NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Corona White Light

NSSDCA ID: 1965-007A-03

Mission Name: OSO 2
Principal Investigator:Dr. Richard Tousey


The instrumentation for this experiment, located in the solar-oriented 'sail' section of the satellite, operated in a pointed mode and a raster mode. The pointed mode measured the intensity of the white light corona by means of an externally occulted white light lyot coronagraph, which was aimed to within plus or minus 1 arc-min of the center of the apparent solar disk. The coronal light was detected on an end window-like photomultiplier. Data were obtained, with a 1 arc-min resolution, from which the corona can be reproduced between r/r sub s=3.5 and 7-- There was too much stray light for r/r sub s values between 7 and 10 for any useful data reduction. The raster mode, designated as the EUV spectroheliograph, scanned over a 40 arc-min by 40 arc-min area only when the coronagraph was turned off and the raster scan 'execute' command was transmitted to the pointed section of the satellite. The scan, which included the entire solar disk and part of its corona, formed images of the sun in hydrogen Lyman-Alpha (1216 A), he II (304 A), and a region near 584 A. The resolution of these images was 1 arc-min. Data were received from February 1965 to November 1965 and were of good quality.

Alternate Names

  • OSO2/CoronaWhiteLight


  • Solar Physics: Visible

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. Richard TouseyPrincipal InvestigatorUS Naval Research Laboratory
[] NASA Logo -