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Hydrogen-Helium Interplanetary Emission Data


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

Time span: 1973-11-06 to 1974-01-28


This BCD tape was supplied by the experimenter and contains the data used to generate the four data figures in his paper, "The Interstellar Wind: Mariner 10 Measurements of H (1216A) and He (584A) Interplanetary Emission," submitted to The Astrophysical Journal (1977). The tape contains four files, one file for each roll calibration maneuver (RCM). The number of records per file varies but is near 1000. Each record contains the background photoelectron events per 21 s, the number of helium photoelectron events per 21 s, the number of hydrogen photoelectron events per 21 s, right ascension, and declination. One rayleigh of emission yields 0.36 photoelectron events per second for helium (584A) and 0.033 photoelectron event per second for hydrogen (1216A). File 1 contains data for November 6, 1973; file 2 contains data for December 7, 1973; file 3 has data for December 19, 1973; and file 4 has data for January 28, 1974.


  • Astronomy: Ultraviolet
  • Planetary Science: Atmospheres
  • Space Physics: Zodiacal Light/Interplanet Dust


  • 73-085A-05A

Additional Information



Questions or comments about this data collection can be directed to: Dr. David R. Williams.



NameRoleOriginal AffiliationE-mail
Dr. A. Lyle BroadfootGeneral ContactUniversity of Southern
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