Interferometric and high time-resolution observations of naturally enhanced ion-acoustic echoes at the EISCAT Svalbard radar: Software radar and incoherent scattering

We know that the visible Aurora Borealis is structured on many different scales, down to a few tens of metres. By using the EISCAT radars on Svalbard as an interferometer, we have found structures in the radio echoes from the auroral ionosphere on a scale approaching that of the visible aurora, and...

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Bibliographic Details
Main Author: Grydeland, Tom
Format: Doctoral or Postdoctoral Thesis
Language:English
Published: Universitetet i Tromsø 2003
Subjects:
VDP::Matematikk og Naturvitenskap: 400::Informasjons- og kommunikasjonsvitenskap: 420::Simulering
visualisering
signalbehandling
bildeanalyse: 429
VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Elektronikk: 435
VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437
Svalbard
EISCAT
Online Access:https://hdl.handle.net/10037/282
Description
Summary:We know that the visible Aurora Borealis is structured on many different scales, down to a few tens of metres. By using the EISCAT radars on Svalbard as an interferometer, we have found structures in the radio echoes from the auroral ionosphere on a scale approaching that of the visible aurora, and simultaneously with it, but at far greater ranges. In this thesis we discuss how these radar observations were made, what they imply for theoretical explanations, as well as a new framework for the design and implementation of software-defined radar and other radio science instrumentation, in particular the signal processing which made these observations possible.

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