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DRTE Electron Density Values at Lamina Boundaries on Microfiche


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

Time span: 1962-09-30 to 1968-07-28


This data set, provided by the Defence Research Telecommunications Establishment (DRTE) in Ottawa, Canada, consists of 6 volumes of electron density profiles for the ionosphere above the F2 maximum (topside ionosphere). The data are on microfiche. The data set is ordered chronologically, and it includes about 4.E4 profiles. The profiles were computed from digital values of frequency and virtual height that were scaled from ionograms. Profile data consist of electron density and real height values for each point scaled from the ionogram. Each profile occupies about four lines of print, and a cumulative chronological index of all data from all volumes appears in the front of each volume. For interpolated values of electron density at standard increments of real height, see data set 62-049A-01L. Telemetry stations are not identified, but satellite location, time of observation (Greenwich and local mean time), solar zenith angle at the satellite, magnetic dip and gyrofrequency at the satellite, total electron content down to the lowest topside reflection altitude, and other relevant information are listed for each profile. These profiles correspond to about 2% of the 2.E6 Alouette 1 ionograms observed. Data for most latitudes are included, but those data from longitudes near 80 deg W are more numerous than those from other longitudes. This microfiche data set was prepared at NSSDC from DRTE unpublished (undated and unnumbered) internal reports titled "Alouette 1 ionospheric data N(h)." A single copy of these reports is available for use at NSSDC as TRF B06216. On request, individual pages can be copied as required or the microfiche copy can be supplied.

Alternate Names

  • DRTE N(H) Scaled Profiles, Fiche


  • Space Physics: Ionospheric Studies


  • 62-049A-01F

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. George Leroy NelmsData ProviderDefence Research Establishment
Mrs. Elizabeth D. HewensGeneral ContactDepartment of Communications/Communications Research Centre
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