Newcastle University

Research Interests

▪ Ionosphere effects on Earth-satellite propagation paths, satellite navigation and staelite-borne SARs including effects due to high latitude patches, time-varying irregularities and equatorial plasma bubbles .
▪ UHF transionospheric channel simulation for GNSS signals
▪Improved ionospheric correction for dual frequency and differential GPS.
▪Modelling and mitigation of scintillation effects on GPS positioning
▪Ionospheric HF propagation, scattering and HF channel modelling and simulation, HF MIMO

Other Expertise

▪ Radio direction-finding at VLF, HF and UHF including super-resolution methods and SSL.
▪ New and modified super-resolution direction-finding algorithms optimised for the resolution of multipath (coherent) sources, non-Gaussian noise, limited sample sets and real time/parallel processing and joint space-time (Frequency and DOA) estimation.

Esteem Indicators

▪ Member EPSRC Peer Review College (2006-2009; 2010-2013)
President, UK URSI and Chairman UK Committee for Radio Science
(URSI is the International Union for Radio Science) Jan 2003- Dec 2008.
▪ UK representative, Management Committee of COST Action 296, “Mitigation of Ionospheric Effects on Radio Systems"
▪ Joint leader, COST 296 Working Package on "Near-Earth Space Plasma Modelling and Forecasting: 2005-2009
▪ Member, Royal Society Scientific Unions Committee: 2003-2008
▪International Advisor, WARAS (Wireless and Radio Science Centre), Malaysia: 2004 -
▪ Fellow, Royal Astronomical Society

Funding

“GNSS scintillation: detection, forecasting and mitigation”, EPSRC linked grants with Prof. C.N. Mitchell (Bath University) and Dr. M. Aquino and Prof. A. Dodson (Nottingham University)& 4 industrial partners. Total fEC £1.6M (Newcastle fEC £470k) 1 April 2010 - 31 March 2014

Industrial Relevance

Partners on current EPSRC grant: Spirent, Septentrio,Chronos and Fugro

• Tiwari S, Tiwari R, Strangeways HJ. Characterization of ionospheric scintillation at high latitude in the European region. In: XXX URSI, General Assembly and Scientific Sympossium of International Union of Radio Science. 2011, Istanabul, Turkey.
• Strangeways HJ, Tiwari R. Mapping of ionospheric irregularity and scintillation spectral indices for Northern Europe. In: XXX URSI, General Assembly and Scientific Sympossium of International Union of Radio Science. 2011, Istanabul, Turkey.
• Tiwari R, Skone S, Tiwari S, Strangeways HJ. WBMod assisted PLL GPS software receiver for mitigating scintillation affect in high latitude region. In: XXX URSI, General Assembly and Scientific Sympossium of International Union of Radio Science. 2011, Istanabul, Turkey.
• Gherm VE, Zernov NN, Strangeways HJ. Effects of diffraction by ionospheric electron density irregularities on the range error in GNSS dual-frequency positioning and phase de-correlation. Radio Science 2011, 46, RS3002.
• Strangeways HJ. Determining scintillation effects on GPS receivers. Radio Science 2009, 44, 11.
• Zernov NN, Gherm VE, Strangeways HJ. On the effects of scintillation of low‐latitude bubbles on transionospheric paths of propagation. Radio Science 2009, 44, RS0A14.
• Abdullah M, Strangeways HJ, Walsh DMA. Improving ambiguity resolution rate with an accurate ionospheric differential correction. The Journal of Navigation 2009, 62(1), 151-166.
• Radicella SM, Sauli P, Jakowski N, Kouba D, Portillo A, Herraiz M, Strangeways HJ, Zernov NN, Gherm VE. Space Plasma Effects. Annals of Geophysics 2009, 52(3-4), 359-372.
• Abdullah M, Strangeways HJ, Zulkifli SSN. Ionospheric differential error determination using ray tracing for a short baseline. Advances in Space Research 2010,46 10 1326-1333.
• Strangeways HJ, Kutiev I, Cander LR, Kouris S, Gherm VE, Marin D, De La Morena B, Pryse SE, Perrone L, Pietrella M, Stankov S, Tomasik L, Tulunay E, Tulunay Y, Zernov NN, Zolesi B. Near-Earth space plasma modelling and forecasting. Annales of Geophysics 2009, 52(3-4), 255-271.
• Warnant R, Foelsche U, Aquino M, Bidaine B, Gherm VE, Hoque MM, Kutiev I, Lejeune S, Luntama JP, Spits J, Strangeways HJ, Wautelet G, Zernov NN, Jakowski N. Mitigation of ionospheric effects on GNSS. Annals of Geophysics 2009, 52(3-4), 373-390.
• Yu H, Aguado E, Brodin G, Cooper JA, Walsh DMA, Strangeways HJ. UWB Positioning System Design: Selection of Modulation and Multiple Access Schemes. The Journal of Navigation 2008, 61(1), 45-62.
• Gunashekar SD, Warrington EM, Strangeways HJ, Erhel Y, Salous S, Feeney SM, Abbasi NM, Bertel L, Lemur D, Marie F, Oger M. Utilization of antenna arrays in HF systems. Annals of Geophysics 2009, 52(3-4), 323-338.
• Maurits SA, Gherm VE, Zernov NN, Strangeways HJ. Modeling of scintillation effects on high‐latitude transionospheric paths using ionospheric model (UAF EPPIM) for background electron density specifications. Radio Science 2008, 43, RS4001.
• Zernov NN, Gherm VE, Strangeways HJ. Further determinations of strong scintillation effects on GNSS signals using the Hybrid Scintillation Propagation Model. Radio Science 2012, 47, RS0L06.
• Tiwari R, Strangeways HJ, Tiwari S, Boussakta S, Skone S. GPS L1 phase scintillation using wavelet analysis at high latitude. In: 7th IEEE International Workshop on Systems, Signal Processing and their Applications (WOSSPA). 2011, Tipaza, Algeria: IEEE.
• Tiwari R, Strangeways HJ, Tiwari S, Gherm VE, Zernov N, Skone S. Validation of a Transionospheric Propagation Scintillation Simulator for Strongly Scintillated GPS Signals Using Extensive High Latitude Data Sets. In: 24th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS 2011). 2011, Portland, Oregon, USA.