SH036-0029
Calibrating optical distortions in the Solar Orbiter SPICE spectrograph
Monday, 14 December 2020
Poster
William T Thompson1, Udo Schühle2, Peter R Young3, F Auchere4, Mats Carlsson5, Andrzej Fludra6, Don Hassler7, Hardi Peter8, Regina Aznar Cuadrado2, Eric Buchlin4, Martin Caldwell6, Craig DeForest7, Terje Fredvik5, Louise K Harra9, Miho Janvier4, Therese Ann Kucera3, Alessandra S Giunta6, Tim Grundy6, Daniel Müller10, Susanna Parenti11, Stéphane Caminade4, Werner K Schmutz9, Luca Teriaca2, David Williams12 and Sunil Sidher6, (1)ADNET Systems Inc. Greenbelt, NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)Max Planck Institute for Solar System Research, Göttingen, Germany, (3)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (4)Université Paris-Saclay, CNRS, Institut d'Astrophysique Spatiale, Orsay, France, (5)University of Oslo, Institute of Theoretical Astrophysics, Oslo, Norway, (6)RAL Space, STFC Rutherford Appleton Laboratory, Didcot, United Kingdom, (7)Southwest Research Institute, Boulder, CO, United States, (8)Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany, (9)Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, Davos Dorf, Switzerland, (10)European Space Agency, ESTEC, Noordwijk, Netherlands, (11)Institut d'Astrophysique de Paris, Paris, France, (12)European Space Agency, ESAC, Villanueva De La Cañada, Madrid, Spain
Abstract:
The Spectral Imaging of the Coronal Environment (SPICE) instrument on Solar Orbiter is a high-resolution imaging spectrometer operating at extreme ultraviolet (EUV) wavelengths from 70.4-79.0 nm and 97.3-104.9 nm. A single-mirror off-axis paraboloid focuses the solar image onto the entrance slit of the spectrometer section. A Toroidal Variable Line Space (TVLS) grating images the entrance slit onto a pair of MCP-intensified APS detectors. Ray-tracing analysis prior to launch showed that the instrument was subject to a number of small image distortions which need to be corrected in the final data product. We compare the ray tracing results with measurements made in flight. Co-alignment with other telescopes on Solar Orbiter will also be examined.
