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 "serviceDescription": "<div style='text-align:Left;'><p><span style='font-weight:bold;'>Summary:<\/span><\/p><p><span>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 created maps of surface water extent impacted by the flooding caused by Atmospheric Rivers in the Pacific Northwest starting on December 8, 2025 using the OPERA Dynamic Surface Water Extent from Sentinel-1 (DSWx-S1). <\/span><\/p><p><span>The results posted here are preliminary and unvalidated results, primarily intended to aid the field response and provide a rough first look at the inundation extent. The ARIA-share website has always focused on posting preliminary results as fast as possible for disaster response. All information is provisional for use under emergency response guidelines. These data are provided with absolutely no warranty of any kind.  Use at your own risk.<\/span><\/p><p><span style='font-style:italic;'>OPERA DSWx-S1<\/span><\/p><p><span>The OPERA DSWx-S1 was used to identify surface water for the flooding event. The images provided are a mosaic of OPERA DSWx-S1 products, producing a composite image for each date. The mosaicking applied prioritized pixels classified as open surface water and inundated vegetation to preserve water pixels in regions of product granule overlap. The images are provided as GeoTIFF files. <\/span><\/p><p><span>Water (WTR) Layer Description: Masked interpreted water classification layer. This represents pixel-wise classification into one of three water classes (not water, open water and inundated vegetation), masks (HAND mask and layover/shadow mask), or no data classes.<\/span><\/p><p><span style='font-style:italic;'>Water (WTR) Layer Values:<\/span><\/p><ul><li>0: Not Water - an area with valid data that is not open water (class 1), inundated vegetation (class 3), height above nearest drainage masked (class 250), or layover/shadow masked (class 251). Masking can result in &quot;not water&quot; (class 0) where land cover masking is applied (suggested color: #ffffff)<\/li><li>1: Open Water - an area that is entirely water and unobstructed to the sensor, including obstructions by vegetation, terrain, and buildings. (suggested color: #0000ff)<\/li><li>3: Inundated vegetation - an area that is considered inundated, extracted from the high value in dual polarization ratio and the wetland class in land cover map. (suggested color: #00ff00)<\/li><li>250: Height Above Nearest Drainage (HAND) masked - an area where topographic height is higher than the HAND threshold (suggested color: #c8c8c8)<\/li><li>251: Layover/shadow masked - an area identified as layover or shadow computed from the geometry of the digital elevation model and sensor. The area is directly copied from input burst RTC-S1 products (suggested color: #808080)<\/li><li>255: No data (suggested color: transparent)<\/li><\/ul><div><div>Water Gain Description: Water gain classification layer. This represents pixel-wise classification into water gain and no change/water loss, as well as no data classes.<\/div><div><br /><\/div><div><i>Water Gain Layer Values:<\/i><\/div><div><ul><li>0: No Change or Water Loss- an area that had no change (e.g., open water in both images) or water loss (e.g., open water to not water). Masked pixels from HAND and Layover/Shadow are set to No data. (suggested color: #ffffff)<\/li><li>1: Water Gain - an area that gained water in the most recent image. This includes change from Not Water to Inundated Vegetation, Not Water to Open Water, and Inundated Vegetation to Open Water. (suggested color: #ff15e4)<\/li><\/ul><\/div><\/div><p><span style='font-weight:bold;'>Satellite/Sensor:<\/span><\/p><p><span>Synthetic Aperture Radar (SAR) instrument on European Space Agency's (ESA) Sentinel-1A/C satellite.