Coronagraph observations and analyses of the ultraviolet solar corona

Details Coronagraph observations and analyses of the ultraviolet solar corona Coronagraph observations and analyses of the ultraviolet solar corona

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989sao..rept.....k&link_type=abstract

Semiannual Status Report, 1 Apr. 1987 - 31 Mar. 1989 Smithsonian Astrophysical Observatory, Cambridge, MA.

Astronomy and Astrophysics

Astronomy

Radiation Detectors, Solar Corona, Solar Spectra, Ultraviolet Astronomy, Ultraviolet Spectra, Line Spectra, Lyman Alpha Radiation, Solar Wind

Scientific paper

The major activities on the Spartan Ultraviolet Coronal Spectrometer project include both scientific and experimental/technical efforts. In the scientific area, a detailed analysis of the previously reported Doppler dimming of HI Ly-alpha from the July 1982 rocket flight has determined an outflow velocity at 2 solar radii from sun center to be between 153 and 251 km/s at 67 percent confidence. The technical activities include, several improvements made to the instrument that will result in enhanced scientific performance or in regaining a capability that had deteriorated during the delay time in the launch date. These include testing and characterizing the detector for OVI radiation, characterizing a serrated occulter at UV and visible wavelengths, fabricating and testing telescope mirrors with improved edges, testing and evaluating a new array detector system, modifying the slit mask mechanism and installing a mask in the instrument to block the Ly-alpha resonance line when the electron scattered component is being observed.

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