Items by Spencer, Paul
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Spencer, P. S. J. and Mitchell, C. N., 2011. Imaging of 3-D plasmaspheric electron density using GPS to LEO satellite differential phase observations. Radio Science, 46 (3), RS0D04.
Qiu, W., Tong, J., Mitchell, C., Marchant, T., Spencer, P., Moore, C. J. and Soleimani, M., 2010. New iterative cone beam CT reconstruction software: parameter optimisation and convergence study. Computer Methods and Programs in Biomedicine, 100 (2), pp. 166-174.
Pokhotelov, D., Mitchell, C. N., Spencer, P. S. J., Hairston, M. R. and Heelis, R. A., 2008. Ionospheric storm time dynamics as seen by GPS tomography and in situ spacecraft observations. Journal of Geophysical Research, 113, A00A16.
De Franceschi, G., Alfonsi, L., Rornano, V., Aquino, M., Dodson, A., Mitchell, C. N., Spencer, P. and Wernik, A. W., 2008. Dynamics of high-latitude patches and associated small-scale irregularities during the October and November 2003 storms. Journal of Atmospheric and Solar-Terrestrial Physics, 70 (6), pp. 879-888.
Bust, G. S., Crowley, G., Garner, T. W., Gaussiran, T. L., Meggs, R. W., Mitchell, C. N., Spencer, P. S. J., Yin, P. and Zapfe, B., 2007. Four-dimensional GPS imaging of space weather storms. Space Weather: The International Journal of Research and Applications, 5 (2).
Spencer, P. S. J. and Mitchell, C. N., 2007. Imaging of fast moving electron-density structures in the polar cap. Annals of Geophysics, 50 (3), pp. 427-434.
Meggs, R. W., Mitchell, C. N. and Spencer, P. S. J., 2004. A comparison of techniques for mapping total electron content over Europe using GPS signals. Radio Science, 39 (1).
Davies, O. T., Mitchell, C. N., Spencer, P. S. J., Nash, J. D., Watson, R. J. and Watson, P. A., 2004. Application of GPS phase delay measurements in radio science and atmospheric studies. IEE Proceedings - Microwaves Antennas and Propagation, 151 (1), pp. 1-6.
Cilliers, P. J., Opperman, B. D. L., Mitchell, C. N. and Spencer, P. J., 2004. Electron density profiles determined from tomographic reconstruction of total electron content obtained from GPS dual frequency data: First results from the South African network of dual frequency GPS receiver stations. In: Iri: Quantifying Ionospheric Variability. Vol. 34. , pp. 2049-2055. (Advances in Space Research)
Yin, P., Mitchell, C. N., Spencer, P. S. J. and Foster, J. C., 2004. Ionospheric electron concentration imaging using GPS over the USA during the storm of July 2000. Geophysical Research Letters, 31 (12).
Kersley, L., Malan, D., Pryse, S. E., Cander, L. R., Bamford, R. A., Belehaki, A., Leitinger, R., Radicella, S. M., Mitchell, C. N. and Spencer, P. S. J., 2004. Total electron content - A key parameter in propagation: measurement and use in ionospheric imaging. Annals of Geophysics, 47 (2-3), pp. 1067-1091.
Mitchell, C. N. and Spencer, P. S. J., 2003. A three-dimensional time-dependent algorithm for ionospheric imaging using GPS. Annals of Geophysics, 46 (4), pp. 687-696.
Materassi, M., Mitchell, C. N. and Spencer, P. S. J., 2003. Ionospheric imaging of the northern crest of the Equatorial Anomaly. Journal of Atmospheric and Solar-Terrestrial Physics, 65 Nov-Dec (16-18), pp. 1393-1400.
Davies, O. T., Mitchell, C. N., Spencer, P. S. J. and Watson, P. A., 2001. Retrieval of the horizontal and vertical refractivity fields using GPS. In: Antennas and Propagation, 2001. Eleventh International Conference on (IEE Conf. Publ. No. 480), 2001-01-01.