Items where Author is "Senior, A."

Mahmoudian, A. and Yeoman, T.K. and Senior, A. and Kosch, M.J. and Scales, W.A. and Shi, X. and Ruohoniemi, M. and Rietveld, M.T. (2020) Multi-frequency SuperDARN radar observations of the modulated ionosphere by high-power radio-waves at EISCAT. Advances in Space Research, 65 (12). pp. 2791-2799. ISSN 0273-1177

Mahmoudian, A. and Senior, A. and Kosch, M. and Scales, W.A. and Rietveld, M.T. and Isham, B. and Shi, X. and Ruohoniemi, M. (2019) Investigation of incoherent scatter radar spectra features with stimulated electromagnetic emissions at EISCAT. Advances in Space Research, 64 (1). pp. 159-170. ISSN 0273-1177

Mahmoudian, A. and Senior, A. and Scales, W.A. and Kosch, Michael J. and Rietveld, M.T. (2018) Dusty Space Plasma Diagnosis Using the Behavior of Polar Mesospheric Summer Echoes During Electron Precipitation Events. Journal of Geophysical Research: Space Physics, 123 (9). pp. 7697-7709. ISSN 2169-9380

Fu, H. Y. and Scales, W. A. and Bernhardt, P. A. and Briczinski, S. J. and Kosch, M. J. and Senior, A. and Rietveld, M. T. and Yeoman, T. K. and Ruohoniemi, J. M. (2015) Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT. Annales Geophysicae, 33 (8). pp. 983-990. ISSN 0992-7689

Havnes, O. and Pinedo, H. and La Hoz, C. and Senior, A. and Hartquist, T. W. and Rietveld, M. T. and Kosch, M. J. (2015) A comparison of overshoot modelling with observations of polar mesospheric summer echoes at radar frequencies of 56 and 224 MHz. Annales Geophysicae, 33 (6). pp. 737-747. ISSN 0992-7689

Senior, A. and Mahmoudian, A. and Pinedo, H. and La Hoz, C. and Rietveld, M. T. and Scales, W. A. and Kosch, M. J. (2014) First modulation of high-frequency polar mesospheric summer echoes by radio heating of the ionosphere. Geophysical Research Letters, 41 (15). pp. 5347-5353. ISSN 0094-8276

Bryers, C. J. and Kosch, M. J. and Senior, A. and Rietveld, M. T. and Singer, W. (2013) A comparison between resonant and nonresonant heating at EISCAT. Journal of Geophysical Research, 118 (10). pp. 6766-6776. ISSN 0148-0227

Senior, A. and Rietveld, M. T. and Häggström, I. and Kosch, M. J. (2013) Radio-induced incoherent scatter ion line enhancements with wide altitude extents in the high-latitude ionosphere. Geophysical Research Letters, 40 (9). pp. 1669-1674. ISSN 0094-8276

Honary, F. and Borisov, N. and Beharrell, M. and Senior, A. (2011) Temporal development of the magnetic zenith effect. Journal of Geophysical Research, 116 (n/a): A06309. ISSN 0148-0227

Senior, A. and Rietveld, M.T. and Honary, F. and Singer, W. and Kosch, M.J. (2011) Measurements and modeling of cosmic noise absorption changes due to radio heating of the D region ionosphere. Journal of Geophysical Research, 116 (A04310). pp. 1-10. ISSN 0148-0227

Routledge, G. and Kosch, M.J. and Senior, A. and Kavanagh, A.J. and McCrea, I.W. and Rietveld, M.T. (2011) A statistical survey of electron temperature enhancements in heater modulated polar mesospheric summer echoes at EISCAT. Journal of Atmospheric and Solar-Terrestrial Physics, 73 (4). pp. 472-482. ISSN 1364-6826

Woodfield, E.E. and Wild, J.A. and Kavanagh, A.J. and Senior, A. and Milan, S.E. (2010) Combining incoherent scatter radar data and IRI-2007 to monitor the open-closed field line boundary during substorms. Journal of Geophysical Research, 115. A00115. ISSN 0148-0227

Wild, P. and Honary, F. and Kavanagh, A.J. and Senior, A. (2010) Triangulating the height of cosmic noise absorption: A method for estimating the characteristic energy of precipitating electrons. Journal of Geophysical Research, 115 (A12326). pp. 1-11. ISSN 0148-0227

Senior, A. and Rietveld, M.T. and Kosch, M.J. and Singer, W. (2010) Diagnosing radio plasma heating in the polar summer mesosphere using cross modulation: Theory and observations. Journal of Geophysical Research, 115 (A09318). pp. 1-10. ISSN 0148-0227

Vanhamaki, H. and Kauristie, K. and Amm, O. and Senior, A. and Lummerzheim, D. and Milan, S. (2009) Electrodynamics of an omega-band as deduced from optical and magnetometer data. Annales Geophysicae, 27 (9). pp. 3367-3385. ISSN 0992-7689

Senior, A. and Honary, F. and Chapman, P.J. and Rietveld, M.T. and Kelso, T.S. and Kosch, M.J. (2008) High-frequency magnetospheric sounding at EISCAT: Some trials and their implications. Radio Science, 43 (RS4009). pp. 1-13. ISSN 0048-6604

Yeoman, T. K. and Chisham, G. and Baddeley, L. J. and Dhillion, R. S. and Karhunen, T. J. T. and Robinson, T. R. and Senior, A. and Wright, D. M. (2008) Mapping ionospheric backscatter measured by the SuperDARN HF radars - part 2: Assessing SuperDARN virtual height models. Annales Geophysicae, 26 (4). pp. 843-852. ISSN 0992-7689

