NSSDCA ID: ASGA-00015
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1972-11-20 to 1973-06-03
Each frame of this data set consists of a plot of the tracks of the electron pair arising from a single gamma-ray event as the two electrons passed through the spark chamber grid system. On the left side of the frame are given the year, month, day, hour, second, and millisecond of the event. In the spark chamber, there are 32 modules, each consisting of two planes (X and Y) of 200 parallel, evenly spaced wires. The two planes are separated by 3.6 mm, and the directions of the wires in the two planes are orthogonal. The 32 modules are stacked vertically into two 16-module units. The two upper sections of the plot show the path of the electron pair as it crossed the 200 wires of each X-plane (1-200 on the horizontal axis) in the 32-module vertical array (0-31 on the vertical axis). The two lower sections of the plot show the same thing for the Y-planes. The vertical axis has been compressed by a factor of 2.7 relative to the horizontal axis. In all, there are over 3 million gamma-ray events depicted in this set. For further information on the main data base and this data set, contact Dr. Carl Fichtel, NASA-GSFC, Code 660, Greenbelt, MD 20771.
Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. David J. Thompson | Data Provider | NASA Goddard Space Flight Center | djt@sage0.gsfc.nasa.gov |
Dr. Carl E. Fichtel | General Contact | NASA Goddard Space Flight Center | fichtel@lheavx.gsfc.nasa.gov |