Summary of Gemini Extravehicular Activity

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Scientific and Technical Information Division, Office of Technology Utilization, National Aeronautics and Space Administration, 1967 - Extravehicular activity (Manned space flight)
 

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Page 10-2 - The only tether capability that was demonstrated was for use as a distance-limiting device. The requirements for body restraints were established, and the capabilities of foot restraints and waist tethers were demonstrated in considerable detail. The validity of underwater simulation in solving body restraint problems and in assessing workloads was demonstrated in flight and further confirmed by postflight evaluation.
Page 3-25 - As indicated by the time line in figure 11-19, the ultraviolet stellar and the synoptic terrain photography experiments were accomplished on a routine basis. During the standup activity, the pilot performed sev-eral tasks designed for familiarization with the environment and for comparison of the standup and umbilical extravehicular activities. These tasks included mounting the extravehicular sequence camera and installing an extravehicular handrail from the cabin to the docking adapter on the target...
Page 10-1 - The character of practical tasks was shown, and some of the factors that limit task complexity and diffi-culty were identified. Several methods were demonstrated for crew transfer between two space vehicles and include: (1) surface transit while docked, (2) free-floating transit between two undocked vehicles in close proximity, (3) self-propul-sion between two undocked vehicles, and (4) tether or umbilical pull-in from one undocked vehicle to another. All of these methods were accomplished within...
Page 3-19 - ... 100foot tether between the spacecraft and the target vehicle, and to provide a more extensive evaluation of the Hand Held Maneuvering Unit. In addition, several experiments, including ultraviolet photography, were scheduled for standup extravehicular ac-tivity. The umbilical extravehicular activity was scheduled for the morning of the second day so that the spacecraft/target-vehicle tether evaluation could be accomplished later in that same day.
Page 6-10 - ... the command pilot and shows the extravehicular pilot in the perfect posture for maneuvering with a Hand Held Maneuvering Unit. The pilot described his experiences with the Hand Held Maneuvering Unit and with the umbilical as follows: I left [the spacecraft] entirely under the influ-ence of the gun, and it carried me right straight out, a little higher than I wanted to go. I wanted to maneuver over to your [command pilot's] side, but I maneuvered out of the spacecraft and forward and perhaps a...
Page 3-25 - TDA enabled the pilot to rest easily, to work without great effort, and to connect the spacecraft/target vehicle tether in an expeditious manner. The pilot activated the Experiment S010 Agena Micrometeorite Collection package on the target vehicle for possible future retrieval. Before the end of the first daylight period, the pilot moved to the spacecraft adapter section where he evaluated...
Page 6-12 - I translated over by pushing off from the spacecraft. I floated forward and upward fairly slowly and contacted the Agena. I grabbed hold of the docking cone as near as I can recall, at about the 2 o'clock position. If you call the location of the notch in it, the 12 o'clock, I was to the right of that — at about the 2 o'clock position and I started crawling around. No, I must have been more about the 4 o'clock position, because I started crawling around at the docking cone counterclockwise, and...
Page 10-3 - ... encumbrance to the crews. This design was selected because of space limitations within the spacecraft, and the crews were continually hampered by the bulk of the chest-mounted system. The use of gaseous oxygen as the coolant medium in the spacesuit and Extravehicular Life Support System was a limiting factor in the rejection of metabolic heat and in pilot comfort. The use of a gaseous system required the evaporation of perspiration as a cooling mechanism. At high workloads, heavy perspiration...
Page 3-26 - Finally, perhaps the most significant result was that the underwater simulation duplicated the actual extravehicular actions and reactions with a high degree of fidelity. It was concluded that any task which could be accomplished readily in underwater simulation would have a high probability of success during the actual EVA.
Page 3-25 - ... extrave-hicular activity was scheduled prior to the umbilical activity. The planned extravehicu-lar activity time line was intentionally interspersed with 2-minute rest periods. Pro-cedures were also established for monitoring the heart rate and respiration rate of the extravehicular pilot; the crew were to be advised of any indications of a high rate of exertion before the condition became serious. Finally, the pilot was trained to operate at a moderate work rate, and flight and ground personnel...

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