18 December 2000 Calibration and flight of the NRL EIT CalRoc
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The ability to derive physical parameters of the Sun from observations by the Solar and Heliospheric Observatory (SOHO) Extreme Ultraviolet Imaging Telescope (EIT) greatly increases the scientific return of the mission. The absolute and time variable calibration of EIT therefore is of extreme interest. The NRL EIT Calibration Sounding Rocket (CalRoc) program was initiated to provide well calibrated, contemporaneous observations in support of SOHO EIT. These observations provide three benefits to the SOHO EIT data, absolute calibration points, temporal and spatial information of the EIT EUV response variability in flight via flat field information and clues to the physics of the degradation. Details of the bandpasses of the multilayered optics and the total telescope photometry are presented. Comparisons are shown with the contemporaneous images from SOHO EIT. Plans for the second CalRoc flight are discussed. Loss of reflectivity in the multilayer mirrors has been identified as a new component to the SOHO EIT and CalRoc degradation.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jeffrey S. Newmark, Jeffrey S. Newmark, J. Daniel Moses, J. Daniel Moses, John W. Cook, John W. Cook, Jean-Pierre Delaboudiniere, Jean-Pierre Delaboudiniere, Xueyan Song, Xueyan Song, Charles Carabetian, Charles Carabetian, Marie Bougnet, Marie Bougnet, Jacqueline Brunaud, Jacqueline Brunaud, Jean-Marc Defise, Jean-Marc Defise, Frederic Clette, Frederic Clette, Jean-Francois E. Hochedez, Jean-Francois E. Hochedez, } "Calibration and flight of the NRL EIT CalRoc", Proc. SPIE 4139, Instrumentation for UV/EUV Astronomy and Solar Missions, (18 December 2000); doi: 10.1117/12.410532; https://doi.org/10.1117/12.410532

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