Senior, A. and Kosch, M.J. and Honary, F. (2008) Comparison of methods to determine auroral ionospheric conductances using ground-based optical and riometer data. Annales Geophysicae, 26 (12). pp. 3831-3840. ISSN 0992-7689

Makarevich, R. A. and Senior, A. and Koustov, A. V. and Uspensky, M. and Honary, F. and Dyson, P. L. (2006) A study of aspect angle effects in the E-region irregularity velocity using multi-point electric field measurements. Geophysical Research Letters, 33 (21). L21102. ISSN 0094-8276

Kavanagh, A. J. and Honary, F. and Rietveld, M. T. and Senior, A. (2006) First observations of the artificial modulation of polar mesospheric winter echoes. Geophysical Research Letters, 33 (19). L19801. ISSN 0094-8276

Senior, A. and Kosch, M. J. and Yeoman, T. K. and Rietveld, M. T. and McCrea, I. W. (2006) Effects of high-latitude atmospheric gravity wave disturbances on artificial HF radar backscatter. Annales Geophysicae, 24 (9). pp. 2347-2361. ISSN 0992-7689

Makarevich, R. A. and Honary, F. and Howells, V. S. C. and Koustov, A. V. and Milan, S. E. and Davies, J. A. and Senior, A. and McCrea, I. W. and Dyson, P. L. (2006) A first comparison of irregularity and ion drift velocity measurements in the E-region. Annales Geophysicae, 24 (9). pp. 2375-2389. ISSN 0992-7689

Kosch, M. J. and Gustavsson, B. and Blixt, E. M. and Pedersen, T. and Senior, A. and Kavanagh, A. J. and Semeter, J. (2006) EISCAT radar and optical studies of black aurora: A signature of magnetospheric turbulence? In: Proceedings of the Eighth International Conference on Substorms (ICS8), 1900-01-01.

Kosch, M. J. and Pedersen, T. and Hughes, J. and Marshall, R. and Gerken, E. and Senior, A. and Sentman, D. and McCarrick, M. and Djuth, F. T. (2005) Artificial optical emissions at HAARP for pump frequencies near the third and second electron gyro-harmonic. Annales Geophysicae, 23 (5). pp. 1585-1592. ISSN 0992-7689

Enell, C.-F. and Kero, A. and Turunen, T. and Ulich, T. and Verronen, P. T. and Seppälä, A. and Marple, S. and Honary, F. and Senior, A. (2005) Effects of D-region RF heating studied with the Sodankyla ion chemistry model. Annales Geophysicae, 23 (5). pp. 1575-1583. ISSN 0992-7689

Borisov, N. and Senior, A. and Honary, F. (2005) Stationary state and relaxation of artificial irregularities excited in ionospheric heating experiments. Journal of Plasma Physics, 71 (3). pp. 315-334. ISSN 0022-3778

Senior, A. and Kosch, M.J. and Borisov, N.D. and Yeoman, T.K. and Rietveld, M.T. and Honary, F. (2005) Estimating the field-parallel scale length of artificial F-region striations by means of HF radar backscatter. In: Proceedings of the URSI XXVIII General Assembly, 1900-01-01.

Senior, A. and Borisov, N. D. and Kosch, M. J. and Yeoman, T. K. and Honary, F. and Rietveld, M. T. (2004) Multi-frequency HF radar measurements of artificial F-region field-aligned irregularities. Annales Geophysicae, 22 (10). pp. 3503-3511. ISSN 0992-7689

Kosch, M. J. and Rietveld, M. T. and Senior, A. and McCrea, I. W. and Kavanagh, A. J. and Isham, B. and Honary, F. (2004) Novel artificial optical annular structures in the high latitude ionosphere over EISCAT. Geophysical Research Letters, 31 (12). L12805 1-4. ISSN 0094-8276

Kavanagh, A. J. and Marple, S. R. and Honary, F. and McCrea, I. W. and Senior, A. (2004) On solar protons and polar cap absorption: Constraints on an empirical relationship. Annales Geophysicae, 22 (4). pp. 1133-1147. ISSN 0992-7689

Jones, T.B. and Wright, D.M. and Milner, J. and Yeoman, T.K. and Reid, T. and Chapman, P.J. and Senior, A. (2004) The detection of atmospheric waves produced by the total solar eclipse of 11 August 1999. Journal of Atmospheric and Solar-Terrestrial Physics, 66 (5). pp. 363-374. ISSN 1364-6826

Kavanagh, A. J. and Kosch, M. J. and Honary, F. and Senior, A. and Marple, S. R. and Woodfield, E. E. and McCrea, I. W. (2004) The statistical dependence of auroral absorption on geomagnetic and solar wind parameters. Annales Geophysicae, 22 (3). pp. 877-887. ISSN 0992-7689

Senior, A. and Honary, F. (2003) Observations of the spatial structure of electron precipitation pulsations using an imaging riometer. Annales Geophysicae, 21 (4). pp. 997-1003. ISSN 0992-7689

Kosch, M. J. and Rietveld, M. T. and Kavanagh, A. J. and Jussila, J. and Isham, B. and Kaila, K. and McCrea, I. W. and Senior, A. and Holma, H. and Honary, F. and Hagfors, T. (2002) High-latitude artificial aurora using the EISCAT high-gain HF facility. In: 29th General Assembly of the International Union of Radio Science, 1900-01-01.

Jones, T. B. and Wright, D. M. and Milner, J. and Yeoman, T. and Reid, T. and Senior, A. and Martinez, P. (2002) The detection of atmospheric waves produced by the total solar eclipse of 11 August 1999. In: 29th General Assembly of the International Union of Radio Science, 1900-01-01.