publication . Article . 2017

Terrestrial glint seen from deep space: Oriented ice crystals detected from the Lagrangian point: ORIENTED ICE CRYSTALS SEEN FROM L1 POINT

Alexander Marshak; Tamás Várnai; Tamás Várnai; Alexander B. Kostinski;
Open Access
  • Published: 21 May 2017
Abstract
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 reflections off tiny ice platelets floating in the air nearly horizontally. Such deep space detection of tropospheric ice can be used to constrain the likelihood of oriented crysta...
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Subjects
arXiv: Astrophysics::Earth and Planetary AstrophysicsPhysics::Atmospheric and Oceanic PhysicsPhysics::GeophysicsAstrophysics::Instrumentation and Methods for Astrophysics
free text keywords: Observatory, NASA Deep Space Network, Exoplanet, Astronomy, Starlight, Albedo, Spacecraft, business.industry, business, Physics, Ice crystals, Lagrangian point
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