Paper
18 December 2000 Calibration and flight of the NRL EIT CalRoc
Jeffrey S. Newmark, J. Daniel Moses, John W. Cook, Jean-Pierre Delaboudiniere, Xueyan Song, Charles Carabetian, Marie Bougnet, Jacqueline Brunaud, Jean-Marc Defise, Frederic Clette, Jean-Francois E. Hochedez
Author Affiliations +
Abstract
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, J. Daniel Moses, John W. Cook, Jean-Pierre Delaboudiniere, Xueyan Song, Charles Carabetian, Marie Bougnet, Jacqueline Brunaud, Jean-Marc Defise, Frederic Clette, and 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); https://doi.org/10.1117/12.410532
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KEYWORDS
Calibration

Extreme ultraviolet

Mirrors

Electroluminescent displays

Charge-coupled devices

Sensors

Multilayers

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