| Institution: | (1) Inst. d'Astrophysique Spatiale, Université Paris XI, 91405 Orsay Cedex, France;(2) Naval Research Laboratory, 20375 Washington, DC, USA;(3) Centre Spatial de Liège, Liège, Belgium;(4) Institut d'Optique Théorique et Appliquée, 91403 Orsay, France;(5) Lockheed Palo Alto Research Laboratory, 94304 Palo Alto, CA, USA;(6) NASA/Goddard Space Flight Center, Greenbelt, MD, USA;(7) Laboratoire d'Astronomie Spatiale, Marseille, France;(8) Observatoire Royal de Belgique, Brussels, Belgium;(9) Present address: SEL/NOAH, 325 Broadway, 80303 Boulder, CO |
| Abstract: | The Extreme-ultraviolet Imaging Telescope (EIT) will provide wide-field images of the corona and transition region on the solar disc and up to 1.5 R above the solar limb. Its normal incidence multilayer-coated optics will select spectral emission lines from Fe IX (171  ), Fe XII (195 ), Fe XV (284 ), and He II (304 ) to provide sensitive temperature diagnostics in the range from 6 × 104 K to 3 × 106 K. The telescope has a 45 x 45 arcmin field of view and 2.6 arcsec pixels which will provide approximately 5-arcsec spatial resolution. The EIT will probe the coronal plasma on a global scale, as well as the underlying cooler and turbulent atmosphere, providing the basis for comparative analyses with observations from both the ground and other SOHO instruments. This paper presents details of the EIT instrumentation, its performance and operating modes. |
