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The ARIA-share website has always focused on posting preliminary results as fast as possible for disaster response.<\/SPAN><\/P><P><SPAN STYLE=\"font-style:italic;\">OPERA DIST-ALERT-HLS<\/SPAN><\/P><P><SPAN>The Disturbance product (DIST) maps per pixel vegetation disturbance (specifically, vegetation cover loss) from the Harmonized Landsat Sentinel-2 (HLS) scenes. We provide the vegetation disturbance status (VEG-DIST-STATUS) and the maximum vegetation anomaly value (VEG-ANOM-MAX) layers. Images are provided from October 2, 2024. Each image consists of multiple MGRS tiles that were merged together for a composite image saved as a GeoTIFF file.<\/SPAN><\/P><P><SPAN STYLE=\"font-style:italic;\">VEG-ANOM-MAX<\/SPAN><\/P><P><SPAN>Difference between historical and current year observed vegetation cover at the date of maximum decrease (vegetation loss of 0-100%). This layer can be used to threshold vegetation disturbance per a given sensitivity (e.g. disturbance of &gt;20% vegetation cover loss). The sum of the historical percent vegetation and the anomaly value will be the vegetation cover estimate for the current year.<\/SPAN><\/P><P><SPAN STYLE=\"font-style:italic;\">GEN-ANOM-MAX<\/SPAN><\/P><P><SPAN>Maximum spectral distance between a current year HLS scene reflectance and the composite reflectance of previous calendar years. Generic disturbance, as determined from the variations of the reflectance through the HLS scenes, is intended to delineate generic changes outside of the vegetation cover loss theme. <\/SPAN><\/P><P><SPAN>The DIST-ALERT HLS products have these flags:<\/SPAN><\/P><P><SPAN>For VEG-ANOM-MAX layers, 255 represents No Data and is based on the Fmask layer of the source HLS granule. For the GEN-ANOM-MAX layer, -1 represents \"No Data\" and is based on the Fmask layer of the source HLS granule.<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Suggested Use:<\/SPAN><\/P><P><SPAN STYLE=\"font-style:italic;\">VEG-ANOM-MAX<\/SPAN><\/P><UL><LI><P><SPAN>0 (White) - 100 (Red): Maximum loss of percent vegetation<\/SPAN><\/P><\/LI><LI><P><SPAN>255: No data<\/SPAN><\/P><\/LI><\/UL><P><SPAN STYLE=\"font-style:italic;\">GEN-ANOM-MAX<\/SPAN><\/P><UL><LI><P><SPAN>0 (White) - Variable (Blue): Maximum spectral distance compared to composite reflectance of previous calendar years <\/SPAN><\/P><\/LI><LI><P><SPAN>-1: No Data <\/SPAN><\/P><\/LI><\/UL><P><SPAN STYLE=\"font-weight:bold;\">Satellite/Sensor:<\/SPAN><\/P><P><SPAN>MultiSpectral Instrument (MSI) on European Space Agency's (ESA) Copernicus Sentinel-2A/B satellites and Operational Land Imager 2 (OLI-2) on NASA's Landsat 9 satellite.<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Resolution:<\/SPAN><\/P><P><SPAN>30 meters<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Credits:<\/SPAN><\/P><P><SPAN>NASA JPL-Caltech ARIA/OPERA Team<\/SPAN><\/P><P><SPAN>The product contains modified Copernicus Sentinel data (2024) and is produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group. Managed by NASAâ\u20ac™s Jet Propulsion Laboratory, OPERA funds and manages the DIST-ALERT-HLS product developed and produced by the Global Land Analysis and Discovery (GLAD) laboratory at the University of Maryland.<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">Additional Information:<\/SPAN><\/P><P><SPAN STYLE=\"font-style:italic;\">OPERA DIST-ALERT-HLS data availability<\/SPAN><\/P><P><SPAN>The post-processed products are available to download at <\/SPAN><A href=\"https://aria-share.jpl.nasa.gov/20241010-Hurricane_Milton/DIST/\" STYLE=\"text-decoration:underline;\"><SPAN>https://aria-share.jpl.nasa.gov/20241010-Hurricane_Milton/DIST/<\/SPAN><\/A><\/P><P><SPAN>The OPERA DIST-HLS products have been in production since January 2022, are freely distributed to the public via NASA's Land Processes Distributed Active Archive Center (LP DAAC), and can be downloaded through NASA's Earthdata search. For more information about the Surface Disturbance product suite, please refer to the DIST Product page: <\/SPAN><A href=\"https://www.jpl.nasa.gov/go/opera/products/dist-product-suite/\" STYLE=\"text-decoration:underline;\"><SPAN>https://www.jpl.nasa.gov/go/opera/products/dist-product-suite/<\/SPAN><\/A><\/P><P><SPAN>For more information about the Caltech-JPL ARIA project, visit <\/SPAN><A href=\"https://aria.jpl.nasa.gov/\" STYLE=\"text-decoration:underline;\"><SPAN>https://aria.jpl.nasa.gov<\/SPAN><\/A><\/P><P><SPAN>For more information about the JPL OPERA project, visit <\/SPAN><A href=\"https://www.jpl.nasa.gov/go/opera/\" STYLE=\"text-decoration:underline;\"><SPAN>https://www.jpl.nasa.gov/go/opera/<\/SPAN><\/A><\/P><P><SPAN STYLE=\"font-weight:bold;\">Data Download:<\/SPAN><\/P><P><SPAN /><A href=\"https://aria-share.jpl.nasa.gov/20241010-Hurricane_Milton/DIST/\" STYLE=\"text-decoration:underline;\"><SPAN>https://aria-share.jpl.nasa.gov/20241010-Hurricane_Milton/DIST/<\/SPAN><\/A><\/P><P><SPAN STYLE=\"font-weight:bold;\">Esri REST Endpoint:<\/SPAN><\/P><P><SPAN>See URL section on right side of page<\/SPAN><\/P><P><SPAN STYLE=\"font-weight:bold;\">WMS Endpoint:<\/SPAN><\/P><P><SPAN /><\/P><\/DIV><\/DIV><\/DIV>",
