Search Results - "SYRJÄSUO, M"

Solar cycle and diurnal dependence of auroral structures by Partamies, N., Whiter, D., Syrjäsuo, M., Kauristie, K.

“…In order to facilitate usage of optical data in space climate studies, we have developed an automated algorithm to quantify the complexity of auroral…”
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Intensification of preexisting auroral arc at substorm expansion phase onset: Wave-like disruption during the first tens of seconds by Liang, Jun, Donovan, E. F., Liu, W. W., Jackel, B., Syrjäsuo, M., Mende, S. B., Frey, H. U., Angelopoulos, V., Connors, M.

“…With the deployment of the all‐sky imager array of the THEMIS mission, we were able to construct a preliminary database of auroral substorm expansion phase…”
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Performance study of the new EMCCD-based all-sky cameras for auroral imaging by Sangalli, L, Partamies, N, Syrjäsuo, M, Enell, C.-F, Kauristie, K, Mäkinen, S

“…The Magnetometers Ionospheric Radars All-sky Cameras Large Experiment (MIRACLE) network monitors auroral activity in the Fennoscandian sector. Network stations…”
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Simultaneous THEMIS in situ and auroral observations of a small substorm by Donovan, E., Liu, W., Liang, J., Spanswick, E., Voronkov, I., Connors, M., Syrjäsuo, M., Baker, G., Jackel, B., Trondsen, T., Greffen, M., Angelopoulos, V., Russell, C. T., Mende, S. B., Frey, H. U., Keiling, A., Carlson, C. W., McFadden, J. P., Glassmeier, K.-H., Auster, U., Hayashi, K., Sakaguchi, K., Shiokawa, K., Wild, J. A., Rae, I. J.

“…We present ground‐based and in situ observations from March 13, 2007. The THEMIS satellites were in the evening sector conjugate to THEMIS ground‐based…”
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Observations of the auroral width spectrum at kilometre-scale size by PARTAMIES, N, SYRJÄSUO, M, DONOVAN, E, CONNORS, M, CHARROIS, D, KNUDSEN, D, KRYZANOWSKY, Z

“…This study examines auroral colour camera data from the Canadian Dense Array Imaging SYstem (DAISY). The Dense Array consists of three imagers with different…”
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Auroral spectral estimation with wide-band color mosaic CCDs by Jackel, B. J, Unick, C, Syrjäsuo, M. T, Partamies, N, Wild, J. A, Woodfield, E. E, McWhirter, I, Kendall, E, Spanswick, E

“…Optical aurora can be structured over a wide range of spatial and temporal scales with spectral features that depend on the energy of precipitating particles…”
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Solar Intensity X-ray and particle Spectrometer (SIXS) by Huovelin, J., Vainio, R., Andersson, H., Valtonen, E., Alha, L., Mälkki, A., Grande, M., Fraser, G.W., Kato, M., Koskinen, H., Muinonen, K., Näränen, J., Schmidt, W., Syrjäsuo, M., Anttila, M., Vihavainen, T., Kiuru, E., Roos, M., Peltonen, J., Lehti, J., Talvioja, M., Portin, P., Prydderch, M.

“…The Solar Intensity X-ray and particle Spectrometer (SIXS) on the BepiColombo Mercury Planetary Orbiter (MPO) will investigate the direct solar X-rays, and…”
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The mercury imaging X-ray spectrometer (MIXS) on bepicolombo by Fraser, G.W., Carpenter, J.D., Rothery, D.A., Pearson, J.F., Martindale, A., Huovelin, J., Treis, J., Anand, M., Anttila, M., Ashcroft, M., Benkoff, J., Bland, P., Bowyer, A., Bradley, A., Bridges, J., Brown, C., Bulloch, C., Bunce, E.J., Christensen, U., Evans, M., Fairbend, R., Feasey, M., Giannini, F., Hermann, S., Hesse, M., Hilchenbach, M., Jorden, T., Joy, K., Kaipiainen, M., Kitchingman, I., Lechner, P., Lutz, G., Malkki, A., Muinonen, K., Näränen, J., Portin, P., Prydderch, M., Juan, J. San, Sclater, E., Schyns, E., Stevenson, T.J., Strüder, L., Syrjasuo, M., Talboys, D., Thomas, P., Whitford, C., Whitehead, S.

“…The Mercury Imaging X-ray Spectrometer (MIXS) on the BepiColombo Mercury Planetary Orbiter (MPO) will measure fluorescent X-ray emission from the surface of…”
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Global auroral imaging in the ILWS era by Donovan, E., Trondsen, T., Spann, J., Liu, W., Spanswick, E., Lester, M., Tu, C.-Y., Ridley, A., Henderson, M., Immel, T., Mende, S., Bonnell, J., Syrjäsuo, M., Sofko, G., Cogger, L., Murphree, J., Jayachandran, P.T., Pulkkinen, T., Rankin, R., Sigwarth, J.

