Pointing and Alignment of the CDS Grazing Incidence Spectrometer on SOHO

Details Pointing and Alignment of the CDS Grazing Incidence Spectrometer on SOHO Pointing and Alignment of the CDS Grazing Incidence Spectrometer on SOHO

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cdssw..57.....k&link_type=abstract

SoHo CDS Software Note, No. 57

Computer Science

Soho, Cds, Pointing, Alignment, Sun, Euv

Scientific paper

The pointing of the Grazing Incidence Spectrometer (GIS) on the SOHO CDS instrument has been determined by study of the limb data, and has been compared to the pointing of the Normal Incidence Spectrometer (NIS), The results show that the size of the solar image seen by both instruments is the same, but since the SOHO attitude loss incident in June 1998 the GIS observes the sun at a different position, shifted 20.2 arcsec to the south, for zero roll angle, compared to the NIS. No evidence for a distortion of the rastered image of the sun in GIS data was found.

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