Lighting constraints on lunar surface operations

Details Lighting constraints on lunar surface operations Lighting constraints on lunar surface operations

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stin...9123014e&link_type=abstract

Unknown

Physics

Extravehicular Activity, Illuminating, Lunar Luminescence, Lunar Surface, Shadows, Night, Phase Shift, Position (Location), Rotation, Terrestrial Radiation

Scientific paper

An investigation into the levels of ambient lighting on the lunar surface indicates that for most nearside locations, illumination will be adequate throughout most of the lunar night to conduct EVAs with only minor artificial illumination. The maximum lighting available during the lunar night from Earthshine will be similar to the light level on a July evening at approximately 8:00 pm in the southern United States (approximately 15 minutes after sunset). Because of the captured rotation of the Moon about the Earth, the location of the Earth will remain approximately constant throughout the lunar night, with consequent constant shadow length and angle. Variations in the level of Earthside illumination will be solely a function of Earth phase angle. Experience during the Apollo Program suggests that EVA activities during the period around the lunar noon may be difficult due to lack of surface definition caused by elimination of shadows.

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