<\/span><\/p><p><span style='font-weight:bold;'>Resolution:<\/span><\/p><p><span>30 meters<\/span><\/p><p><span style='font-style:italic;'>OPERA DSWx-S1 data availability<\/span><\/p><p><span>The post-processed products are available to download at https://aria-share.jpl.nasa.gov/20251210-PacificNorthwest-AtmRiver/DSWx-S1//. The OPERA DSWx-S1 products have been in production since September 2024, are freely distributed to the public via NASA's Physical Oceanography Distributed Active Archive Center (PO.DAAC), and can be downloaded through NASA's Earthdata search. For more information about the Dynamic Surface Water eXtent product suite, please refer to the DSWx Product page: <\/span><a href='https://www.jpl.nasa.gov/go/opera/products/dswx-product-suite' target='_blank'>https://www.jpl.nasa.gov/go/opera/products/dswx-product-suite<\/a><span>. <\/span><\/p><p><span>For more information about the Caltech-JPL ARIA project, visit <\/span><a href='https://aria.jpl.nasa.gov' target='_blank'>https://aria.jpl.nasa.gov<\/a><span>. <\/span><\/p><p><span>For more information about the JPL OPERA project, visit <\/span><a href='https://www.jpl.nasa.gov/go/opera/' target='_blank'>https://www.jpl.nasa.gov/go/opera/<\/a><span>.  <\/span><\/p><p><span style='font-weight:bold;'>Product POCs:<\/span><\/p><p><span>Cole Speed (cole.speed@jpl.nasa.gov)<\/span><\/p><p><span>Mary Grace Bato (bato@jpl.nasa.gov)<\/span><\/p><p><span>Ines Fenni (ines.fenni@jpl.nasa.gov)<\/span><\/p><p><span>Emre Havazli (emre.havazli@jpl.nasa.gov)<\/span><\/p><p><span>Alexander Handwerger (alexander.handwerger@jpl.nasa.gov)<\/span><\/p><p><b>WMS Endpoint:<\/b><\/p><p><a href='https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_202512_FLOOD_WA/OPERA_DSWxS1/MapServer/WMSServer' target='_blank'>https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_202512_FLOOD_WA/OPERA_DSWxS1/MapServer/WMSServer<\/a><\/p><p><b>Data Download:<\/b><\/p><p><a href='https://aria-share.jpl.nasa.gov/20251210-PacificNorthwest-AtmRiver/DSWx-S1/' target='_blank'>https://aria-share.jpl.nasa.gov/20251210-PacificNorthwest-AtmRiver/DSWx-S1/<\/a><\/p><p><span style='font-weight:bold;'>Credits:<\/span><\/p><p><span>Sentinel-1 data were accessed through the Copernicus Open Hub and the Alaska Satellite Facility server. The product contains modified Copernicus Sentinel data (2025), processed by the European Space Agency and analyzed by the NASA-JPL/Caltech ARIA and OPERA team.  The products are produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group, and managed by NASA's Jet Propulsion Laboratory.<\/span><\/p><p><span>NASA JPL-Caltech ARIA/OPERA Team<\/span><\/p><p><span>==================<\/span><\/p><p>Image acquisition times in UTC (local): <\/p><p><\/p><ul><li>2025-12-15 2:00AM (local Pacific Time: 2025-12-14 6:00PM), <\/li><li>2025-12-14 2:00PM (local Pacific Time: 2025-12-14 6:00AM), <\/li><li>2025-12-11 2:00AM (local Pacific Time: 2025-12-10 6:00PM), <\/li><li>2025-12-10 2:00AM (local Pacific Time: 2025-12-09 6:00PM), <\/li><li>2025-12-07 2:00PM (local Pacific Time: 2025-12-07 6:00AM), <\/li><li>2025-12-05 2:00AM (local Pacific Time: 2025-12-04 6:00PM),  <\/li><li>2025-12-02 2:00PM (local Pacific Time: 2025-12-02 6:00AM), <\/li><li>2025-11-29 2:00AM (local Pacific Time: 2025-11-28 6:00PM),  <\/li><li>2025-11-28 2:00AM (local Pacific Time: 2025-11-27 6:00PM) <\/li><\/ul><p><\/p><p><\/p><p><span><\/span><\/p><p>Last Update 11 Dec. 2025<\/p><\/div>",
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The images provided are a mosaic of OPERA DSWx-S1 products, producing a composite image for each date. The mosaicking applied prioritized pixels classified as open surface water and inundated vegetation to preserve water pixels in regions of product granule overlap. The images are provided as GeoTIFF files. Water (WTR) Layer Description: Masked interpreted water classification layer. This represents pixel-wise classification into one of three water classes (not water, open water and inundated vegetation), masks (HAND mask and layover/shadow mask), or no data classes.Water (WTR) Layer