Terrestrial glint seen from deep space: Oriented ice crystals detected from the Lagrangian point

@article{Marshak2017TerrestrialGS,
  title={Terrestrial glint seen from deep space: Oriented ice crystals detected from the Lagrangian point},
  author={Alexander Marshak and Tam{\'a}s V{\'a}rnai and Alexander B. Kostinski},
  journal={Geophysical Research Letters},
  year={2017},
  volume={44},
  pages={5197 - 5202}
}
The Deep Space Climate Observatory (DSCOVR) spacecraft resides at the first Lagrangian point about one million miles from Earth. A polychromatic imaging camera onboard delivers nearly hourly observations of the entire sunlit face of the Earth. Many images contain unexpected bright flashes of light over both ocean and land. We construct a yearlong time series of flash latitudes, scattering angles, and oxygen absorption to demonstrate conclusively that the flashes over land are specular… 

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