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Publications

Damtie, B., Lehtinen, M., Orispää, M., & Vierinen, J. (2007). Optimal long binary phase code-mismatched filter pairs with applications to ionospheric radars. In Bulletin of the Astronomical Society of India (Vol. 35, pp. 619–623). Presented at the Bulletin of the Astronomical Society of India.
Vierinen, J., Lehtinen, M. S., Orispää, M., & Virtanen, I. I. (2008). Transmission code optimization method for incoherent scatter radar. Annales Geophysicae-Atmospheres Hydrospheres And Space Sciences, 26(9), 2923–2927.
Virtanen, I. I., Lehtinen, M. S., Nygrén, T., Orispää, M., & Vierinen, J. (2008). Lag profile inversion method for EISCAT data analysis. Annales Geophysicae-Atmospheres Hydrospheres And Space Sciences, 26(3), 571–581.
Damtie, B., Lehtinen, M., Orispää, M., & Vierinen, J. (2008). Mismatched filtering of aperiodic quadriphase codes. IEEE TRANSACTIONS ON INFORMATION THEORY, 54(4), 1742–1749.
Lehtinen, M., Damtie, B., Piiroinen, P., & Orispää, M. (2009). PERFECT AND ALMOST PERFECT PULSE COMPRESSION CODES FOR RANGE SPREAD RADAR TARGETS. Inverse Problems And Imaging, 3(3), 465–486. doi:10.3934/ipi.2009.3.465
Orispää, M., & Lehtinen, M. (2010). Fortran linear inverse problem solver. Inverse Problems And Imaging, 4(3), 485–503.
Roininen, L., Lehtinen, M. S., Lasanen, S., Orispää, M., & Markkanen, M. (2011). Correlation priors. Inverse Problems And Imaging, 5(1), 167–184.
Martini, D., Orispää, M., Ulich, T., Lehtinen, M., Mursula, K., & Lee, D.-H. (2011). Kalman filter technique for defining solar regular geomagnetic variations: Comparison of analog and digital methods at Sodankylä Observatory. Journal of Geophysical Research A: Space Physics, 116(6).
Virtanen, I., Lind, F., Roininen, L., Erickson, P., Rideout, W., Orispää, M., Vierinen, J. & Lehtinen M. (2013). Polyphase-coded incoherent scatter measurements at Millstone Hill. Radio Science, Vol. 48, 519-526, doi:10.1002/rds.20058
Fallows, R. A., Coles, W. A., McKay-Bukowski, D., Vierinen, J., Virtanen, I. I., Postila, M., Ulich, Th., Enell, C.-F., Kero, A., Iinatti, T., Lehtinen, M., Orispää, M., Raita, T., Roininen, L.,Turunen, E., Brentjens, M., Ebbendorf, N., Gerbers, M., Grit, T., Gruppen, P., Meulman, H., Norden, M., de Reijer, J.-P., Schoenmakers, A. & Stuurwold, K. (2014)., Journal of Geophysical Research: Space Physics, 119(12), 10544–10560.
McKay-Bukowski, D., Vierinen, J., Virtanen, I., Fallows, R., Postila, M., Ulich, T., Wucknitz, O., Brentjens, M., Ebbendorf, N., Enell, C.-F., Gerbers, M., Grit, T., Gruppen, P., Kero, A., Iinatti, T., Lehtinen, M., Meulman, H., Norden, M., Orispää, M., Raita, T., de Reijer, J. P., Roininen, L., Schoenmakers, A., Stuurwold, K. & Turunen, E. (2015). KAIRA: The Kilpisjärvi Atmospheric Imaging Receiver Array - System overview and first results. IEEE Transactions on Geoscience and Remote Sensing, 53(3), 1440-1451.
Martini, D., Mursula. K., Orispää, M. & Linthe, H.-J. (2015). Long-term decrease in the response of midlatitude stations to high-speed solar wind streams in 1914–2000, Journal of Geophysical Research: Space Physics, 120, doi:10.1002/2014JA020813.
Norberg, J., Virtanen, I. I., Roininen, L., Vierinen, J., Orispää, M., Kauristie, K., & Lehtinen, M. S. (2016). Bayesian statistical ionospheric tomography improved by incorporating ionosonde measurements, Atmos. Meas. Tech., 9, 1859-1869, doi:10.5194/amt-9-1859-2016.
Roininen, L., Lasanen, S., Orispää M. & Särkkä, S. (2018). Sparse approximations of fractional Matérn field, Scandinavian Jornal of Statistics, 45(1), 194-216, doi:10.1111/sjos.12297
Norberg, J., Vierinen, J., Roininen, L., Orispää, M., Kauristie, K., Rideout, WC., Coster, AJ. & Lehtinen, MS. (2018).Gaussian Markov Random Field Priors in Ionospheric 3-D Multi-Instrument Tomography,IEEE Transactions on Geoscience and Remote Sensing, 56(12), 7009-7021, doi:10.1109/TGRS.2018.2847026.
Lehtinen, M., Damtie, B. & Orispää, M. (2019). Optimal True Time delay filter with application to FPGA firmware based phased array radar signal processing, Radio Science, doi:10.1029/2019RS006821