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Positioning of geostationary satellite by radio interferometry
, Article IEEE Transactions on Aerospace and Electronic Systems ; Volume 55, Issue 2 , 2019 , Pages 903-917 ; 00189251 (ISSN) ; Behnia, F ; Haghshenas, H ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2019
Abstract
There are several perturbations that force the satellite orbit to deviate from the elliptical form. To cope with these perturbations, station keeping is applied. For accurate station keeping, determination of the true satellite orbit is necessary. Radio interferometry is one of the techniques used for determining azimuth and elevation look angles of a satellite. In this paper, we introduce three structures based on interferometry for determining the view angles of satellites. The estimated angles are combined with range measurement for orbital positioning of geostationary (GEO) satellites. In the proposed interferometry structures, to acquire the required angular accuracy, the distance...
Investigating the features of a pentagon array for studying Extensive Air Showers
, Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment ; Volume 962 , 2020 ; Rastegarzadeh, G ; Mortazavi Moghaddam, S ; Sharif University of Technology
Elsevier B.V
2020
Abstract
We used a method to evaluate angular accuracy for air showers direction recorded by a pentagon array of scintillation detectors. This is achieved by using the coincidences between the air showers recorded by the two sub-arrays. Also, using the CORSIKA code the angular precision of this array and the effect of inherent error on it is obtained at different energies of the primary particles and at different zenith angles. © 2020 Elsevier B.V
Positioning of geostationary satellite by Radio Interferometry
, Article IEEE Transactions on Aerospace and Electronic Systems ; 2018 ; 00189251 (ISSN) ; Behnia, F ; Haghshenas, H ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2018
Abstract
There are several perturbations that force the satellite orbit to deviate from the elliptical form. To cope with these perturbations, station keeping is applied. For accurate station keeping, determination of the true satellite orbit is necessary. Radio interferometry is one of the techniques used for determining azimuth and elevation look angles of a satellite. In this paper we introduce three structures based on interferometry for determining the view angles of satellites .The estimated angles are combined with range measurement for orbital positioning of geostationary (GEO) satellites. In the proposed interferometry structures, to acquire the required angular accuracy, the distance...