Items where Author is "Hagfors, T."

Kosch, M.J. and Pedersen, T. and Rietveld, M.T. and Gustavsson, B. and Grach, S.M. and Hagfors, T. (2007) Artificial optical emissions in the high-latitude thermosphere induced by powerful radio waves: An observational review. Advances in Space Research, 40 (3). pp. 365-376. ISSN 0273-1177

Tereshchenko, E. D. and Yurik, R. Yu. and Khudukon, B. Z. and Rietveld, M. T. and Isham, B. and Belyey, V. and Brekke, A. and Hagfors, T. and Grill, M. (2006) Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer. Annales Geophysicae, 24 (7). pp. 1819-1827. ISSN 0992-7689

Isham, B. and Hagfors, T. and Khudukon, B. and Yurik, R. Yu. and Tereshchenko, E. D. and Rietveld, M. T. and Belyey, V. and Grill, M. and Brekke, A. and Hoz, C. La and Heinselman, C. (2005) An interferometer experiment to explore the aspect angle dependence of stimulated electromagnetic emission spectra. Annales Geophysicae, 23. pp. 55-74. ISSN 0992-7689

Honary, F. and Chapman, P. and Grill, M. and Barratt, K. and Marple, S. and Nielsen, E. and Hagfors, T. (2005) Advanced Rio-Imaging Experiment in Scandinavia (ARIES): System specification and scientific goals. In: Proceedings of the URSI XXVIII General Assembly, 1900-01-01.

Hagfors, T. and Grill, M. and Honary, F. (2003) Performance comparison of cross correlation and filled aperture imaging riometers. Radio Science, 38 (6). 17/1-17/5. ISSN 0048-6604

Grill, M. and Honary, F. and Nielsen, E. and Hagfors, T. and Dekoulis, G. and Chapman, P. and Yamagishi, H. (2003) A new imaging riometer based on Mills Cross technique. In: 7th International Symposium on Communication Theory and Applications (ISCTA 2003), 2003-07-13 - 2003-07-18.

Cierpka, K. and Kosch, M. J. and Holma, H. and Kavanagh, A. J. and Hagfors, T. (2003) Novel Fabry-Perot interferometer measurements of F-region ion temperature. Geophysical Research Letters, 30 (6): 26. ISSN 0094-8276

Kosch, M. J. and Rietveld, M. T. and Kavanagh, A. J. and Davis, C. and Yeoman, T. K. and Honary, F. and Hagfors, T. (2002) High-latitude pump-induced optical emissions for frequencies close to the third electron gyro-harmonic. Geophysical Research Letters, 29 (23). pp. 2112-2115. ISSN 0094-8276

Kosch, M. J. and Rietveld, M. T. and Yeoman, T. K. and Cierpka, K. and Hagfors, T. (2002) The high-latitude artificial aurora of 21 February 1999: An analysis. Advances in Polar Upper Atmosphere Research, 16. pp. 1-12. ISSN 1345-1065

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.

Rietveld, M. T. and Isham, B. and Grydeland, T. and Hoz, C. La and Leyser, T. B. and Honary, F. and Ueda, H. and Kosch, M. and Hagfors, T. (2002) Hf-pump-induced parametric instabilities in the auroral E-region. Advances in Space Research, 29 (9). pp. 1363-1368. ISSN 0273-1177

Kosch, M.J. and Honary, F. and del Pozo, C.F. and Marple, S.R. and Hagfors, T. (2001) High-resolution maps of the characteristic energy of precipitating auroral particles. Journal of Geophysical Research, 106 (A12). pp. 28925-28937. ISSN 0148-0227

Kosch, M. J. and Rietveld, M. T. and Honary, F. and Hagfors, T. (2001) High latitude artificial aurora from EISCAT: An unique phenomenon? In: 28th Annual European Meeting on Atmospheric Studies by Optical Methods, 1900-01-01.

Kosch, M. J. and Cierpka, K. and Rietveld, M. T. and Hagfors, T. and Schlegel, K. (2001) High-latitude ground-based observations of the thermospheric ion-drag time constant. Geophysical Research Letters, 28 (7). pp. 1395-1398. ISSN 0094-8276

Kosch, M. J. and Rietveld, M. T. and Hagfors, T. and Leyser, T. B. (2000) High-latitude HF-induced airglow displaced equatorwards of the pump beam. Geophysical Research Letters, 27 (17). pp. 2817-2820. ISSN 0094-8276

Cierpka, K. and Kosch, M. J. and Nozawa, S. and Schlegel, K. and Kohsiek, A. and Hagfors, T. (2000) Combined EISCAT and Fabry-Perot Interferometer Measurements of Ionospheric-Thermospheric Coupling. Physics and Chemistry of the Earth, Part C: Solar, Terrestrial and Planetary Science, 25 (5-6). pp. 563-566. ISSN 1464-1917

Cierpka, K. and Kosch, M. J. and Rietveld, M. T. and Schlegel, K. and Hagfors, T. (2000) Direct Calculation of F-Region Joule Heating from Simultaneous Ion and Neutral Measurements at High Latitudes. Physics and Chemistry of the Earth Part B: Hydrology, Oceans and Atmosphere, 25 (5-6). pp. 439-442. ISSN 1464-1909

Cierpka, K. and Kosch, M. J. and Rietveld, M. T. and Schlegel, K. and Hagfors, T. (2000) Ion-neutral coupling in the high-latitude F-layer from incoherent scatter and Fabry-Perot measurements. Annales Geophysicae, 18 (9). pp. 1145-1153. ISSN 0992-7689

Kosch, M. J. and Ishi, M. and Nozawa, S. and Rees, D. and Cierpka, K. and Kohsiek, A. and Schlegel, K. and Fujii, R. and Hagfors, T. and Fuller-Rowell, T. J. and Lathuillere, C. (2000) A comparison of thermospheric winds and temperatures from Fabry-Perot Interferometer and EISCAT Radar measurements with models. Advances in Space Research, 26 (6). pp. 979-984. ISSN 0273-1177

Kosch, M. J. and Ishi, M. and Kohsiek, A. and Rees, D. and Schlegel, K. and Hagfors, T. and Cierpka, K. (2000) A comparison of vertical thermospheric winds from Fabry-Perot Interferometer measurements over a 50 km baseline. Advances in Space Research, 26 (6). pp. 985-988. ISSN 0273-1177

Kosch, M. J. and Nielsen, E. and Hagfors, T. (1998) A new digital all-sky imager for optical auroral studies in conjunction with the Scandinavian twin auroral radar experiment. Review of Scientific Instruments, 69 (2). pp. 578-584. ISSN 1089-7623

Kosch, M. J. and Hagfors, T. and Schlegel, K. (1998) Extrapolating EISCAT height-integrated Pedersen conductivites to other parts of the sky using ground-based TV auroral images. Annales Geophysicae, 16 (5). pp. 583-588. ISSN 0992-7689

Nielsen, E. and Hagfors, T. (1997) Plans for a new rio-imager experiment in Northern Scandinavia. Journal of Atmospheric and Solar-Terrestrial Physics, 59 (8). pp. 939-949. ISSN 1364-6826

Kosch, M. J. and Hagfors, T. and Rees, D. (1997) A new Fabry-Perot interferometer for atmospheric studies with the EISCAT incoherent radar. Advances in Space Research, 20 (6). pp. 1133-1136. ISSN 0273-1177