NSSDCA ID: SPHE-00678
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1977-10-26 to 1978-09-20
This data set consists of experimenter-supplied spectrograms on microfilm. Each grey-scale frame contains eight horizontal panels and includes both ion and electron data obtained during a 6-h period. The top four panels display ion energy/charge spectra averaged over longitude for the quadrants centered on the spacecraft noon, dusk, midnight, and dawn meridians, respectively. The fifth panel from the top displays the ion angular distribution summed over all energies. The sixth panel shows electron energy/charge spectra averaged over all longitudes, and the seventh and eighth panels display electron angular distributions summed over all energy/charge values greater than 100 eV and 10 eV, respectively. Intensity of the spectra and angular distributions is proportional to the measured count rate corrected for detector efficiency. Because the distribution function, f, is proportional to upsilon to the -4 power, where upsilon is the particle speed, this method of data presentation helps emphasize phenomena occurring at the higher energies. Time runs from left to right, the hour in UT being indicated beneath the bottom panel. Also on each frame are 1) a calibration wedge, 2) spacecraft number, 3) date, 4) orbit number, and 5) alternating sequences of orbital information. The first, third, and fifth sequences of item 5 each give the radial distance in Re, the solar ecliptic latitude and longitude, and the solar magnetospheric latitude and longitude. The second, fourth, and sixth sequences provide the X, Y, and Z values in solar ecliptic and solar magnetospheric coordinates, respectively. The numbers at the right-hand edge of each panel refer to either the log of the energy/charge or the look angle of the measurement, as appropriate.
Questions and comments about this data collection can be directed to: Dr. H. Kent Hills
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. John T. Gosling | General Contact | Los Alamos National Laboratory | jgosling@lanl.gov |