NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Listings of Data Acquisition Times on Microfilm


Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Time span: 1967-07-30 to 1969-01-25


The data set, generated at NSSDC from a computer printout supplied by the principal investigator, is a listing of data acquisition times on one reel of 16-mm microfilm. Data for each entry of varying time period include calendar date, day count of year, orbit number, universal start and stop times, format number, bit rate, type of particles (electrons or protons), start and stop values of the McIlwain L-shell parameter, hemisphere, pass direction, availability of various plots (summary, analysis, or polar), and availability of printout of the data. Owing to the inclusion of a 13-min timer on the high-voltage power supply that powered the experiment detectors, data acquisition was not continuous. Acquisition was initiated via ground command usually as the satellite approached the auroral zone. Thirteen minutes were nominally sufficient time for the satellite to traverse the auroral one, pass over the polar cap, and again cross the auroral zone before the detector power was turned off. At other times, the high voltage was commanded off by ground command. Data acquisition for the experiment was complicated by orbital operations requirements of the spacecraft, especially pertaining to spacecraft attitude control and onboard tape recorder use.

Alternate Names

  • Data Acquisition Times, Mfilm


  • Space Physics: Magnetospheric Studies


  • 67-073A-11E

Additional Information



Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
[] NASA Logo -