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Modelling the electromagnetic phenomena associated with atmospheric storms and simulation of the IME-HF Analyser onboard the TARANIS satellite
2009 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The aim of this work is to study the transient electrical high frequency phenomena related to the thunderstorms. The mathematical model describing the trans-ionospheric pulse pairs (TIPPs) as a representant of these phenomena has been successfully developed. This knowledge is applied as a stimulus to the IME-HF (Instrument Mesure Electrique – voie Haute Fréquence) module of the TARANIS (Tool for the Analysis of RAdiation from lightNIng and Sprites) satellite. The TARANIS is a CNES (Centre National d'Études Spatiales) mission targeted to observe the magnetosphere- ionosphere-atmosphere coupling and the thunderstorm related phenomena from Earth’s orbit. The IME-HF is an onboard module specialized for measurement of the electrical part of the electromagnetic spectra in the bandwidth from 100 kHz to 35 MHz. Both hardware and function of the IME-HF are described, along with the hardware implementation of the detection algorithm for the transient events like TIPPs. The VHDL (Very-high-speed integrated circuit Hardware Description Language) is used as a tool for the hardware implementation into the FPGA (Field-Programmable Gate Array) device. The primitive sine waves and then the mathematically modeled TIPPs are used to stimulate the IME-HF hardware and evaluate the developed algorithm. Signals with and without the added artificial noise are used for stimulation. Only the noisiest signals are detected with an extended delay, otherwise the detection algorithm is working with the optimal performance. The results show, that the IME-HF with the implemented detection algorithm can sucessfully detect TIPPs with minimum initial pulse voltage 55 mV (the white noise level present is 10 mV) in 22 out of 25 cases. The future work that is discussed in the final chapter, will constist of implementation of the additional operational modes, telemetry and telecommand to the IME-HF.

Place, publisher, year, edition, pages
Keyword [en]
Technology, TARANIS, transient events, ionospheric dispersion, trans-ionospheric pulse pairs, TIPPs, IME-HF, VHDL, FPGA, mathematical modelling, hardware stimulation
Keyword [sv]
URN: urn:nbn:se:ltu:diva-51885ISRN: LTU-PB-EX--09/102--SELocal ID: 90f3e3c9-1ae5-4f50-846c-41805253bfb7OAI: diva2:1025249
Subject / course
Student thesis, at least 30 credits
Educational program
Space Engineering, master's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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