Küppers, M.; Bertini, I.; Fornasier, S.; Gutierrez, P. J.; Hviid, S. F.; Jorda, L.; Keller, H. U.; Knollenberg, J.; Koschny, D.; Kramm, R.et al.; Lara, L.-M.; Sierks, H.; Thomas, N.; Barbieri, C.; Lamy, P.; Rickman, H.; Rodrigo, R.; the team, O.: A large dust/ice ratio in the nucleus of comet 9P/Tempel 1. Nature 437, pp. 987 - 990 (2005)
Smith, P. H.; Reynolds, R.; Weinberg, J.; Friedmann, T.; Lemmon, M. T.; Tanner, R.; Reid, R. J.; Marcialis, R. L.; Bos, B. J.; Oquest, C.et al.; Keller, H. U.; Markiewicz, W. J.; Kramm, R.; Gliem, F.; Rueffer, P.: The MVACS surface stereo imager on Mars Polar Lander. Journal Geophysical Research 106, pp. 17589 - 17608 (2001)
Reid, R. J.; Smith, P. H.; Lemmon, M.; Tanner, R.; Burkland, M.; Wegryn, E.; Weinberg, J.; Marcialis, R.; Britt, D. T.; Thomas, N.et al.; Kramm, R.; Dummel, A.; Crowe, D.; Bos, B. J.; Bell III, J. F.; Rüffer, P.; Gliem, F.; Johnson, J. R.; Maki, J. N.; Herkenhoff, K. E.; Singer, R. B.: Imager for Mars Pathfinder (IMP) image calibration. Journal Geophysical Research 104, pp. 8907 - 8925 (1999)
A'Hearn, M. F.; Brie, K.; Muller, C.; Burns, J. A.; Murray, C.; Cremonese, G.; Naletto, G.; Curdt, W.; Nevejans, D.; Deceuninck, H.et al.; Ragazzoni, R.; Angrilli, F.; Sabeau, L.; Emery, R.; Festou, M.; Sanz, A.; Fulle, M.; Sivan, J. P.; Ip, W. H.; Tondello, G.; Jorda, L.; Korth, A.; Llebaria, A.; Koschny, D.; Kramm, J. R.; Kuhrt, E.; Lara, L. M.; Thomas, N.; Keller, H. U.; Arijs, E.; Barbieri, C.; Grande, M.; Lamy, P.; Bailey, M.; Rickman, H.; Rodrigo, R.; Wenzel, K. P.; Lopez-Moreno, J. J.; Barucci, M. A.; Marzari, F.; Bertaux, J. L.; Moreau, D.: OSIRIS - the optical, spectroscopic and infrared remote imaging system for the Rosetta Orbiter. Advances in Space Research 21, pp. 1505 - 1515 (1998)
Kramm, J. R.; Thomas, N.; Keller, H. U.; Smith, P. H.: The CCD imager electronics of the Mars Pathfinder and Mars Surveyor cameras. IEEE Trans. Instr. Meas. 47 (5), pp. 1112 - 1118 (1998)
Keller, H. U.; Delamere, W. A.; Huebner, W. F.; Reitsema, H. J.; Schmidt, H. U.; Whipple, F. L.; Wilhelm, K.; Curdt, W.; Kramm, R.; Thomas, N.et al.; Arpigny, C.; Barbieri, C.; Bonnet, R. M.; Cazes, S.; Coradini, M.; Cosmovici, C. B.; Hughes, D. W.; Jamar, C.; Malaise, D.; Schmidt, K.; Schmidt, W. K. H.; Seige, P.: Comet P/Halley's nucleus and its activity. Astronomy and Astrophysics 187, pp. 807 - 823 (1987)
Keller, H. U.; Kramm, J. R.; Thomas, N.; Craubner, H.; Mikusch, E.; Schwarz, G.: Images of the GIOTTO fly-by of comet Halley. Bulletin of the American Society 19, p. 878 ff. (1987)
Kramm, J. R.; Möhring, W.; Keller, H. U.: Image restauration using the Point Spread Function of the Halley Multicolour Camera. Geophysical Research Letters 14 (7), pp. 677 - 680 (1987)
Schwarz, G.; Craubner, H.; Delamere, A.; Göbel, M.; Gonano, M.; Huebner, W. F.; Keller, H. U.; Kramm, R.; Mikusch, E.; Reitsema, H.et al.; Whipple, F. L.; Wilhelm, K.: Detailed analysis of a surface feature on comet P/Halley. Astronomy and Astrophysics 187, pp. 847 - 851 (1987)
Analyzing the high spatial resolution solar Ca II H and K emission data obtained by the SUNRISE mission and building a model of other stars more active than the Sun
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).
The magnetic field in the solar atmosphere exceeds the geomagnetic field strength by four orders of magnitude. It greatly influences the processes of energy transport within the solar atmosphere, and dominates the morphology of the solar chromosphere and corona. Kinetic energy from convective motions in the Sun can be efficiently stored in magnetic fields and subsequently released - to heat the solar corona to several million degrees or to blast off coronal mass ejections.