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  "Comments": "Date of Images:10/11/2024, 10/12/2024Summary:The Advanced Rapid Imaging and Analysis (ARIA) and Observational Products for End-Users from Remote Sensing Analysis (OPERA) teams at NASA's Jet Propulsion Laboratory and California Institute of Technology derived the disturbance maps using the OPERA Disturbance Alert from Harmonized Landsat Sentinel-2 (DIST-ALERT-HLS) products. The results posted here are preliminary and unvalidated results, primarily intended to aid the field response and people who want to have a rough first look at the surface disturbance extent. The ARIA-share website has always focused on posting preliminary results as fast as possible for disaster response.OPERA DIST-ALERT-HLSThe Disturbance product (DIST) maps per pixel vegetation disturbance (specifically, vegetation cover loss) from the Harmonized Landsat Sentinel-2 (HLS) scenes. We provide the vegetation disturbance status (VEG-DIST-STATUS) and the maximum vegetation anomaly value (VEG-ANOM-MAX) layers. Images are provided from October 2, 2024. Each image consists of multiple MGRS tiles that were merged together for a composite image saved as a GeoTIFF file.VEG-ANOM-MAXDifference between historical and current year observed vegetation cover at the date of maximum decrease (vegetation loss of 0-100%). This layer can be used to threshold vegetation disturbance per a given sensitivity (e.g. disturbance of &gt;20% vegetation cover loss). The sum of the historical percent vegetation and the anomaly value will be the vegetation cover estimate for the current year.GEN-ANOM-MAXMaximum spectral distance between a current year HLS scene reflectance and the composite reflectance of previous calendar years. Generic disturbance, as determined from the variations of the reflectance through the HLS scenes, is intended to delineate generic changes outside of the vegetation cover loss theme. The DIST-ALERT HLS products have these flags:For VEG-ANOM-MAX layers, 255 represents No Data and is based on the Fmask layer of the source HLS granule. For the GEN-ANOM-MAX layer, -1 represents \"No Data\" and is based on the Fmask layer of the source HLS granule.Suggested Use:VEG-ANOM-MAX0 (White) - 100 (Red): Maximum loss of percent vegetation255: No dataGEN-ANOM-MAX0 (White) - Variable (Blue): Maximum spectral distance compared to composite reflectance of previous calendar years -1: No Data Satellite/Sensor:MultiSpectral Instrument (MSI) on European Space Agency's (ESA) Copernicus Sentinel-2A/B satellites and Operational Land Imager 2 (OLI-2) on NASA's Landsat 9 satellite.Resolution:30 metersCredits:NASA JPL-Caltech ARIA/OPERA TeamThe product contains modified Copernicus Sentinel data (2024) and is produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group. Managed by NASAâ\u20ac™s Jet Propulsion Laboratory, OPERA funds and manages the DIST-ALERT-HLS product developed and produced by the Global Land Analysis and Discovery (GLAD) laboratory at the University of Maryland.Additional Information:OPERA DIST-ALERT-HLS data availabilityThe post-processed products are available to download at https://aria-share.jpl.nasa.gov/20241010-Hurricane_Milton/DIST/The OPERA DIST-HLS products have been in production since January 2022, are freely distributed to the public via NASA's Land Processes Distributed Active Archive Center (LP DAAC), and can be downloaded through NASA's Earthdata search. For more information about the Surface Disturbance product suite, please refer to the DIST Product page: https://www.jpl.nasa.gov/go/opera/products/dist-product-suite/For more information about the Caltech-JPL ARIA project, visit https://aria.jpl.nasa.govFor more information about the JPL OPERA project, visit https://www.jpl.nasa.gov/go/opera/Data Download:https://aria-share.jpl.nasa.gov/20241010-Hurricane_Milton/DIST/Esri REST Endpoint:See URL section on right side of pageWMS Endpoint:",
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