Newcastle University

Qualifications

MSc,PhD

Previous Positions

- Graduate Research Assistant (2008-August, 2010), University of  Calgary, Canada.
- Scientist in XXVI Indian Antarctic Expedition (November 2006-  April 2007)
- Junior Research Fellow (2006-07), Barkatullah University, Project  from National Centre for Antarctic    and  Ocean Research Goa, MoE  India.
- Junior Research Fellow (2005), Barkatullah University, Indo-Russian Project, DST Govt. of India.

Honours and Awards

Search and Research Youth Award (2012), MP Bhopal, India,

Young Scientist Award (2011),  International Union of Radio Science (URSI),

Teaching Effectiveness Award (2010), University of Calgary, Canada,

Best Paper presentation Award (2008), Institute of Navigation, GNSS 2008, Savannah, USA,

GRS Scholarship (2007-2010), University of Calgary, Canada,

Junior Research Fellow (2006 - 2007), National Centre for Antarctic and Ocean Research, India,

Scientist (Nov 2006 – April 2007), XXVI Indian Scientific Expedition to Antarctica,

Young Scientist Award (2005), MP Science Congress 2005, Bhopal, India.

Research Interests

- Improving space weather effect on GNSS services.
- GPS software receiver.
- Signal processing
- Ionospheric modelling and improving GPS solution during
scintillation.
- Ionospheric study at high latitude.

Current Work

- Ionospheric modelling and mitigating scintillation effect on GPS
solution.
- Adaptive GPS software receiver.

Esteem Indicators

- Scientist, XXVI Indian Antarctic Expedition.
- Regular member of ION (Institute of Navigation).
- Regular member of IEEE.

• 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.
• 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.
• Tiwari R, Ghafoori F, Fenek O-Al, Hadad O, Skone S. Investigation of high-latitude ionospheric scintillation observed over Canadian region. In: 23rd International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS).2010,Portland, Oregon, USA:The Institute of Navigation
• Tiwari R, Tiwari S, Purohit PK, Gwal AK. Navigation with global positioning system in Antarctic circle. In: Singh, J., Dutta, H.N, ed. Antarctica: The Most Interactive Ice-Air-Ocean Environment. USA: Nova Science Publishers, 2011, pp.233-248.
• Skone S, Feng F, Tiwari R, Coster A. Characterizing ionospheric irregularities for auroral scintillation. In: 22nd International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS).2009,Savannah, Georgia, USA:The Institute of Navigation
• Tiwari R, Bhattacharya S, Purohit PK, Gwal AK. Effect of TEC variation of GPS precise point at low latitude. The Open Atmospheric Science Journal 2009,3 1 1-12.
• Skone S, Feng M, Ghafoori F, Tiwari R. Investigation of scintillation characteristics for high latitude phenomena. In: 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS).2008,Savannah, Georgia, USA:The Institute of Navigation
• Bhattacharya S, Dubey S, Tiwari R, Purohit PK, Gwal AK. Effect of magnetic activity on ionospheric time delay at low latitude. Journal of Astrophysics and Astronomy 2008,29 1-2 269-274.
• Tiwari R, Purohit PK, Gwal AK. Study of GPS phase fluctuation at low latitude during high and low solar activity and their effect on GPS positioning. Journal of Geomatics 2008,2 2 71-79.
• Bhattacharya S, Purohit PK, Tiwari R, Gwal AK. Study of GPS based ionospheric scintillation and its effects on dual frequency receiver. Journal of Engineering, Science and Management Education 2010,1 55-61.
• Tiwari R, Tiwari S, Bhattacharya S, Purohit PK, Gwal AK. Ionospheric effect on GPS-based marine navigation. Journal of Engineering, Science and Management Education 2010, 2, 49-56.