12/15/2023 0 Comments Sun reflection on waterWe post-process a global climate model of an Earth-like planet to simulate reflected light curves. One proposed signature of oceans is specular reflection ('glint'), which increases the apparent albedo of a planet at crescent phases. Identifying liquid water on the surface of planets is a high priority, as this traditionally defines habitability. This tool enables the user to determine if the surface at the solution latitude and longitude is in fact reflective, thus identifying the sensor response as a true glint or an event requiring further = latitude-longitude, monthly mean and an rms error of 15%. We then describe a tool that, using the WGS84 spheroidal Earth model, finds the latitude and longitude on Earth where a reflection of this type could be produced, given input Sun and satellite coordinates. Here we describe methods for identifying glints based on the physical processes involved in their production, including spectral fitting and polarization measurements. These glints are important background signals to be able to identify with confidence, particularly in the context of analyzing data from satellites monitoring for transient surface or atmospheric events. This phenomenon, involving liquid or ice surfaces, can result in the brief, intense illumination of satellite sensors appearing from the satellite perspective to be of terrestrial origin. Among the background signals commonly seen by Earth-monitoring satellites is the specular reflection of sunlight off of Earth's surface, commonly referred to as a glint.
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