NSSDCA ID: ASRA-00001
Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)
Time span: 1971-04-08 to 1973-11-30
This microfilm data set is included as signal strength lines on the ionograms of data set 71-024A-01A. Processing has been carried out at several locations: CRC in Ottawa, Canada; RSRS in Slough, England; NOAA in Boulder, Colorado (between launch and May 1972); and after the fall of 1972, at RRL in Tokyo, Japan and at the Geophysical Observatory in Christchurch, New Zealand. The signal strength is indicated by the automatic gain control level which is plotted vs time (or equivalently vs frequency, as the receiver is a sweep-frequency receiver). The frequency resolution is relatively good, but the flux resolution is very poor due to the restricted plot height. These data are also available, with the flux displayed on an expanded scale, from the principal investigator. Temporal coverage is limited to less than 7 h per day. An index to the ionograms which lists times when the AGC voltage was recovered is available as data set 71-024A-01B.
Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Theodore R. Hartz | General Contact | Department of Communications/Communications Research Centre |