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    Typical Behaviour of the High Latitude Lower Ionosphere

    Friedrich, M. / Torkar, K. M. / Committee on Space Research; Scientific Commission C | British Library Conference Proceedings | 1995

    Towards neural network based models for the ionospheric D-region

    McKinnell, L.-A. / Friedrich, M. / European Space Agency et al. | British Library Conference Proceedings | 2003

    Timetable-Based Transit Assignment Using Branch and Bound Techniques

    Friedrich, M. / Hofsaess, I. / Wekeck, S. et al. | British Library Conference Proceedings | 2001

    Thin Ion Layers in the High-latitude Lower Ionosphere

    Kirkwood, S. / COSPAR; Scientific Commission C | British Library Conference Proceedings | 1997

    Theoretical Distribution of O^+ Ions in the Martian Magnetosphere

    Shi, J. K. / Schwingenschuh, K. / Zhang, T.-L. et al. | British Library Conference Proceedings | 2001

    The Midas experiment for the Rosetta mission

    Riedler, W. / Torkar, K. / Ruedenauer, F. et al. | British Library Conference Proceedings | 1998

    The Influence of the Photosheath on the Very Low Energy Electrons During Active Potential Control

    Zhoa, H. / Torkar, K. / Schmidt, R. et al. | British Library Conference Proceedings | 1998

    The DROPPS Program to Study the Polar Summer Mesosphere

    Goldberg, R. A. / Plaff, R. F. / Holzworth, R. H. et al. | British Library Conference Proceedings | 2001

    The D-Region Background at High Latitudes

    Friedrich, M. / Kirkwood, S. / International Council of Scientific Unions; Committee on Space Research; Scientific Commission C | British Library Conference Proceedings | 1999

    The Charge Balance in the Presence of Meteoric Smoke in the Upper Mesosphere under Winter Conditions - Preliminary Results

    Hoppe, U.-P. / Friedrich, M. / Blix, T.A. et al. | British Library Conference Proceedings | 2011

    The Anomalous Winter Ion Layer - A Mystery Waiting for a Sounding Rocket

    Kirkwood, S. / European Space Agency; Programme Advisory Committee on the Special Project concerning the Launching of Sounding Rockets | British Library Conference Proceedings | 1997

    Temporal Variation of the Distribution Function and Acceleration of O^+ Ions During Substorm Dipolarization

    Shi, J. K. / Liu, Z. X. / Torkar, K. et al. | British Library Conference Proceedings | 2002

    Temperature Variations Seen by High Resolution Radiosondes as Signs of Turbulence, Comparison with ESRAD

    Mihalikova, M. / Kirkwood, S. / Mikhaylova, D. et al. | British Library Conference Proceedings | 2011

    RIPAN: A Remotely Controlled Aircraft Project for Troposphere/Stratosphere Research

    Chilson, P. / Johansson, P. / Johnsson, M. et al et al. | British Library Conference Proceedings | 1999

    Results from a new auroral lower ionosphere model

    McKinnell, L. A. / Friedrich, M. / COSPAR | British Library Conference Proceedings | 2006

      Results from a new auroral lower ionosphere model

      McKinnell, L. A. / Friedrich, M. / COSPAR | British Library Conference Proceedings | 2006

    Recent Experience With Spacecraft Potential Control

    Torkar, K. / Fehringer, M. / Escoubet, C. P. et al. | British Library Conference Proceedings | 1999

    Propagation of Electromagnetic Waves in the Lower Ionosphere of Titan

    Schwingenschuh, K. / Molina-Cuberos, G. J. / Eichelberger, H. U. et al. | British Library Conference Proceedings | 2001

    Polar mesosphere winter echoes during MaCWAVE

    Kirkwood, S. / Belova, E. / Dalin, P. et al. | British Library Conference Proceedings | 2003

    Polar Mesocyclones and their Extension to the UTLS - A Case Study Using ESRAD, Odin and MaCWAVE Radiosondes

    Kirkwood, S. / European Space Agency | British Library Conference Proceedings | 2007

    Plans for Austrian Contributions to Balloon Campaigns in Conjunction with the Cluster, Interball, and Polar Spacecraft

    Torkar, K. / Slamanig, H. / Riedler, W. et al. | British Library Conference Proceedings | 1995

    Observation of mesosphere summer echoes with calibrated VHF radars at latitudes between 54^oN and 69^oN in summer 2004

    Latteck, R. / Singer, W. / Kirkwood, S. et al. | British Library Conference Proceedings | 2005

    NITTANYSAT - A Student Satellite Mission for D-Region Study and Calibration of Riometers

    Friedrich, M. / European Space Agency | British Library Conference Proceedings | 2007

    Multi-Radar Observations of Polar Mesosphere Summer Echoes During the PHOCUS Campaign on 21 July 2011

    Belova, E. / Kirkwood, S. / Zecha, M. et al. | British Library Conference Proceedings | 2013

    MST Radar Study of Lee Waves during Winter 1996/97, 1997/98 and 1998/99 in Northern Scandinavia

    Stebel, K. / Kirkwood, S. / European Space Agency; Programme Advisory Committee on the Special Project concerning the Launching of Sounding Rockets | British Library Conference Proceedings | 1999

