Find Research Outputs

Search results

• A 12 year comparison of MIDAS and IRI 2007 ionospheric Total Electron Content

  Chartier, A. T., Mitchell, C. N. & Jackson, D. R., 1 May 2012, In: Advances in Space Research. 49, 9, p. 1348-1355 8 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

  • Ionosphere
  • total electron content
  • ionospherics
  • ionospheres
  • Electrons
  17 Citations (Scopus)

  148 Downloads (Pure)

• A comparison of the relative effect of the Earth’s Quasi-D.C. and A.C. electric field on Gradient Drift Waves in large-scale plasma structures in the polar regions

  Astin, I., Mitchell, C. & Burston, R., 20 Aug 2016, In: Journal of Geophysical Research: Space Physics.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

  • polar regions
  • alternating current
  • direct current
  • gradients
  • electric fields
  119 Downloads (Pure)

• Algorithms for the mitigation of space weather threats at low latitudes, contributing to the extension of EGNOS over Africa

  Forte, B., Da Dalt, F., Panicciari, T., Pinto Jayawardena, T., Mitchell, C., Zin, A., Marradi, L., Muscinelli, R., Fiordiponti, R., Sreeja, V., Aquino, M., Dovis, F., Alfonsi, L., Cesaroni, C., Spogli, L., De Franceschi, G., Haggstrom, I., Enell, C. F., Chawdhry, P. K., Hoeg, P. & 6 others, von Benzon, H-H., Pozoga, M., Kos, T., Vukovic, J., Henley, E. & Jackson, D., 27 Jun 2016, International Beacon Satellite Symposium BSS-2016.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

• A motion-compensated cone-beam CT using electrical impedance tomography imaging

  Pengpan, T., Smith, N. D., Qiu, W., Yao, A., Mitchell, C. N. & Soleimani, M., Jan 2011, In: Physiological Measurement. 32, 1, p. 19-34

  Research output: Contribution to journal › Article › peer-review

  • Electric Impedance
  • Tomography
  • Cones
  • Cone-Beam Computed Tomography
  • Imaging techniques
  7 Citations (Scopus)

• A multiresolution inversion for imaging the ionosphere

  Yin, P., Zheng, Y. N., Mitchell, C. N. & Li, B., 7 Jun 2017, In: Journal of Geophysical Research: Space Physics. 122, 6, p. 6799-6811 13 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • Ionosphere
  • ionospheres
  • ionosphere
  • ionospherics
  • image analysis
  7 Citations (Scopus)

• Analysis of diurnal double maxima observed above Italy during 1975–1991

  Katamzi, Z. T., Smith, N. D., Mitchell, C. N. & Spalla, P., 1 Nov 2012, In: Journal of Atmospheric and Solar-Terrestrial Physics. 89, p. 67-75

  Research output: Contribution to journal › Article › peer-review

  • Italy
  • total electron content
  • F region
  • geomagnetic storm
  • summer
  1 Citation (Scopus)

• A realistic simulation framework to evaluate ionospheric tomography

  Bruno, J., Mitchell, C. N., Bolmgren, K. H. A. & Witvliet, B. A., 1 Feb 2020, In: Advances in Space Research. 65, 3, p. 891-901 11 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

  • Carrier concentration
  • ionospherics
  • electron density
  • Ionosphere
  • Tomography
  3 Citations (Scopus)

  24 Downloads (Pure)

• A study of L-band scintillations and total electron content at an equatorial station, Lagos, Nigeria

  Adewale, A. O., Oyeyemi, E. O., Adeloye, A. B., Mitchell, C. N., Rose, J. A. R. & Cilliers, P. J., 7 Apr 2012, In: Radio Science. 47, RS2011, RS004846.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

  • Nigeria
  • Scintillation
  • total electron content
  • ultrahigh frequencies
  • Electrons
  18 Citations (Scopus)

  184 Downloads (Pure)

• Bipolar climatology of GPS ionospheric scintillation at solar minimum

  Alfonsi, L., Spogli, L., De Franceschi, G., Romano, V., Aquino, M., Dodson, A. & Mitchell, C. N., 2011, In: Radio Science. 46, Rs0d05.

  Research output: Contribution to journal › Article › peer-review

  • climatology
  • Climatology
  • Scintillation
  • ionospherics
  • scintillation
  85 Citations (Scopus)

• Challenges and solutions of estimating low - latitude ionisation gradients in the case of EGNOS

  Da Dalt, F., Panicciari, T., Mitchell, C., Forte, B., Wilhelm, N., Serant, D., Zin, A. & Marradi, L., 17 Feb 2016.

