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Reduced Electron and Proton Data


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1963-05-07 to 1964-04-05


This reduced data set from the BTL experiment, generated with the BESYS monitor at Bell Telephone Laboratories, is on 800-bpi, 7-track, IBM 7094, odd-parity magnetic tapes. Each file on these tapes contains a BCD header record. The rest of the tape is binary. The logical record length is 54 (36-bit) words. Each record contains ephemeris and time information, model magnetic field, McIlwain L, and satellite state data such as skin temperature, detector temperature, etc. Also presented are (1) count rates from the electron detector in each bias mode, with interpolated values of B, L, and gammma (where gamma is the angle between the spacecraft spin axis and model field direction), and (2) count rates from the two proton detectors in each bias mode with corresponding values of B, L, and gamma. The data are time ordered.

Data are available online at

Alternate Names

  • Protn+Elec Count Rt+Ephm,Besys


  • Space Physics: Magnetospheric Studies


  • 63-013A-01A

Additional Information



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



NameRoleOriginal AffiliationE-mail
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight
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