    MST-Radar Lee Wave Observations during Winter 1996/97 in Northern Scandinavia

    Stebel, K. / Chilson, P. / Barabash, et al. et al. | British Library Conference Proceedings | 1997

    Magnetospheric Substorm Studies Using Balloons

    Lazutin, L. / Riedler, W. / Torkar, K. et al. | British Library Conference Proceedings | 2000

    Long-Term Trends and other Residual Features of the Lower Ionosphere

    Friedrich, M. / Torkar, K. M. / European Space Agency et al. | British Library Conference Proceedings | 2001

    Ionospheric Constraints for Mesospheric Nitric Oxide Based on Empirical Models of the D-Region

    Friedrich, M. / Torkar, K. M. / International Council of Scientific Unions; Committee on Space Research; Scientific Commission C | British Library Conference Proceedings | 1999

    Investigation of atmospheric neutral constituents by photoionization techniques

    Croskey, C. L. / Mitchell, J. D. / Friedrich, M. et al. | British Library Conference Proceedings | 2003

    In Situ Observations of a Dying Sporadic E-Layer

    Friedrich, M. / Torkar, K. / Rapp, M. et al. | British Library Conference Proceedings | 2009

    Initial Results of a Rocket-Based Study of Gravity Wave Effects on Photoionization in the Middle Atomosphere

    Croskey, C. L. / Mitchell, J. D. / Friedrich, M. et al. | British Library Conference Proceedings | 2003

    Independent Calibration of Radar Reflectivities Using Radiosondes: Application to ESRAD

    Kirkwood, S. / Mihalikova, M. / Mikhaylova, D. et al. | British Library Conference Proceedings | 2011

    Improvement of plasma measurements onboard Cluster due to spacecraft potential control

    Torkar, K. / Svenes, K. R. / Fazakerley, A. et al. | British Library Conference Proceedings | 2005

    Formation mechanisms for low-altitude sporadic-E layers - Results from the METAL campaign

    Kirkwood, S. / Von Zahn, U. / European Space Agency | British Library Conference Proceedings | 1994

    First results of the polar cap ionosphere based on EISCAT Svalbard and Heiss Island rocket data

    Friedrich, M. / Egger, G. / Torkar, K. M. et al. | British Library Conference Proceedings | 2006

      First results of the polar cap ionosphere based on EISCAT Svalbard and Heiss Island rocket data

      Friedrich, M. / Egger, G. / Torkar, K. M. et al. | British Library Conference Proceedings | 2006

    ESRAD, Esrange MST Radar

    Olsen, P.-E. / Marcus, L. / Kirkwood, S. et al. | British Library Conference Proceedings | 1997

    ESRAD/EISCAT polar mesosphere winter echoes during MAGIC and ROMA

    Kirkwood, S. / Belova, E. / Chilson, P. et al. | British Library Conference Proceedings | 2005

    Energetic Electron Precipitation During Auroral Events Observed by Incoherent Scatter Radar

    Osepian, A. / Kirkwood, S. / Smirnova, N. et al. | British Library Conference Proceedings | 1995

    Empirical recombination rates in the lower ionosphere

    Friedrich, M. / Torkar, K. M. / Steiner, R. J. et al. | British Library Conference Proceedings | 2004

    Empirical D-Region Modelling, a Progress Report

    Friedrich, M. / Torkar, K. M. / International Council of Scientific Union; Committee on Space Research | British Library Conference Proceedings | 1998

    Electron Temperature Dependence of PMSE Power: Experimental and Modelling Results

    Belova, E. / Chilson, P. / Rapp, M. et al. | British Library Conference Proceedings | 2001

    Electron Loss and Meteoric Dust in the Mesosphere

    Friedrich, M. / Rapp, M. / Blix, T. et al. | British Library Conference Proceedings | 2011

    D-region electron densities obtained by differential absorption and phase measurements with a 3-MHz Doppler radar

    Singer, W. / Latteck, R. / Friedrich, M. et al. | British Library Conference Proceedings | 2005

    Comparison of Plasma Probes in the Lower Ionosphere

    Friedrich, M. / Torkar, K. M. / Goldberg, R. A. et al. et al. | British Library Conference Proceedings | 1997

    Comparison Between an Empirical and a Theoretical Model of the D-Region

    Friedrich, M. / Torkar, K. M. / International Council of Scientific Unions; Committee on Space Research; Scientific Commission C | British Library Conference Proceedings | 1998

    Common Features of Plasma Density Profiles During NLC

    Friedrich, M. / Torkar, K. M. / Thrane, E. V. et al. | British Library Conference Proceedings | 1994

    Climatology of Ozone in the Troposphere and Lower Stratosphere Over the European Arctic

    Rao, T. N. / Arvelius, J. / Kirkwood, S. et al. | British Library Conference Proceedings | 2004

    Charged Particle Measurements in the Polar Summer Mesosphere Obtained By the DROPPS Sounding Rockets

    Croskey, C. L. / Mitchell, J. D. / Friedrich, M. et al. | British Library Conference Proceedings | 2001

    Bonus Results from Ion Probes

    Friedrich, M. / Torkar, K. / Robertson, S. et al. | British Library Conference Proceedings | 2013