“…The overarching objective of the ILWS Geospace program is to facilitate system level science. This demands synoptic observations such as global auroral…”
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Auroral breakup detection in all-sky images by unsupervised learning by Partamies, Noora, Dol, Bas, Teissier, Vincent, Juusola, Liisa, Syrjäsuo, Mikko, Mulders, Hjalmar

“…Due to a large number of automatic auroral camera systems on the ground, image data analysis requires more efficiency than what human expert visual inspection…”
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Diurnal auroral occurrence statistics obtained via machine vision by SYRJÄSUO, M. T, DONOVAN, E. F

“…Modern ground-based digital auroral All-Sky Imager (ASI) networks capture millions of images annually. Machine vision techniques are widely utilised in the…”
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Reconciliation of the substorm onset determined on the ground and at the Polar spacecraft by Toivanen, P. K., Baker, D. N., Peterson, W. K., Singer, H. J., Turner, N. E., Li, X., Kauristie, K., Syrjäsuo, M., Viljanen, A., Pulkkinen, T. I., Keiling, A., Wygant, J. R., Kletzing, C. A.

“…An isolated substorm on Oct. 17, 1997 during a close conjunction of the Polar spacecraft and the ground‐based MIRACLE network is studied in detail. We identify…”
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Solar wind control of magnetospheric energy content: Substorm quenching and multiple onsets by Karlsson, S. B. P., Opgenoorth, H. J., Eglitis, P., Kauristie, K., Syrjäsuo, M., Pulkkinen, T., Lockwood, M., Nakamura, R., Reeves, G., Romanov, S.

“…In this paper we report coordinated multispacecraft and ground‐based observations of a double substorm onset close to Scandinavia on November 17, 1996. The…”
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Ground-based and satellite observations of high-latitude auroral activity in the dusk sector of the auroral oval by Kauristie, K., Pulkkinen, T. I., Amm, O., Viljanen, A., Syrjäsuo, M., Janhunen, P., Massetti, S., Orsini, S., Candidi, M., Watermann, J., Donovan, E., Prikryl, P., Mann, I. R., Eglitis, P., Smith, C., Denig, W. F., Opgenoorth, H. J., Lockwood, M., Dunlop, M., Vaivads, A., André, M.

“…On 7 December 2000, during 13:30–15:30 UT the MIRACLE all-sky camera at Ny Ålesund observed auroras at high-latitudes (MLAT ~ 76) simultaneously when the…”
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Auroral precipitation fading before and at substorm onset : ionospheric and geostationary signatures by KAURISTIE, K, PULKKINEN, T. I, HUUSKONEN, A, PELLINEN, R. J, OPGENOORTH, H. J, BAKER, D. N, KORTH, A, SYRJÄSUO, M

“…Rapid fading of auroral activity a few minutes before substorm breakup has earlier been analyzed in case-studies. Here we report on a study in which all-sky…”
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Performance study of the new EMCCD-based all-sky cameras for auroral imaging: Atmospheric Studies by Optical Methods. 36th Annual Meeting by SANGALLI, L, PARTAMIES, N, SYRJÄSUO, M, ENELL, C.-F, KAURISTIE, K, MÄKINEN, S

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Plasma sheet ion injections into the auroral bulge: Correlative study of spacecraft and ground observations by Sergeev, V. A., Sauvaud, J.‐A., Popescu, D., Kovrazhkin, R. A., Lutsenko, V. N., Zelenyi, L. M., Syrjasuo, M., Viljanen, A., Pulkkinen, T. I., Kudela, K., Kokubun, S., Mukai, T.

“…Multiple and sporadic time‐of‐flight velocity dispersed ion structures (TDIS) are systematically observed above the ionosphere at ∼3 Re altitude by…”
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Solar Intensity X-Ray Spectrometer (SIXS) ASIC onboard the ESA BepiColombo mission to Mercury by Khalid, F.F., Prydderch, M.L., Morrissey, Q., Seller, P., Valtonen, E., Peltonen, J., Syrjasuo, M., Vainio, R., Huovelin, J.

“…The new SIXS prototype ASIC has been designed for detecting and measuring solar X-rays in a Mercury orbit onboard BepiColombo. The SIXS detector consists of a…”
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A search engine for auroral forms by Syrjäsuo, M.T, Kauristie, K, Pulkkinen, T.I

“…The Finnish Meteorological Institute operates five digital all-sky cameras, which routinely monitor the auroral emissions in Northern Finland, Sweden, and…”
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Intensification of preexisting auroral arc at substorm expansion phase onset : Wave-like disruption during the first tens of seconds : First results from the time history of events and macroscale interactions during substorms mission (october) THEMIS1 by JUN LIANG, DONOVAN, E. F, LIU, W. W, JACKEL, B, SYRJÄSUO, M, MENDE, S. B, FREY, H. U, ANGELOPOULOS, V, CONNORS, M

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