  Research output: Contribution to conference › Paper

• Dementia Diagnosis with Brain Scan Technology at University of Bath

  Mitchell, C. & Smith, N., 2012

  Research output: Non-textual form › Digital or Visual Products

  • Brain
  • Single photon emission computed tomography
  • Nuclear medicine
  • Electronics engineering
  • Electrical engineering

• Demonstration of the use of the Doppler Orbitography and Radio positioning Integrated by Satellite (DORIS) measurements to validate GPS ionospheric imaging

  Yin, P. & Mitchell, C. N., 3 Aug 2011, In: Advances in Space Research. 48, 3, p. 500-506 7 p.

  Research output: Contribution to journal › Article › peer-review

  • ionospherics
  • positioning
  • radio
  • Global positioning system
  • Demonstrations
  4 Citations (Scopus)

• Development of Low-Cost Spaceborne Multi-Frequency GNSS Receiver for Navigation and GNSS Remote Sensing

  Unwin, M., Gao, S., de Vos van Steenwijk, R., Jales, P., Maqsood, M., Gommenginger, C., Rose, J., Mitchell, C. & Partington, K., 2012, In: International Journal of Space Science and Engineering.

  Research output: Contribution to journal › Article › peer-review

• Experimentally Recorded Amplitude and Phase Scintillation through a Spirent Simulator

  Pinto Jayawardena, T., Mohd Ali, A., Forte, B., Kinrade, J., Mitchell, C., Smith, S. & Walter, T., 2014, The Insitute of Navigation, ION GNSS+ 2014.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  2 Citations (Scopus)

• Further observations of GPS satellite oscillator anomalies mimicking ionospheric phase scintillation

  Benton, C. J. & Mitchell, C. N., Jul 2014, In: GPS Solutions. 18, 3, p. 387-391 5 p.

  Research output: Contribution to journal › Article › peer-review

  • GPS
  • anomaly
  • ruling
  • alarm
  • plasma
  9 Citations (Scopus)

• Global navigation satellite systems and the ionosphere

  Mitchell, C. N., 2012, 12th IET International Conference on Ionospheric Radio Systems and Techniques (IRST 2012). IET, p. 46 1 p. (IET Conference Publications; vol. 2012, no. CP594).

  Research output: Chapter in Book/Report/Conference proceeding › Other chapter contribution

  • Ionosphere
  • Ionospheric measurement
  • Satellites
  • Navigation

• GPS loss of lock statistics over Brazil during the 24th solar cycle

  Damaceno, J. G., Bolmgren, K., Bruno, J., De Franceschi, G., Mitchell, C. & Cafaro, M., 9 Apr 2020, In: Advances in Space Research.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • Brazil
  • solar cycles
  • solar cycle
  • Global positioning system
  • GPS

• GPS phase scintillation and auroral electrojet currents during geomagnetic storms of March 17, 2013 and 2015

  Prikryl, P., Ghoddousi-Fard, R., Viljanen, A., Weygand, J. M., Kunduri, B. S. R., Thomas, E. G., Ruohoniemi, J. M., Connors, M., Danskin, D. W., Jayachandran, P. T., Jacobsen, K. S., Andalsvik, Y. L., Durgonics, T., Oksavik, K., Zhang, Y., Spanswick, E., Sreeja, V., Aquino, M., Cilliers, P. J., Li, G. & 5 others, Ning, B., Mitchell, C. N., Spogli, L., Terkildsen, M. & Weatherwax, A. T., 10 Nov 2017, 32nd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), 2017. IEEE, p. 1-4 4 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • auroral electrojets
  • Scintillation
  • magnetic storms
  • polar regions
  • scintillation
  1 Citation (Scopus)

• GPS phase scintillation at high latitudes during geomagnetic storms of 7-17 March 2012 - Part 2: Interhemispheric comparison

  Prikryl, P., Ghoddousi-Fard, R., Spogli, L., Mitchell, C. N., Li, G., Ning, B., Cilliers, P. J., Sreeja, V., Aquino, M., Terkildsen, M., Jayachandran, P. T., Jiao, Y., Morton, Y. T., Ruohoniemi, J. M., Thomas, E. G., Zhang, Y., Weatherwax, A. T., Alfonsi, L., De Franceschi, G. & Romano, V., 2 Jun 2015, In: Annales Geophysicae. 33, 6, p. 657-670 14 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • magnetic storms
  • geomagnetic storm
  • polar regions
  • scintillation
  • ionospherics
  12 Citations (Scopus)

• GPS satellite oscillator faults mimicking ionospheric phase scintillation

  Benton, C. & Mitchell, C., Oct 2012, In: GPS Solutions. 16, 4, p. 477-482 6 p.

