1978 Publications

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Refereed Publications

1. Nygrén, T., A synthesised trough ionogram, J. atmos. terr. Phys., 40, 1089, 1978.
2. Turunen, T. and T. Nygrén, Observation of gravity waves in the high latitude F-layer by using fixed frequency sounding, J. atmos. terr. Phys., 40, 1303. 1978.
3. Untiedt, J., R. Pellinen, F. Küppers, H. J. Opgenoorth, W.D. Pelster, W. Baumjohann, H. Ranta, J. Kangas, P. Czechowsky, and W.J. Heikkila, Obervations of the initial development of an auroral and magnetic substorm at magnetic midnight, J. Geophys., 45, 41, 1978.