NSSDCA ID: 1969-006A-03
Mission Name: OSO 5This experiment was designed to observe the whole sun and to record the spectral and time-resolved radiation between 1 and 400 A for a variety of conditions. The instruments consisted of three single Bragg spectrometers (covering 1 to 3 A, 3 to 10 A, and 6 to 25 A), a grazing incidence grating spectrometer covering the range 25 to 400 A, and a pair of ion chambers covering the range 0.5 to 8 A. Useful data were taken while the experiment was pointed toward the center of the sun. Useful data were also recorded when the experiment pointed to the center of the sun in a raster scan of 40- by 40-arc-min. The grating spectrometer began losing sensitivity after 2 months of operation (the grating spectrometer sensitivity can be monitored by observing the 304 A line at various times). The proportional counters in the 1 to 3 A and 3 to 10 A crystal spectrometers were good for about 1 year (their condition may be monitored by comparing the flux for a particular line against the overall flux monitored by the ion chambers). The ion chambers showed no signs of deterioration for over 1 year. The 6 to 25 A spectrometer began losing sensitivity after 6 months of operation. Background levels were usually very small compared to useful signals. For additional information, see W. M. Neupert, M. Swartz, and S. O. Kastner, Solar Phy., v. 31, p. 171, 1973.
Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
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Dr. Werner M. Neupert | Principal Investigator | NASA Goddard Space Flight Center | werner.neupert@noaa.gov |