SPIRIT

Technical description

• Ritchey-Chretien telescope for 171, 195, 284, 304Å bands (multilayer optics is analogous to the SOHO EIT telescope). FOV 42', angular scale 2,4"/pix.
• Herschel telescope-coronagraph for 175, 304Å bands with off-axis paraboloids with Mo-Si coating. FOW 45', angular scale 2,6"/pix. In the coronagraphic mode the instant FOV 45' at 2-5 R_Sun.
• two optical sensors to control pointing to the Sun by stars.

• FeXXV full Sun bragg crystal spectroheliograph ( l = 1,85 - 1,87Å). Angular scale 1'/pix, spectral resolution 1,5·10^-4Å.
• two MgXII full Sun bragg crystal spectroheliographs ( l = 8,418 - 8,423Å) with orthogonal dispersion planes. FOV 1,3°, angular scale 4,1"/pix, spectral resolution 3·10^-3Å.
• two XUV diffraction grating slitless spectroheliographs, each gives full Sun spectral images in two selectable spectral bands 177 - 207Å and 285 - 335Å. Angular scale 6"x1'/pix, spectral resolution 3·10^-2Å/pix.