On identifying the specular reflection of sunlight in earth-monitoring satellite data.

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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. 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. 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. Here we describe methods for identifying glints based on the physical processes involved in their production, including spectral fitting ... continued below

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30 p.

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Nelsen, James M., Jr.; Hohlfelder, Robert James; Jackson, Dale Clayton & Longenbaugh, Randolph S. March 1, 2009.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 44 times , with 4 in the last month . More information about this report can be viewed below.

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Description

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. 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. 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. Here we describe methods for identifying glints based on the physical processes involved in their production, including spectral fitting and polarization measurements. 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. 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 analysis.

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30 p.

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  • Report No.: SAND2008-6705
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/972492 | External Link
  • Office of Scientific & Technical Information Report Number: 972492
  • Archival Resource Key: ark:/67531/metadc927311

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • March 1, 2009

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 30, 2016, 2:08 p.m.

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Nelsen, James M., Jr.; Hohlfelder, Robert James; Jackson, Dale Clayton & Longenbaugh, Randolph S. On identifying the specular reflection of sunlight in earth-monitoring satellite data., report, March 1, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc927311/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.