Hans─Peter Roeser

Implications of the Central Flash Analysis from the 2015 Pluto Stellar Occultation

Amanda S. Bosh, Amanda A. Sickafoose, C. A. Zuluaga, S. E. Levine et autres

SOFIA's secondary mirror assembly: in-flight performance and control approach

Andreas Reinacher, Yannick Lammen, Hans─Peter Roeser

The Stratospheric Observatory for Infrared Astronomy (SOFIA) is a 2.5m infrared telescope built into a Boeing 747 SP. In 2014 SOFIA reached its Full Operational Capability milestone and nowadays takes off about three times a week to observe the infrared sky from …

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Central Flash Analysis of the 29 June 2015 Occultation

A. S. Bosh, Amanda A. Sickafoose, C. A. Zuluaga, S. E. Levine et autres

Hardware-in-the-loop environment for verification of a small satellite's on-board software

Michael Fritz, Sebastian Winter, Juergen Freund, Stefan Pflueger et autres

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A correlation between ionization energies and critical temperatures in superconducting A3C60 fullerides

Florian Hetfleisch, M. Stepper, Hans─Peter Roeser, A. Bohr et autres

Buckminster A3C60 fullerides (A = alkali metal) are usually superconductors with critical temperatures Tc in the range 2.5–40 K. Although they are very similar in size, structure and many other aspects, the effect of the alkali atoms on Tc has generally been …

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SSETO—Small Satellite for Exoplanetary Transit Observation

Johannes Mathies, Steffen Mauceri, Lukas Pfeiffer, Marco Vietze et autres

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THz radiation in the tapered LiNbO3 ribbon waveguide

Anahit S. Nikoghosyan, Hans─Peter Roeser, R. М. Мartirosyan, John Martyn Chamberlain et autres

We present our results on THz pulse generation in the 0.1-2.5 THz band via optical rectification of femtosecond laser pulses in a tapered crystal. A simulation study for visualization of THz wave propagation in the crystal has been performed. It is shown …

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THE 2011 JUNE 23 STELLAR OCCULTATION BY PLUTO: AIRBORNE AND GROUND OBSERVATIONS

Michael J. Person, Edward W. Dunham, A. S. Bosh, S. E. Levine et autres

On 2011 June 23, stellar occultations by both Pluto (this work) and Charon (future analysis) were observed from numerous ground stations as well as the Stratospheric Observatory for Infrared Astronomy (SOFIA). This first airborne occultation observation since 1995 with the Kuiper Airborne …

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HYPERSPECTRAL REMOTE SENSING WITH THE UAS "STUTTGARTER ADLER" – CHALLENGES, EXPERIENCES AND FIRST RESULTS

Andreas Buettner, Hans─Peter Roeser

Abstract. The UAS "Stuttgarter Adler" was designed as a flexible and cost-effective remote-sensing platform for acquisition of high quality environmental data. Different missions for precision agriculture applications and BRDF-research have been successfully performed with a multispectral camera system and a spectrometer as …

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Active damping of the SOFIA Telescope assembly

Paul J. Keas, Edward W. Dunham, Ulrich Lampater, Enrico Pfüller et autres

The NASA/DLR Stratospheric Observatory for Infrared Astronomy (SOFIA) employs a 2.5-meter reflector telescope in a Boeing 747SP. The telescope is housed in an open cavity and is subjected to aeroacoustic and inertial disturbances in flight. To meet pointing requirements, SOFIA must achieve …

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Upgrade of the SOFIA target acquisition and tracking cameras

Manuel Wiedemann, Jürgen Wolf, Hans─Peter Roeser

The Stratospheric Observatory for Infrared Astronomy (SOFIA) uses three CCD cameras with different optics for target acquisition and tracking. The Wide Field Imager (WFI with 68 mm optics) and the Fine Field Imager (FFI with 254 mm optics) are mounted on the …

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The Earth micro- and submicro-particle environment

R. Srama, E. Gruen, H. Kruêger, René Laufer et autres