The SOHO Space Satellite: UV instrumentation.
Abstract
The solar and heliospheric observatory, SOHO will be placed into a halo orbit around the L1 sun-earth Lagrangian point in 1995. The authors describe the ultra-violet and EUV instruments designed to study the solar atmosphere from the chromosphere through the corona. The instruments and their basic characteristics are: 1) SUMER - a normal incidence telescope with a normal incidence spherical concave grating for stigmatic imaging to measure line profiles and images in the wavelength range from 500 Å to 1600 Å with a 1.5″resolution; 2) CDS - a grazing incidence telescope with one grazing incidence astigmatic spectrograph and one normal incidence toroidal grating spectrograph to measure line ratios and images in the range from 170 Å to 800 Å with a 2″resolution; 3) EIT - a normal incidence multilayered telescope to produce narrow band pass images in the spectral lines at 171 Å, 195 Å, 284 Å, and 304 Å with a 3″resolution; 4) UVCS - a normal incidence coronagraph with a normal incidence toroidal grating spectrograph to measure line profiles and images of several EUV lines from ≡500 Å to ≡1200 Å with a several arcsecond resolution; and 5) SWAN - a lens with hydrogen absorption cell and interference filter to measure Ly-α profiles in the far corona and heliosphere.
- Publication:
-
X-Ray/EUV Optics for Astronomy, Microscopy, Polarimetry, and Projection Lithography
- Pub Date:
- February 1991
- DOI:
- 10.1117/12.23203
- Bibcode:
- 1991SPIE.1343..310P
- Keywords:
-
- Satellite-Borne Instruments;
- Soho Mission;
- Solar Atmosphere;
- Solar Instruments;
- Ultraviolet Astronomy;
- Grazing Incidence Telescopes;
- Layouts;
- Optical Measuring Instruments;
- Solar Radiation;
- Telescopes;
- Spacecraft Instrumentation