NSSDCA ID: 1977-102A-14
Mission Name: ISEE 1This experiment was designed to recognize and record the time history of gamma-ray bursts. Two sensors were used: a 4-cm-diameter, CsI scintillator system and a 6-sq-cm, solid-state (Cd Te) array. An intensity increase in either of the sensors could cause a trigger signal to occur, freezing the circulating memory of the immediate past counting-rate history and filling another memory with the counting rates for 1 min following the trigger signal. The time of the trigger signal and its location in the temporal history were also stored in memory. All stored information was then read out at a very low bit rate during the succeeding several hours. Three trigger signals were used based on total counts in 4 ms, 32 ms, and 256 ms. Six memories were used, three before and three after the trigger signal, yielding storage of 1/64, 1/8, and 1 min of data each to provide detailed rise-time information.
Questions and comments about this experiment can be directed to: Dr. H. Kent Hills
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Dieter K. Hovestadt | Other Investigator | Max-Planck-Institut fur Extraterrestrische Physik | |
Dr. Bonnard J. Teegarden | Other Investigator | NASA Goddard Space Flight Center | teegarden@tgrs.gsfc.nasa.gov |
Prof. George Gloeckler | Other Investigator | University of Maryland | gg10@umail.umd.edu |
Dr. Thomas L. Cline | Principal Investigator | NASA Goddard Space Flight Center | cline@apache.gsfc.nasa.gov |