spacecraft clock time

English

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Noun

spacecraft clock time (countable and uncountable, plural spacecraft clock times)

(astronautics) The clocktime displayed by a clock carried on board a spacecraft.
- 1967, Boeing Company, Lunar Orbiter I - Photography, page 83:
  The spacecraft clock time at the moment of exposure was recorded on the spacecraft film with a timing light.
- 1975, United States, National Aeronautics and Space Administration (contributor), NASA Technical Note, page 11:
  The error in the spacecraft clock time is directly proportional to the spacecraft clock period, and this error can be reduced by lowering the period of the spacecraft clock.
- 1978, Computer Sciences Corporation. Attitude Systems Operation, James Richard Wertz (editor), Spacecraft Attitude Determination and Control, page 315:
  For example, if the attached time is invalid but the spacecraft clock reading is valid and a known attached time corresponds to a known spacecraft clock reading, a current attached time may be computed on the basis of the current spacecraft clock time.
- 1984, Hugh H. Kieffer, Planetary Data Workshop Proceedings of a Workshop Held at Goddard Space Flight Center, Greenbelt, Maryland, November 29-December 1, 1983 · Part 1, page 9:
  Spacecraft clock time tags are associated with all data and remain with the data until level 6 where they are converted to UT (Universal Time, previously GMT).
- 1994, Robert D. Culp, Ronald D. Rausch (editors), American Astronautical Society (contributor), Guidance and Control 1994, Proceedings of the Annual Rocky Mountain Guidance and Control Conference Held February 2-6, 1994, Keystone, Colorado, page 420:
  The evaluation of the polynomial expression (AQPC) yield components of the entry attitude vector based on the time difference between the current spacecraft clock time and the predicted time of periapsis.
- 2005, American Astronautical Society, American Institute of Aeronautics and Astronautics (contributors), Spaceflight Mechanics, Proceedings of the AAS/AIAA Spaceflight Mechanics Meeting · Volume 119, Parts 1-3, page 114:
  Correct spacecraft clock time to terrestrial atomic time standard (i.e. UTC or TAI).
- 2021, Stephen D. Wall and Kenneth W. Ledbetter, Design Of Mission Operations Systems For Scientific Remote Sensing, page 168:
  The first file defines a manoeuvre expressed as a set of polynomials with the spacecraft clock time as the only independent variable.
- 2024, Kenneth Roy, Les Johnson (editors), Interstellar Travel - Propulsion, Life Support, Communications, and the Long Journey, page 328:
  which means that 1 second (or hour, day, year) of spacecraft clock time is 1.15 seconds (or hours, days, years) of Earth time.