  Research output: Contribution to journal › Article › peer-review

  • GPS
  • effect
  8 Citations (Scopus)

• GPS scintillation and TEC gradients at equatorial latitudes in April 2006

  Alfonsi, L., Spogli, L., Tong, J. R., De Franceschi, G., Romano, V., Bourdillon, A., Huy, M. L. & Mitchell, C. N., 17 May 2011, In: Advances in Space Research. 47, 10, p. 1750-1757 8 p.

  Research output: Contribution to journal › Article › peer-review

  • Scintillation
  • total electron content
  • ionospherics
  • Electrons
  • scintillation
  31 Citations (Scopus)

• GPS tomography in the polar cap: comparison with ionosondes and in situ spacecraft data

  Pokhotelov, D., Jayachandran, P. T., Mitchell, C. N., MacDougall, J. W. & Denton, M. H., Jan 2011, In: GPS Solutions. 15, 1, p. 79-87 9 p.

  Research output: Contribution to journal › Article › peer-review

  • spacecraft
  • tomography
  • GPS
  • dimethylsulfoniopropionate
  • plasma
  12 Citations (Scopus)

• Identification of ionisation structures originating from auroral optical emissions through co-located GPS, riometers, and all-sky camera observations

  Forte, B., Gerrard, A. J., Weatherwax, A., Skone, S., Kinrade, J., Bust, G. S., Mitchell, C. & Ebihara, Y., 25 Aug 2016.

  Research output: Contribution to conference › Paper

• Identification of scintillation signatures on GPS signals originating from plasma structures detected with EISCAT incoherent scatter radar along the same line of sight

  Forte, B., Coleman, C., Skone, S., Häggström, I., Mitchell, C., Da Dalt, F., Panicciari, T., Kinrade, J. & Bust, G., 31 Jan 2017, In: Journal of Geophysical Research: Space Physics. 122, 1, p. 916-931 16 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • incoherent scatter radar
  • line of sight
  • scintillation
  • signatures
  • navigation
  15 Citations (Scopus)

• Imaging of 3-D plasmaspheric electron density using GPS to LEO satellite differential phase observations

  Spencer, P. S. J. & Mitchell, C. N., Jun 2011, In: Radio Science. 46, 3, 6 p., RS0D04.

  Research output: Contribution to journal › Article › peer-review

  File

  • plasmasphere
  • Carrier concentration
  • low Earth orbits
  • electron density
  • Orbits
  12 Citations (Scopus)

  140 Downloads (Pure)

• Imaging technology transfer – helping to diagnose dementia

  Mitchell, C. & Smith, N., 2012

  Research output: Non-textual form › Web publication/site

• Imaging the topside-ionosphere and plasmasphere with ionospheric tomography using COSMIC GPS TEC: plasmaspheric imaging with tomography

  Pinto Jayawardena, T. S., Chartier, A. T., Spencer, P. & Mitchell, C. N., Jan 2016, In: Journal of Geophysical Research: Space Physics. 121, 1, p. 817-831

  Research output: Contribution to journal › Article › peer-review

  Open Access
  9 Citations (Scopus)

• Impact of Ionospheric scintillation on the performance of a network of EGNOS - like monitoring stations

  Forte, B., Pinto Jayawardena, T., Panicciari, T., Da Dalt, F., Mitchell, C., Wilhelm, N., Serant, D., Alfonsi, L., Spogli, L., De Franceschi, G., Zin, A. & Marradi, L., 17 Feb 2016.

  Research output: Contribution to conference › Paper

• Implementation of a new ionospheric model (ANIMo) into a three-dimensional variational analysis (3D-Var) for imaging and forecasting purposes

  Da Dalt, F., Benton, C. J., Panicciari, T., Smith, N. D. & Mitchell, C. N., Aug 2014, p. 1-4.

  Research output: Contribution to conference › Other › peer-review

• Improving ionospheric imaging via the incorporation of direct ionosonde observations into GPS tomography

  Cooper, C., Chartier, A. T., Mitchell, C. & Jackson, D. R., 2014, 2014 31th URSI General Assembly and Scientific Symposium, URSI GASS 2014. IEEE, p. 1-3

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Ionosphere
  • Tomography
  • Global positioning system
  • Imaging techniques
  • Electrons
  1 Citation (Scopus)

• Improving the vertical electron density profile in ionospheric imaging at storm time: A case study on 25-27 September 2011

  Yin, P. & Mitchell, C. N., 8 Sep 2014, In: Journal of Geophysical Research: Space Physics. 119, 9, p. 7963-7971 9 p.

