Fejer, J. A.; Ierkic, H. M.; Woodman, R. F.; Röttger, J.; Sulzer, M.; Behnke, R. A.; Veldhuis, A.: Observations of the HF-enhanced plasma line with a 46.8-MHz radar and reinterpretation of previous observations with the 430-MHz radar. Journal Geophysical Research 88, pp. 2083 - 2092 (1983)
Larsen, M. F.; Röttger, J.: Comparison of tropopause height and frontal boundary locations based on radar and radiosonde data. Geophysical Research Letters 10, pp. 325 - 328 (1983)
Röttger, J.: EISCAT - Das europäische Incoherent-Scatter-Radar zur Erforschung der polaren Atmosphäre. Mitt. Astron. Gesellschaft 58, pp. 67 - 79 (1983)
Röttger, J.: Origin of refractive index fluctuations in the mesosphere as opposed to the stratosphere and troposphere. Handbook for MAP 9, pp. 143 - 144 (1983)
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).