and Ortega‐Molina , ; Wang and Carr , ], Interball‐2/Polrad [ Panchenko , ], or Cassini [ Vogl et al , ; Cecconi and Zarka , ].…”

Section: Introductionmentioning

confidence: 99%

In‐flight calibration of STEREO‐B/WAVES antenna system

et al. 2014

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The STEREO/WAVES (SWAVES) experiment on board the two STEREO spacecraft (Solar Terrestrial Relations Observatory) launched on 25 October 2006 is dedicated to the measurement of the radio spectrum at frequencies between a few kilohertz and 16 MHz. The SWAVES antenna system consists of 6 m long orthogonal monopoles designed to measure the electric component of the radio waves. With this configuration direction finding of radio sources and polarimetry (analysis of the polarization state) of incident radio waves is possible. For the evaluation of the SWAVES data the receiving properties of the antennas, distorted by the radiation coupling with the spacecraft body and other onboard devices, have to be known accurately. In the present context, these properties are described by the antenna effective length vectors. We present the results of an in-flight calibration of the SWAVES antennas using the observations of the nonthermal terrestrial auroral kilometric radiation (AKR) during STEREO roll maneuvers in an early stage of the mission. A least squares method combined with a genetic algorithm was applied to find the effective length vectors of the STEREO Behind (STEREO-B)/WAVES antennas in a quasi-static frequency range ($L_{antenna} \ll \lambda_{wave}$) which fit best to the model and observed AKR intensity profiles. The obtained results confirm the former SWAVES antenna analysis by rheometry and numerical simulations. A final set of antenna parameters is recommended as a basis for evaluations of the SWAVES data

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Polarimetry of auroral kilometric radiation with a triaxial nonorthogonal antenna system

Cited by 11 publications

References 18 publications

Beaming of intense AKR seen from the Interball‐2 spacecraft

Beaming of intense AKR seen from the Interball‐2 spacecraft

STEREO/Waves Goniopolarimetry

In‐flight calibration of STEREO‐B/WAVES antenna system

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