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Mercury Third Encounter Photos on 70-mm Black and White Film


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

Time span: 1975-03-12 to 1975-03-17


This data set consists of photography of Mercury obtained at the third and last encounter of Mercury by Mariner 10 when the spacecraft approached within 200 km of the planet's surface. These photographs contain the highest resolution (approx. 100 m) of the three encounters. The photography is good. Beside the picture, of which three versions are given--(a) raw, (b) high pass filter and (c) vertical AGC)--is a data block which gives the following information: MTCF (Mission Test Computer Facility) identifier, mission identifier, day no., hour, minute, second, and milliseconds, FDS (Flight Data System) count, spacecraft data transmission mode, imaging system mode, bit rate, editing mode, first in-synch line/last in-synch line, no. of good lines/no. of bad lines/no. of missing lines, bit error, no. of spikes, camera designation, exposure time, filter position and type, cathode-beam status, camera flooding light status, calibration mode, filter step command, dark current status, housekeeping measurements, process version, filter size, type and input of stretch parameters, translation table, filter transference factor, blemishes removed, radiance contouring, year, month, and day of processing. (See Brief Description of 73-085A-01A for fu11er description.) Below the picture are two gray scales, the left one the full range and the right one the stretched scale. The numbering system is a 9000-series number and is imprinted in bold type between the gray scales. These data are also available in digital tape format from L. Pieri at the RPIF, Building 264, Room 115, Jet Propulsion Laboratory, Pasadena, California.


  • Planetary Science: Atmospheres
  • Planetary Science: Geology and Geophysics


  • 73-085A-01K

Additional Information



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



NameRoleOriginal AffiliationE-mail
Mr. Kenneth P. KlaasenData ProviderNASA Jet Propulsion
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