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Optimisation Of Ionospheric Scintillation Model Used In Radio Occultation
Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis is executed in cooperation with RUAG Space AB, which specializes in highly reliable on-board satellite equipment. The thesis focuses on the effect, which disturbs the amplitude and phase of a Global Positioning System (GPS) signal, called scintillation effect. It has a substantial impact on a GPS signal, during Radio Occultation (RO). RO is a method of analysis of a refracted signal which passes through the atmosphere. RO can be used for measuring climate change and for weather forecasting. By retrieving the bending angle of a GPS signal, three basic parameters of the Earth’s atmosphere can be obtained at different heights: temperature, pressure and humidity. As the scintillation effect causes prominent errors in the bending angle calculations, it is crucial to provide possibly the most precise mathematical model, which allows to conceive proper ionospheric corrections. In this thesis, the model using Rytov approach is implemented and optimised with different optimisation functions. It is shown that the scintillation model can be optimized, which may contribute to a more accurate retrieval of the atmospheric profiles.

Place, publisher, year, edition, pages
2016. , 64 p.
Keyword [en]
Global Positioning System, ionospheric scintillation, optimization, Radio Occultation
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-11915OAI: oai:DiVA.org:bth-11915DiVA: diva2:937398
External cooperation
RUAG Space Sweden
Subject / course
ET2566 Master's Thesis (120 credits) in Electrical Engineering with emphasis on Signal processing
Educational program
ETASX Master of Science Programme in Electrical Engineering with emphasis on Signal Processing
Presentation
2016-04-06, 11:28 (English)
Supervisors
Examiners
Available from: 2016-06-16 Created: 2016-05-27 Last updated: 2016-06-16Bibliographically approved

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CiteExportLink to record
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