NSSDCA ID: XXNO-00151
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1981-09-01 to 1983-02-28
This data set consists of project-supplied orbit plots on microfiche. The microfiche displays DE-A (DE 1) and DE-B (DE 2) orbit tracks in universal time vs dipole invariant latitude for each day. The day number of the DE "Systematic Operations Plan" is given at the top for reference. The spacecraft locations are shown as dots at 1-min intervals. DE-B had approximately 15 orbits per day and DE-A had about 3.5 orbits per day. The location of perigee is denoted by the symbol "P". To aid in identifying magnetically coincident operations of the two satellites, horizontal bars are attached to those sections of the orbit for which telemetry data were available. The longitude of the ascending node and the north-bound equatorial crossing, is listed along the bottom of each plot, to allow the user to estimate the longitude of each track segment. The plots are arranged so that the longitude shifts 180 degrees at the pole to allow the orbits to be displayed without a discontinuity at that point. Thus, the ascending-node longitude applies only to the northbound half of the orbit, i.e., when the latitude varies from -90 to +90 deg.
Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Robert A. Hoffman | General Contact | NASA Goddard Space Flight Center | rhoffman@pop600.gsfc.nasa.gov |