NSSDCA ID: SPIO-00058
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1967-12-01 to 1972-01-02
This data set consists of several different statistical treatments of Total Electron Content (TEC) values. The data are contained in documents titled "Ionospheric Electron Content for 1971," which are unnumbered and published by Stanford University. The original values were recorded every 5 min (288 observations per day) on ATS 3. These were values of the Faraday rotation of the 137.35 (or 136.47) MHz telemetry carrier. The magnetic field effect for the entire column is taken to be that at 400 km, which for data reduction purposes is assumed to be at the altitude of maximum electron content (and Faraday rotation). This point of intersection of 400 km and the propagation path is called the ionospheric point, and the values have been converted to the TEC contained in a vertical column through this point. There are 4 sets of tables that contain TEC related values including (1) daily maximum and minimum values (tabulations), (2) TEC change rates and standard deviations for two 2-hr periods near dawn (predawn and morning) and dusk (tabulations), (3) 6-hr averages around noon and midnight (tabulations), (4) smoothed 30-min values (tabulations and graphs), (5) 7-day running means at 15-min intervals, (6) daily averages of TEC, (7) 7-day running means of daily averages, (8) standard deviations, daily and for eight 3-hr periods each day, (9) ratio of 3 hourly standard deviations to 3-hr mean values, and (10) ratio of daily standard deviations to daily mean value (disturbance index). The data were observed from Rosman, North Carolina, Stanford, California, and Urbana, Illinois. The Rosman subionospheric point was always near 32.3 deg N and 81 (+ or - 2) deg W. The Stanford subionospheric point remained near 34 deg N and 109 (+ or - 8) deg W. The Urbana data (IP near 40 deg N, 88 deg W), containing no summary data (i.e., only "4" above), were published by Flaherty, U. of Illinois.
Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Aldo V. Darosa | Data Provider | Stanford University | darosa@ee.stanford.edu |
Dr. Aldo V. Darosa | General Contact | Stanford University | darosa@ee.stanford.edu |