  Research output: Contribution to journal › Article › peer-review

  • COSMIC
  • electron density
  • radio
  • geomagnetic storm
  • extreme event
  4 Citations (Scopus)

• Ionospheric corrections for GPS time transfer

  Rose, J. A. R., Watson, R. J., Allain, D. J. & Mitchell, C. N., 20 Mar 2014, In: Radio Science. 49, 3, p. 196-206 11 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • Global Positioning System
  • ionospherics
  • Global positioning system
  • GPS
  • Tomography
  10 Citations (Scopus)

• Ionospheric data assimilation and forecasting during storms

  Chartier, A. T., Matsuo, T., Anderson, J. L., Collins, N., Hoar, T. J., Lu, G., Mitchell, C. N., Coster, A. J., Paxton, L. J. & Bust, G. S., 18 Feb 2016, In: Journal of Geophysical Research: Space Physics. 121, 1, p. 764-778 15 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

  • data assimilation
  • forecasting
  • total electron content
  • electrodynamics
  • thermosphere
  23 Citations (Scopus)

  220 Downloads (Pure)

• Ionospheric data assimilation applied to HF geolocation in the presence of traveling ionospheric disturbances

  Mitchell, C. N., Rankov, N. R., Bust, G. S., Miller, E., Gaussiran, T., Calfas, R., Doyle, J. D., Teig, L. J., Werth, J. L. & Dekine, I., 1 Jul 2017, In: Radio Science. 52, 7, p. 829-840 12 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • traveling ionospheric disturbances
  • assimilation
  • ionospherics
  • Ionospheric measurement
  • data assimilation
  5 Citations (Scopus)

• Ionospheric imaging in Africa

  Chartier, A. T., Kinrade, J., Mitchell, C. N., Rose, J. A. R., Jackson, D. R., Cilliers, P., Habarulema, J-B., Katamzi, Z., McKinnell, L-A., Matamba, T., Opperman, B., Ssessanga, N., Giday, N. M., Tyalimpi, V., De Franceschi, G., Romano, V., Scotto, C., Notarpietro, R., Dovis, F., Avenant, E. & 11 others, Wonnacott, R., Oyeyemi, E., Mahrous, A., Tsidu, G. M., Lekamisy, H., Olwendo, J. O., Sibanda, P., Gogie, T. K., Rabiu, B., De Jong, K. & Adewale, A., 8 Jan 2014, In: Radio Science. 49, 1, p. 19-27 9 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • Global Positioning System
  • ionospherics
  • Global positioning system
  • GPS
  • Imaging techniques
  8 Citations (Scopus)

  81 Downloads (Pure)

• Ionospheric impact on Biomass ESA mission

  Alfonsi, L., Povero, G., Spogli, L., Cesaroni, C., Mitchell, C., Burston, R., Vadakke, S. V., Aquino, M., Klaunser, V., Muella, M., Pezzopane, M., Giuntini, A., Forte, B., Hunstad, I., De Franceschi, G., Musicò, E., Pini, M., Vinh, L. T., Tung, T. H., Husin, A. & 6 others, Ekawati, S., de la Cruz-Cayapan, C. V., Abdullah, M., Mat Daud, N., Huy, M. L. & Floury, N., 30 Nov 2017.

  Research output: Contribution to conference › Paper

  • Ionosphere
  • Biomass
  • Monitoring

• Ionospheric scintillation over Antarctica during the storm of 5–6 April 2010

  Kinrade, J., Mitchell, C. N., Yin, P., Smith, N., Jarvis, M. J., Maxfield, D. J., Rose, M. C., Bust, G. S. & Weatherwax, A. T., May 2012, In: Journal of Geophysical Research. 117, A5, A05304.

  Research output: Contribution to journal › Article › peer-review

  File

  • Antarctic regions
  • Scintillation
  • Antarctica
  • ionospherics
  • scintillation
  37 Citations (Scopus)

  138 Downloads (Pure)

• Isolating the multipath component in GNSS signal-to-noise data and locating reflecting objects

  Benton, C. & Mitchell, C. N., 2011, In: Radio Science. 46, RS6002.

