Chao, J. K.; Kuo, F. S.; Chu, Y. S.; Fu, I.-J.; Röttger, J.; Liu, C. H.: The first operation and results of the Chung-Li VHF radar. Handbook for MAP 20, pp. 359 - 363 (1986)
Holden, D. N.; Ulbrich, C. W.; Larsen, M. F.; Röttger, J.; Ierkic, H. M.; Swartz, W.: UHF and VHF radar observations of thunderstorms. Handbook for MAP 20, pp. 288 - 292 (1986)
Ierkic, H. M.; Röttger, J.; Hagen, J. B.; Zimmerman, R. K.: Method to determine the optimal parameters of the Arecibo 46.8 MHz antenna system. Handbook for MAP 20, pp. 420 - 424 (1986)
Larsen, M. F.; Röttger, J.; Dennis, T. S.: Comparison of vertical velocities analyzed by a numerical model and measured by a VHF wind profiler. Handbook for MAP 20, pp. 44 - 47 (1986)
Larsen, M. F.; Röttger, J.; Holden, D. N.: Observations of vertical velocity power spectra with the SOUSY VHF radar. Handbook for MAP 20, pp. 231 - 235 (1986)
Maekawa, Y.; Aso, T.; Röttger, J.; Czechowsky, P.; Rüster, R.; Schmidt, G.; Hirota, I.; Woodman, R. F.; Kato, S.: A cooperative synchronous observation of winds and tides in the equatorial lower stratosphere and mesosphere using VHF radars at Jicamarca and Arecibo. J. Geomag. Geoelectr. 38, pp. 81 - 97 (1986)
Rastogi, P. K.; Mathews, J. D.; Röttger, J.: Simultaneous VHF and UHF radar observation of the mesosphere at Arecibo during a solar flare: a check on the gradient-mixing hypothesis. Handbook for MAP 20, pp. 103 - 110 (1986)
Röttger, J.: The use of the experimentally deduced Brunt-Väisälä frequency and turbulent velocity fluctuations to estimate the eddy diffusion coefficient. Handbook for MAP 20, pp. 173 - 178 (1986)
Röttger, J.: Comparison of reflectivity and wind profiles measured on 46.8 MHz and 430 MHz at the Arecibo Observatory. Handbook for MAP 20, pp. 307 - 308 (1986)
Röttger, J.; Fu, I.-J.; Kuo, F. S.; Liu, C. H.; Chao, J. K.: On the use of colour reflectivity plots to monitor the structure of the troposphere and stratosphere. Handbook for MAP 20, pp. 489 - 490 (1986)
Röttger, J.; Ierkic, H. M.; Zimmerman, R. K.; Hagen, J.: Investigations of the lower and middle atmosphere at the Arecibo Observatory and a description of the new VHF radar project. Handbook for MAP 20, pp. 349 - 358 (1986)
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).