Documents / Official release
This NASA file of astronaut scientific debriefing papers from 1962 collects internal Office of Space Sciences material on the science observations made on early Mercury flights. A February 1962 memo from Maurice Dubin asks for more detail on John Glenn's report of luminous particles and the atmospheric horizon layer. A draft memo concludes that the particles were tied to the spacecraft and were not extraterrestrial. The file also holds a Los Alamos letter that attributes the high haze layer to nitrogen peroxide, and notes on Carpenter's airglow observations.
From the source:Release of 2026-06-12 This file contains memoranda, correspondence, reports, and other materials relating to contemporary scientific interest in investigating the nature of luminous phenomena reported by astronauts John Glenn and Walter Schirra during spaceflight. This collection includes transcripts from NASA interviews and debriefings with both astronauts regarding those observations. It also contains details relating to scientific observations of atmospheric phenomena, including brief descriptions of luminous particles, experiences while aboard spacecraft, and circa 1955 theoretical analysis of meteoric particles entering the atmosphere. Pages 34-35, 55-56, 57-63, 64-113, and 122-127 feature content relevant to the PURSUE initiative.
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package i n a vacuum. The possibility that it might represent small partic les from the fiberglass i nsulator was also considered; in view of the smallness of the fibers, it appears l :lkely that they would have been blown away at once, l Lke the Mylar confetti. The dynamic pressure of 1 dyne m2 is sufficient to L\I'" \\, ••''\ 2remove at once~weighing less than about 10 to 100 milligrams cm ; which corresponds to a thickness of the order of 0. 3 to 1 mi llimeter for most ordinary substances. As menti oned in the MA-6 report, there are two plausible sources withi n the capsule for these parti cles. (1) Snow formed by condensation of steam from the life-support system. (2) Small particles of dust, waste, bits of i nsulation and other sweepings. The latter are very consp i cuous in a zero g environment, when there l s nothing to keep them down; it is found to be extraordinarily difficult to free the i nterior of the capsule of such material. Undoubtedly, the exteri or parts of the capsule which are exposed to the environment will contain these things, and they undoubtedly play a part i n the Glenn effect. In particular , a corkscrew shaped piece observed by Carpenter was probably a t urning or perhaps a raveled piece of insulation. On the other hand, there is considerable evidence which points to snow as the source of the majority of the material. In the first place, water is dumped out of the capsule i n far larger quantities t han any other substance. In the second place, the material looked like snowflakes both t o Glenn and to Carpenter. In the third place, the fre ~uency with whi ch the Glenn effe ct i s reported by Carpenter appears to be correlated with the temperature of the exterior of the capsule as recorded by thermocouples in the shi ngles. The temperature was always lowest at night, falling to temperatures of -35°C just
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Official release, from the pursue collection. The PDF is mirrored here; the original link is above. 216 pages are in the text index: search them above, or from the library's search.