Documents / Official release
This NASA file from 1965 combines Mission Operation Report M-913-65-04 on the Gemini 4 (GT-4) flight with related correspondence. Memoranda from the Associate Administrator for Manned Space Flight describe the planned four-day mission with James McDivitt and Edward White, including a spacewalk, a rendezvous with the booster second stage and thirteen experiments. Later letters and telegrams from NASA's Manned Space Science office concern the astronaut debriefing and requests for GT-4 photography and film for scientific analysis.
From the source: Release of 2026-06-12 Incident: June 3-7, 1965, Low Earth Orbit. Gemini IV was the second crewed mission of the Gemini series. Astronauts James McDivitt and Edward White successfully completed the four-day flight between June 3 and June 7, 1965. The mission included the first American spacewalk. This collection of documents contains a transcription of the astronauts recounting their observations of bright particles outside the spacecraft, dated circa June 25, 1967, on pages 78-81, and page 101.
6. M-4, In-Flight Phonocardiogram The purpose of this experiment is to measure the fatigue-stage of an astronaut's heart muscle during a long-duration flight. A microphone wi ll be applied to an astronaut's chest wal I at the cardiac apex. Heart sounds detected during the flight will be recorded on an on board biomedical recorder. The sound trace wi 11 be compared to the waveform obtained from a simultaneous infl ight electro cardiogram to determine the time interval between electrical activation of the heart muscle and the onset of ventricular systrole. Figure 8 illustrates the method of installation of the phono cardiogram transducer. 7. M-6, Bone Demineralization The purpose of this experiment is to establish the occurrence and degree of bone demi nera Ii zati on resulting from prolonged weightlessness during spaceflight. Spec ia I X-rays wi 11 be ta ken of an astronaut's heel bone and the terminal bone of the fifth digit of the right hand. Three pre flight and three postflight exposures wi 11 be taken of these two bones and compared to determine if any bone deminerali zation has occurred due to the space flight. Figure 9 i 11 ustrates the laboratory procedure which will be used for this experiment. M-913-65-04 M-4 IN-FLIGHT PHONOCARDIOGRAM PROTOTYPE PHONOCARDIOGRAM TRANSDUCER AND SIGNAL CONDITIONER FIG . 8 GEMINI EXPERIMENT NO. M·& BONE DEMINERALIZATION ESTABLISH DEGREE PURPOSE OF BONE DETERIORATION EQUIPMENT STANDARD X-RAY WEIGHT N/ A VOLUME N/ A PRE AND POST PROCEDURE FLIGHT x-RAY LOCATION N/ A i " ' MG4-1886 FIG. 9 5/24/65 Page 7
Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 224 pages are in the text index: search them above, or from the library's search.