Krymskii, A. M.; Breus, T.; Nielsen, E.: On possible observational evidence in electron density profiles of a magnetic field in the Martian ionosphere. Journal Geophysical Research 100, pp. 3721 - 3730 (1995)
Nielsen, E.; Axford, W. I.; Hagfors, T.; Kopka, H.; Armand, N. A.; Andrianov, V. A.; Shtern, D. J.; Breus, T.: The ``Long Wavelength Radar'' on the Mars-94 Orbiter. Advances in Space Research 15, pp. (4)163 - (4)178 (1995)
Luo, Y.; Pei-Ren, C.; Nielsen, E.: Single coherent radar multibeam measurements of the magnetospheric convection flows in the auroral E region. Journal Geophysical Research 99, pp. 11367 - 11377 (1994)
Haldoupis, C.; Schlegel, K.; Nielsen, E.: Some observations of radio auroral backscatter at 140 MHz during E-region electron gas heating. Annales Geophysicae 11, pp. 283 - 295 (1993)
Lewis, R. V.; Williams, P. J. S.; Yeoman, T. K.; Lester, M.; Nielsen, E.: Measurements of bursts in plasma velocity during substorm activity. Advances in Space Research 13, pp. (4)139 - (4)142 (1993)
Nielsen, E.; Elphinstone, R.; Hearn, D.; Murphree, J. S.; Potemra, T.: Oval intensification event observed by STARE and Viking. Journal Geophysical Research 98, pp. 6163 - 6171 (1993)
Ierkic, H. M.; Haldoupis, C.; Moorcroft, D. R.; Nielsen, E.: Coherent radar interferometry of vertical irregularity structures in the auroral E region. Radio Science 27, pp. 743 - 758 (1992)
Kohl, H.; Nielsen, E.; Rinnert, K.; Schlegel, K.: EISCAT results during the ROSE campaign and comparison with STARE measurements. Journal of Atmospheric and Terrestrial Physics 54, pp. 733 - 739 (1992)
Lambert, M.; Nielsen, E.; Bruns, G.: Conjugate observations of the auroral ionosphere using multi narrow-beam riometers. Annales Geophysicae 10, pp. 566 - 576 (1992)
Pfaff, R. F.; Sahr, J.; Providakes, J. F.; Schwarz, W. E.; Farley, D. T.; Kintner, P. M.; Häggström, I.; Hedberg, A.; Opgenoorth, H.; Holmgren, G.et al.; McNamara, A.; Wallis, D.; Whalen, B.; Yau, A.; Watanabe, S.; Creutzberg, F.; Williams, P.; Nielsen, E.; Schlegel, K.; Robinson, T. R.: The E-region rocket/radar instability study (ERRRIS): scientific objectives and campaign overview. Journal of Atmospheric and Terrestrial Physics 54, pp. 779 - 808 (1992)
Sutcliffe, P. R.; Nielsen, E.: The ionospheric signature of Pi 2 pulsations observed by STARE. Journal Geophysical Research 97, pp. 10621 - 10636 (1992)
Williams, P. J. S.; Lewis, R. V.; Virdi, T. S.; Lester, M.; Nielsen, E.: Plasma flow bursts in the auroral electrojets. Annales Geophysicae 10, pp. 835 - 848 (1992)
Marvlag, E.; Scourfield, M. W. J.; Walker, A. D. M.; Sutcliefe, P. R.; Nielsen, E.: Simultaneous observations of omega band related phenomena in both hemispheres. Journal of Atmospheric and Terrestrial Physics 53, pp. 309 - 317 (1991)
Haldoupis, C.; Nielsen, E.; Schlegel, K.: Dependence of radar auroral scattering cross section on the ambient electron density and the destabilizing electric field. Annales Geophysicae 8, pp. 195 - 212 (1990)
Kofman, W.; Nielsen, E.: STARE and EISCAT measurements: Evidence for the Limitation of the STARE observations by ion-acoustic velocity. Journal Geophysical Research 95, p. 19131 (1990)
Nielsen, E.; Craven, J. D.; Frank, L. A.; Heelis, R. A.: Ionospheric flows associated with a transpolar arc. Journal Geophysical Research 95, p. 21169 (1990)
The dwarf planet is a bizarre, cryovolcanic world. However, the organic deposits discovered on its surface so far are unlikely to originate from its interior.
The Uranian magnetic field is more expansive than previously thought, according to newly analyzed data from Voyager 2, making it easier to search for moons with oceans.
The Planetary Plasma Environments group (PPE) has a strong heritage in the exploration of planetary magnetospheres and space plasma interactions throughout the solar system. It has contributed instruments to several past missions that flew-by or orbited Jupiter (Galileo, Cassini, Ulysses). The PPE participates in the JUICE mission by contributing hardware and scientific expertise to the Particle Environment Package (PEP).