106 lines
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5.2 KiB
XML
106 lines
No EOL
5.2 KiB
XML
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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<!--
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This_software_was_developed_and_/_or_modified_by_Raytheon_Company,
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pursuant_to_Contract_DG133W-05-CQ-1067_with_the_US_Government.
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U.S._EXPORT_CONTROLLED_TECHNICAL_DATA
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This_software_product_contains_export-restricted_data_whose
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export/transfer/disclosure_is_restricted_by_U.S._law._Dissemination
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to_non-U.S._persons_whether_in_the_United_States_or_abroad_requires
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an_export_license_or_other_authorization.
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Contractor_Name:________Raytheon_Company
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Contractor_Address:_____6825_Pine_Street,_Suite_340
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________________________Mail_Stop_B8
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________________________Omaha,_NE_68106
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________________________402.291.0100
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See_the_AWIPS_II_Master_Rights_File_("Master_Rights_File.pdf")_for
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further_licensing_information.
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-->
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<!--
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This is an incremental override file, indicating that the files
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at different localization levels will be combined.
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-->
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<!-- TOWRdocs Header
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VIIRS Imagery Style Rules.
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-->
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<!-- TOWRdocs Description
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This file updates the VIIRS imagery default colormap for the near constant contrast (NCC) product,
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which generates "pseudo-albedo" values that vary throughout the lunar cycle. The baseline default
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color table (ZA (Vis Default).cmap) has a linearly varying grayscale palette with black specified
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at the top of the scale for highest albedo values where values are otherwise white. AWIPS 2 scales
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NCC from 0 to 1.6 by default. Many clouds are moderately bright while areas where there should be
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bright city lights are black. These "black" lights have values > 1.6 and are a result of the
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default color table. This color table may also be produced starting from the default color
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table (ZA (Vis Default) by doing the following:
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Using the color table editor, change the Colormap size to the maximum 2048 colors. Stretch the values
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between 0 and 1 by making the top arrow point to the minimum value (0.0), then set the red, green, and
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blue bars to 0 (black). Set the bottom arrow to a value of 1, and the red, green, and blue values to
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255 (white). Click "interpolate." Finally, set all the values between 1.0-1.6 white.
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At full moon, the city lights have their lowest values and occupy the smallest horizontal area, while the
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clouds are their brightest. Stretching the NCC values from 0 to ~1.2 may work well. As the moonlight
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decreases, city lights gain larger values and expand horizontally, and the clouds become darker. For
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these lower light conditions, stretching from 0 to ~0.7 may best enhance the clouds. This color table
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is a stretch between 0 and 1.0 and represents a good starting point for any portion of the lunar cycle. We
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recommend starting with this, then adjusting the the top value in order to best enhance the feature of interest (usually clouds).
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Note that several days surrounding a new moon will have little to no signal from clouds.
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For more details, see the CIRA VIIRS NCC Quick Guide for Imagery Enhancements in AWIPS 2. See also the VIIRS JITT training
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link at https://vlab.ncep.noaa.gov/group/goes-r-end-user-mission-readiness-project/jitt_viirs_dnbncc
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Contributor: Dan Lindsey
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-->
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<!-- TOWRdocs Status
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Modification of the AWIPS 2 baseline VIIRS imagery style rules to point to an updated colormap for NCC imagery.
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-->
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<!-- TOWRdocs POC
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Lee Byerle
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-->
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<styleRuleset>
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<!-- Default BT Satellite Rule -->
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<styleRule>
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<viirsDataMatches>
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<parameter>BT</parameter>
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</viirsDataMatches>
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<imageStyle>
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<displayUnits>C</displayUnits>
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<colorMapUnits>IRPixel</colorMapUnits>
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<range scale="LINEAR">
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<minValue>55</minValue>
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<maxValue>-109</maxValue>
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</range>
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<defaultColormap>Sat/IR/CIRA (IR Default)</defaultColormap>
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<colorbarLabeling>
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<values>40 20 0 -20 -40 -60 -80</values>
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</colorbarLabeling>
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</imageStyle>
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</styleRule>
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<!-- Default Ref Satellite Rule for NCC -->
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<styleRule>
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<viirsDataMatches>
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<parameter>Ref</parameter>
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</viirsDataMatches>
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<imageStyle>
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<range scale="LINEAR">
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<minValue>0</minValue>
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<maxValue>1.6</maxValue>
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</range>
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<!-- <defaultColormap>NPP/VIIRS/ZA (Vis Default)</defaultColormap> -->
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<defaultColormap>NPP/VIIRS/NCC_zero_to_one</defaultColormap>
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</imageStyle>
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</styleRule>
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<!-- Special Ref 1.378u Satellite Rule based on sample data -->
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<styleRule>
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<viirsDataMatches>
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<parameter>Ref</parameter>
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<wavelength>1.378</wavelength>
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</viirsDataMatches>
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<imageStyle>
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<range scale="LINEAR">
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<minValue>0</minValue>
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<maxValue>0.6</maxValue>
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</range>
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<defaultColormap>NPP/VIIRS/CA (Low Light Vis)</defaultColormap>
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</imageStyle>
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</styleRule>
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</styleRuleset> |