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Robert Godwin's Apollo 11 : the NASA mission reports PDF

By Robert Godwin

ISBN-10: 1896522491

ISBN-13: 9781896522494

ISBN-10: 189652253X

ISBN-13: 9781896522531

ISBN-10: 1896522858

ISBN-13: 9781896522852

Contains the total group of Apollo 11’s own observations upon returning to earth.

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Extra resources for Apollo 11 : the NASA mission reports

Example text

Table 5-111 is a comparison of the latitude, longitude, and altitude between the best-estimated-trajectory state vector at powered descent initiation, that carried onboard, and the preflight-calculated trajectory. The onboard state-vector errors at powered descent initiation resulted from a combination of the following: a. exercise Uncoupled thruster firings during the docked b. Unaccounted for velocity accrued during quent inspection and station-keeping activity c. Descent orbit insertion d. Propogated e.

In general, this method was highly successful in that it maintained a satisfactory spacecraft attitude for very long periods of time and allowed the crew to sleep without fear of either entering gimbal lock or encountering unacceptable thermal conditions. However, a refinement to the procedure in the form of a new computer routine is required to make it foolproof from an operator's viewpoint. ] On several occasions and for several different reasons, an incorrect computer-entry procedure was used, resulting in a slight waste of reaction control propellants.

One explanation involves primary cosmic rays, with energies in the range of billions of electron volts, bombarding an object in outer space. The theory assumes that numerous heavy and high-energy cosmic particles penetrate the command module structure, causing heavy ionization inside the spacecraft. When liberated electrons recombine with ions, photons in the visible portion of the spectrum are emitted. If a sufficient number of photons are emitted, a dark-adapted observer could detect the photons as a small spot or a streak of light.

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Apollo 11 : the NASA mission reports by Robert Godwin


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