NSSDCA ID: 1969-053A-01
Mission Name: IMP-GIn this experiment, a four-element solid-state telescope with an acceptance cone half angle of 20 deg was mounted normal to the spacecraft spin axis. During each 2.73-min interval, 9.82-s accumulations were obtained in each of 16 distinct counting modes. These modes involved protons in ten energy intervals covering 0.5 to 20 MeV, alpha particles in six intervals covering 4 to 70 MeV, and electrons, deuterons, tritons, and helium-3 nuclei in the intervals 0.3 to 3, 5 to 20, 5.5 to 25, and 11 to 72 MeV, respectively. Onboard calibration checks were performed every 6 h. The experiment performed normally until January 30, 1970, when a GSFC power supply failure limited the useful data gathered to protons between 0.5 and 5 MeV, alpha particles between 4 and 18 MeV, and electrons between 0.3 and 3 MeV. No further experiment degradation occurred until the spacecraft decayed from orbit on December 23, 1972. This instrument was essentially the same as that flown by the Bell Lab group on Explorer 34, and is described further in J. Geophys. Res., v. 74, p. 2851, 1969, by Lanzerotti and the references contained therein.
Mass: 1.77 kg
Power (avg): 2 W
Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Louis J. Lanzerotti | General Contact | AT&T Bell Laboratories | louis.j.lanzerotti@njit.edu |
Dr. Charles S. Roberts | Other Investigator | AT&T Bell Laboratories | |
Mr. G. L. Miller | Other Investigator | AT&T Bell Laboratories | |
Dr. Walter L. Brown | Principal Investigator | AT&T Bell Laboratories |