edu.ucar.opensky::articles:17178 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T13:41:31.991568 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d72f7pqk The Wave-Front Correction system for the Sunrise balloon-borne solar observatory 2010-12-10T00:00:00Z publication https://n2t.org/ark:/85065/d72f7pqk https://doi.org/10.1007/s11207-010-9676-3 Berkefeld, T. author Schmidt, W. author Soltau, D. author Bell, A. author Doerr, H. author Feger, B. author Friedlein, R. author Gerber, K. author Heidecke, F. author Kentischer, T. author Luehe, O. author Sigwarth, M. author Waelde, E. author Barthol, P. author Deutsch, W. author Gandorfer, A. author Germerott, D. author Grauf, B. author Meller, R. author Alvarez-Herrero, A. author Knölker, Michael author MartInez Pillet, V. author Solanki, S. author Title, A. author UCAR/NCAR - Library publisher This paper describes the wave-front correction system developed for the Sunrise balloon telescope, and provides information about its in-flight performance. For the correction of low-order aberrations, a Correlating Wave-Front Sensor (CWS) was used. It consisted of a six-element Shack-Hartmann wave-front sensor (WFS), a fast tip-tilt mirror for the compensation of image motion, and an active telescope secondary mirror for focus correction. The CWS delivered a stabilized image with a precision of 0.04 arcsec (rms), whenever the coarse pointing was better than 90 arcsec peak-to-peak. The automatic focus adjustment maintained a focus stability of 0.01 waves in the focal plane of the CWS. During the 5.5 day flight, good image quality and stability was achieved during 33 hours, containing 45 sequences that lasted between 10 and 45 minutes. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication An edited version of this paper was published by Springer. Copyright 2010, The Author(s) None eng geoscientificInformation