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A drawing of the larger chamber, including the position of simulated solar sources.
RCA Service Company to design and build two vacuum chambers at MSC. The facility was used in astronaut training and spacecraft environmental testing. using carbon arc: lamps, the chambers simulated the sun's intensity, permitting observation of the effects of solar heating encountered on a lunar mission. At the end of July, MSC awarded RCA another contract (worth $3,341,750) for these solar simulators.
> The Apollo Spacecraft - A Chronology. Vol. II. Part 1 (1963 1st quarter)