Ralf-Peter Blum

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The Multi Aperture Scintillation Sensor (MASS) has become a widely employed device to measure the altitude distribution of atmospheric turbulence. An empirical study is reported which investigates the dependence of the MASS results on the knowledge of the instrumental parameters. Also the results of a side by side comparison of two MASS instruments are(More)
We reveal the rather complex interplay of contact-induced re-orientation and interfacial electronic structure - in the presence of Fermi-level pinning - at prototypical molecular heterojunctions comprising copper phthalocyanine (H16CuPc) and its perfluorinated analogue (F16CuPc), by employing ultraviolet photoelectron and X-ray absorption spectroscopy. For(More)
One of the main tools used in the TMT site testing campaign is the turbulence profiler MASS. We describe empirical investigations and a side by side comparison of two MASS systems which were performed in order to identify the accuracy of MASS turbulence data and its dependence on the instrument calibration. The accuracy of the total seeing delivered by the(More)
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