NSSDCA ID: 1975-057A-01
Mission Name: OSO 8This University of Colorado experiment measured solar ultraviolet lines between 1050 and 2300 A and their variation with time and position on the disk. Spectroheliograms were also generated at selected wavelengths. The instrument consisted of an extended-focal-length Cassegrain telescope, an Ebert monochromator, and a small computer. The telescope focused sunlight on the entrance slit (variable from 1- by 5-arc-s to 1-arc-s by 15-arc-min) of the monochromator. The 3600 lines/mm grating in the monochromator was used in second order. The grating drive mechanism was capable of being programmed to scan: (1) the entire spectrum, (2) selected portions of the spectrum, or (3) selected single wavelengths. Two photomultiplier tubes, one covering the range from 1400 to 2300 A and the other covering wavelengths less than 1400 A, detected the radiation. The small computer controlled the experiment and allowed flexible observing programs through automated, data-dependent observing sequences. For more information, see E. C. Bruner et al., Ap. J., v. 210, p. L97, 1976.
Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Elmo C. Bruner, Jr. | Other Investigator | Lockheed Palo Alto | |
Dr. R. Grant Athay | Other Investigator | High Altitude Observatory | athay@ncar.ucar.edu |
Dr. Charles A. Barth | Principal Investigator | University of Colorado | charles.barth@colorado.edu |