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Title: Observations of Doppler and delay spreads on HF signals received over polar cap and trough paths at various stages of the solar cycle
Authors: Stocker, A. J.
Warrington, E. Michael
Siddle, D. R.
First Published: 24-Oct-2013
Publisher: American Geophysical Union (AGU)
Citation: Radio Science, 2013, 48 (5), pp. 638-645
Abstract: Information on delay and Doppler spreading is of importance to designers and operators of digital communication systems within the HF band since modem performance rapidly deteriorates when delay and Doppler spreads exceed system dependent thresholds. The northerly ionosphere is a particularly challenging region in this regard as delay and Doppler spreads often significantly exceed those for similar length paths at midlatitudes. This paper presents results from an extensive set of measurements undertaken over three northerly paths: two subauroral paths aligned along the midlatitude trough (Uppsala to Bruntingthorpe and Nurmijärvi to Bruntingthorpe) and one path (Qaanaaq to Ny-Ålesund) contained entirely within the polar cap. Measurements span the period from the 2009 solar minimum to July 2012, close to solar maximum and 2001, close to the previous solar maximum.
DOI Link: 10.1002/2013RS005264
ISSN: 0048-6604
eISSN: 1944-799X
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2013 The Authors. Radio Science published by Wiley on behalf of the American Geophysical Union. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Appears in Collections:Published Articles, Dept. of Engineering

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