Technical Report: The Mathematics of Orbital Solar Reflectors
Technical Report: The Mathematics of Orbital Solar Reflectors I. Executive Summary At the time of their original submission to the FCC for launch approval, Reflect Orbital claimed they would be able to deliver illuminances up to 5x that of a full moon (1.6 lux). A...
Botanical Light Pollution
Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 2016/02/17 Blue-rich light from LED streetlights, we are told, is the nemesis of professional and amateur astronomers. Blue light is preferentially scattered by the atmosphere,...
Blue Light Hazards and Television
Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 2017/05/19 If you have grandchildren, you may be old enough to remember “black and white” (that is, monochrome) televisions sets with rabbit ear antennae and some of...
Blue Light Hazard… Or Not?
Ian Ashdown, P. Eng., FIES, Senior Scientist, SunTracker Technologies Ltd. Published: 2014/11/05 As a professional lighting designer, you will likely have read about the “blue light hazard” associated with white light-emitting diodes. You will have seen...
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