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

Alouette Synoptic (Alosyn) Scaled Data


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1962-09-29 to 1967-06-30


This data set, prepared at the Communications Research Centre in Ottawa, Canada, consists of Alouette 1 synoptic data (Alosyn) on 7-track, one-file, magnetic tapes in two forms. Some are 556-bpi, even-parity, BCD magnetic tapes produced on an IBM 7094 computer and the remaining tapes are 800-bpi, odd-parity, EBCDIC produced on an IBM 360 computer. The Alosyn data are tabulations of selected ionospheric parameters which were read (scaled) from the ionogram and, in some cases, also calculated from other scaled values. Four parameters are presented chronologically: (1) plasma frequency at the satellite, (2) plasma frequency at the F2 maximum, (3) maximum frequency of observed sporadic E, and (4) strength of ground echoes. Supporting information includes for the spacecraft position: Greenwich and local mean time, location, magnetic dip, solar zenith angle, Kp, and quality and accuracy notations for some of the scalings. These data are also available on 35-mm microfilm as data set 62-049A-01B and on microfiche as data set 62-049A-01K.

Data are available online at

Alternate Names

  • Alosyn-Scaled Data


  • Space Physics: Ionospheric Studies


  • 62-049A-01C

Additional Information



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



NameRoleOriginal AffiliationE-mail
Dr. Glen E.K. LockwoodData ProviderDepartment of Communications/Communications Research Centre
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight
Mrs. Elizabeth D. HewensGeneral ContactDepartment of Communications/Communications Research Centre
[] NASA Logo -