MAARSY multiple receiver phase calibration using radio sources

Chau, Jorge L.; Renkwitz, Toralf; Stober, Gunter; Latteck, R.

doi:10.1016/j.jastp.2013.04.004

Cited by 19 publications

(20 citation statements)

References 45 publications

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“…In atmospheric and ionospheric interferometric radars, particularly those operating in the high‐frequency and very high frequency bands (i.e., between 3 and 300 MHz) different procedures have been proposed. For example, the use of localized radio sources is a common practice in large array systems (e.g., Chau et al, , ; Palmer et al, ; Woodman, ). A complete list of procedures used in these radars can be found in Holdsworth, Tsutsumi, et al () and Chau et al ().…”

Section: Introductionmentioning

confidence: 99%

Empirical Phase Calibration for Multistatic Specular Meteor Radars Using a Beamforming Approach

Chau

Clahsen

2019

Radio Science

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Specular meteor radars have proven useful for observing mesosphere and lower thermosphere altitudes. More recently, their capabilities have been enhanced by including multistatic configurations. In both cases, monostatic and multistatic, the multiantenna interferometer used to determine the location of the measurements needs to be carefully calibrated in phase. In this work we proposed a technique to calibrate the receiving phases of such interferometers, including the standard five‐antenna Jones configuration located on a plane and arbitrary configurations not necessarily located on a plane and not limited to five antennas. Our technique uses beamforming and nonlinear least squares fitting to determine the angle of arrivals that are consistent with the complex spatial coherences of the detected meteors. The optimization process uses a priori information based on the expected angular and altitude distribution of the echoes. The technique is demonstrated using real bistatic data. The obtained distribution of inverse decay time as a function of altitude is shown to be a sensitive and independent quality control feature of the applied calibration.

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Section: Introductionmentioning

confidence: 99%

Empirical Phase Calibration for Multistatic Specular Meteor Radars Using a Beamforming Approach

Chau

Clahsen

2019

Radio Science

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“…First attempts to use normalized meteor head echo intensities for some events observed with MAARSY were compared to simulated radiation pattern cross sections as described in Chau et al (2014). Here, quite good agreement for the main beam and the first side lobe were found, both in shape and width.…”

Section: Meteor Head Echo Observations With Maarsymentioning

confidence: 94%

“…subgroups of an antenna array as described for MAARSY in Chau et al (2014). Knowledge of the individual antenna array subgroup phases is essential for integrating them into synthetic arrays, providing different beam shapes and widths as well as the interferometric analysis of the data, e.g.…”

Section: Introductionmentioning

confidence: 99%

VHF antenna pattern characterization by the observation of meteor head echoes

Renkwitz¹,

Schult²,

Latteck³

2017

Atmos. Meas. Tech.

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Abstract. The Middle Atmosphere Alomar Radar System (MAARSY) with its active phased array antenna is designed and used for studies of phenomena in the mesosphere and lower atmosphere. The flexible beam forming and steering combined with a large aperture array allows for observations with a high temporal and angular resolution. For both the analysis of the radar data and the configuration of experiments, the actual radiation pattern needs to be known. For that purpose, various simulations as well as passive and active experiments have been conducted. Here, results of meteor head echo observations are presented, which allow us to derive detailed information of the actual radiation pattern for different beam-pointing positions and the current health status of the entire radar. For MAARSY, the described method offers robust beam pointing and width estimations for a minimum of a few days of observations.

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“…High-power large-aperture (HPLA) radar systems with tens of arrayed antennas such as the monostatic Middle Atmosphere Alomar Radar System (MAARSY) in Norway or the Middle and Upper radar (MU radar) in Japan are normally constructed by high budget research institutes. These large scale systems use complex interferometric analysis over large number of receiving channels to detect the phase differences as, for example, the phase detection mechanism of the MAARSY system [Chau et al, 2014]. On the other hand, low budget educational institutes and amateur observer groups cannot afford to build systems at this level and they tend to build alternative basic systems such as the one described in this paper.…”

Section: Introductionmentioning

confidence: 99%

A low cost meteor observation system using radio forward scattering and the interferometry technique

et al. 2015

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We present a low cost meteor observation system based on the radio forward scattering and interferometry technique at Kochi University of Technology (KUT). The system can be a suitable model for low budget educational institutes that target practical learning of astronomical objects and upper atmospheric characteristics. The system methodology for the automatic counting of meteor echoes, filtering noise and detecting meteor echo directions is described. Detection of the meteor echo directions, which is the basic element for determining the meteor trajectories and the orbital parameters of parent comets, is based on a software system developed for analysis of phase differences detected by interferometry. Randomly selected observation samples measured by the radio interferometer are compared to simultaneous optical observations by video cameras to verify the system accuracy. Preliminary error analysis revealed that the system accuracy is directly related to the duration of observed meteor echoes. 80% of meteor echo samples with durations longer than 3 seconds showed agreement in azimuth and elevation angles measurements to within a 10 degree error range, while meteor echo samples with shorter durations showed lower agreement levels probably due to the low system sampling resolution of 0.1 seconds. The reasonable agreement level of meteor echoes with duration longer than 3 seconds demonstrated the applicability of the system methodology. Accurate observation of shorter duration meteor echoes could possibly be achieved by improving the system resolution.

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MAARSY multiple receiver phase calibration using radio sources

Cited by 19 publications

References 45 publications

Empirical Phase Calibration for Multistatic Specular Meteor Radars Using a Beamforming Approach

Empirical Phase Calibration for Multistatic Specular Meteor Radars Using a Beamforming Approach

VHF antenna pattern characterization by the observation of meteor head echoes

A low cost meteor observation system using radio forward scattering and the interferometry technique

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