  Research output: Contribution to journal › Article › peer-review

  File

  • satellite navigation systems
  • Signal systems
  • GNSS
  • Satellites
  • Navigation
  24 Citations (Scopus)

  160 Downloads (Pure)

• Method to measure the Stokes parameters of GPS signals

  Benton, C. J. & Mitchell, C. N., 1 Jan 2014, In: Radio Science. 49, 1, p. 7-18 12 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • Global Positioning System
  • Global positioning system
  • GPS
  • receivers
  • Circular polarization
  1 Citation (Scopus)

  38 Downloads (Pure)

• New method for tracking the movement of ionospheric plasma

  Benton, C. & Mitchell, C., 2012, In: Journal of Geophysical Research. 117, 9, A09317.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

  • ionospherics
  • Plasmas
  • plasma generators
  • plasma
  • Earth ionosphere
  2 Citations (Scopus)

  150 Downloads (Pure)

• Nonlinear estimation to assimilate GPS TEC data into a regional ionosphere model

  Psiaki, M. L., Bust, G. S. & Mitchell, C. N., May 2016, 28th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2015: Volume 5. Institute of Navigation, p. 3497-3510 14 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Ionosphere
  • Electronic density of states
  • Global positioning system
  • Carrier concentration
  • Splines
  4 Citations (Scopus)

• Observation of auroral optical emissions through co-located GPS, riometers, and all-sky imager measurements

  Forte, B., Gerrard, A. J., Weatherwax, A., Skone, S., Bust, G. S., Kinrade, J., Ebihara, Y. & Mitchell, C., 27 Jun 2016, International Beacon Satellite Symposium BSS-2016.

  Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

• Optimizing geophysical muon radiography using information theory

  Benton, C. J., Mitchell, C. N., Coleman, M., Paling, S. M., Lincoln, D. L., Thompson, L., Clark, S. J. & Gluyas, J. G., 29 Feb 2020, In: Geophysical Journal International. 220, 2, p. 1078-1094 17 p.

  Research output: Contribution to journal › Article › peer-review

  • Radiography
  • radiography
  • information theory
  • Information theory
  • muons

• Polar-cap plasma patch primary linear instability growth-rates compared

  Burston, R., Mitchell, C. & Astin, I., Apr 2016, In: Journal of Geophysical Research: Space Physics. 121, 4, p. 3439-3451

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

  • polar caps
  • turbulence
  • Dynamics Explorer 2 satellite
  • gradients
  • scintillation
  8 Citations (Scopus)

  149 Downloads (Pure)

• Quality analysis of dual-frequency smartphone-based ionospheric TEC measurements: what can be achieved?

  Bruno, J., Darugna, F., Bolmgren, K., Wübbena, J., Mitchell, C. & Schmitz, M., 2020, In: Annals of Geophysics. 63, 0, p. 07 1 p., AC07.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  • total electron content
  • GNSS
  • antenna
  • analysis
  • atmospheric monitoring

• Rapid and Accurate Measurement of Polarization and Fading of Weak VHF Signals Obliquely Reflected from Sporadic-E Layers

  Deacon, C., Witvliet, B. A., Mitchell, C. & Steendam, S., 6 Nov 2020, (Acceptance date) In: IEEE Transactions on Antennas and Propagation. 16 p.

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File
  104 Downloads (Pure)

• Real - world ionospheric events in a Spirent Simulator

  Pinto Jayawardena, T., Buesnel, G., Boyles, R., Mitchell, C., Forte, B. & Watson, R., 9 May 2017.

  Research output: Contribution to conference › Paper

• Robust ionospheric tomography using sparse regularization

  Panicciari, T., Smith, N. D., Da Dalt, F. & Mitchell, C. N., Aug 2014, p. 1-4.

  Research output: Contribution to conference › Other › peer-review

• Satellite-beacon Ionospheric-scintillation Global Model of the upper Atmosphere (SIGMA) II: inverse modeling with high latitude observations to deduce irregularity physics

  Deshpande, K. D., Bust, G. S., Clauer, C. R., Scales, W. A., Frissell, N. A., Ruohoniemi, J. M., Spogli, L., Mitchell, C. & Weatherwax, A. T., 28 Sep 2016, In: Journal of Geophysical Research: Space Physics. 121, 9, p. 9188-9023

  Research output: Contribution to journal › Article › peer-review

  Open Access

  File

  • Scintillation
  • Upper atmosphere
  • Physics
  • Satellites
  • Navigation
  26 Citations (Scopus)

  309 Downloads (Pure)

• Sensing the earth with the SGR-ReSI multi-antenna space GPS/GNSS receiver

  Unwin, M., De Vos Van Steenwijk, R., Brenchley, M., Gommenginger, C., Mitchell, C. & Gao, S., 2011, In: Advances in the Astronautical Sciences. 141, p. 735-744 10 p.

  Research output: Contribution to journal › Article

  • remote sensing
  • GNSS
  • Remote sensing
  • antenna
  • antennas