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)
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)
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)
Röttger, J.; Larsen, M. F.; Ierkic, H. M.; Hagfors, T.: Need for a subtropical wind profiling system. Handbook for MAP (Middle Atmosphere Program) 20, pp. 86 - 89 (1986)
Hagfors, T.; Gold, T.; Ierkic, H. M.: Refraction scattering as origin of the anomalous radar returns of Jupiter's satellites. Nature 315 (6021), pp. 637 - 640 (1985)
Röttger, J.; Ierkic, H. M.: Postset beam steering and interferometer applications of VHF radars to study winds, waves and turbulence in the lower and middle atmosphere. Radio Science 20, pp. 1461 - 1480 (1985)
Haldoupis, C. I.; Nielsen, E.; Ierkic, H. M.: STARE Doppler spectral studies of westward electrojet radar aurora. Planetary and Space Science 32, p. 1291 (1984)
Ierkic, H. M.; Röttger, J.: Mesospheric measurements of irregularity patches using a 3-antenna interferometer. Handbook for MAP 14, pp. 174 - 178 (1984)
Nielsen, E.; Haldoupis, C. I.; Fejer, B. G.; Ierkic, H. M.: Dependence of auroral power spectral variations upon electron drift velocity in the eastward electrojet. Journal Geophysical Research 89, pp. 253 - 260 (1984)
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)
Whitehead, J. D.; Ierkic, H. M.; Nielsen, E.: Splitting and divergence of ``STARE'' auroral radar velocities. Journal Geophysical Research 88, p. 2147 (1983)
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).
First Light for Sunrise III: the first tests with real sunlight were successful. The balloon-borne solar observatory should be ready for launch at the end of May.