Values:0: Not Water - an area with valid data that is not open water (class 1), inundated vegetation (class 3), height above nearest drainage masked (class 250), or layover/shadow masked (class 251). Masking can result in &quot;not water&quot; (class 0) where land cover masking is applied (suggested color: #ffffff)1: Open Water - an area that is entirely water and unobstructed to the sensor, including obstructions by vegetation, terrain, and buildings. (suggested color: #0000ff)3: Inundated vegetation - an area that is considered inundated, extracted from the high value in dual polarization ratio and the wetland class in land cover map. (suggested color: #00ff00)250: Height Above Nearest Drainage (HAND) masked - an area where topographic height is higher than the HAND threshold (suggested color: #c8c8c8)251: Layover/shadow masked - an area identified as layover or shadow computed from the geometry of the digital elevation model and sensor. The area is directly copied from input burst RTC-S1 products (suggested color: #808080)255: No data (suggested color: transparent)Water Gain Description: Water gain classification layer. This represents pixel-wise classification into water gain and no change/water loss, as well as no data classes.Water Gain Layer Values:0: No Change or Water Loss- an area that had no change (e.g., open water in both images) or water loss (e.g., open water to not water). Masked pixels from HAND and Layover/Shadow are set to No data. (suggested color: #ffffff)1: Water Gain - an area that gained water in the most recent image. This includes change from Not Water to Inundated Vegetation, Not Water to Open Water, and Inundated Vegetation to Open Water. (suggested color: #ff15e4)Satellite/Sensor:Synthetic Aperture Radar (SAR) instrument on European Space Agency's (ESA) Sentinel-1A/C satellite.Resolution:30 metersOPERA DSWx-S1 data availabilityThe post-processed products are available to download at https://aria-share.jpl.nasa.gov/20251210-PacificNorthwest-AtmRiver/DSWx-S1//. The OPERA DSWx-S1 products have been in production since September 2024, are freely distributed to the public via NASA's Physical Oceanography Distributed Active Archive Center (PO.DAAC), and can be downloaded through NASA's Earthdata search. For more information about the Dynamic Surface Water eXtent product suite, please refer to the DSWx Product page: https://www.jpl.nasa.gov/go/opera/products/dswx-product-suite. For more information about the Caltech-JPL ARIA project, visit https://aria.jpl.nasa.gov. For more information about the JPL OPERA project, visit https://www.jpl.nasa.gov/go/opera/.  Product POCs:Cole Speed (cole.speed@jpl.nasa.gov)Mary Grace Bato (bato@jpl.nasa.gov)Ines Fenni (ines.fenni@jpl.nasa.gov)Emre Havazli (emre.havazli@jpl.nasa.gov)Alexander Handwerger (alexander.handwerger@jpl.nasa.gov)WMS Endpoint:https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_202512_FLOOD_WA/OPERA_DSWxS1/MapServer/WMSServerData Download:https://aria-share.jpl.nasa.gov/20251210-PacificNorthwest-AtmRiver/DSWx-S1/Credits:Sentinel-1 data were accessed through the Copernicus Open Hub and the Alaska Satellite Facility server. The product contains modified Copernicus Sentinel data (2025), processed by the European Space Agency and analyzed by the NASA-JPL/Caltech ARIA and OPERA team.  The products are produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group, and managed by NASA's Jet Propulsion Laboratory.NASA JPL-Caltech ARIA/OPERA Team==================Image acquisition times in UTC (local): 2025-12-15 2:00AM (local Pacific Time: 2025-12-14 6:00PM), 2025-12-14 2:00PM (local Pacific Time: 2025-12-14 6:00AM), 2025-12-11 2:00AM (local Pacific Time: 2025-12-10 6:00PM), 2025-12-10 2:00AM (local Pacific Time: 2025-12-09 6:00PM), 2025-12-07 2:00PM (local Pacific Time: 2025-12-07 6:00AM), 2025-12-05 2:00AM (local Pacific Time: 2025-12-04 6:00PM),  2025-12-02 2:00PM (local Pacific Time: 2025-12-02 6:00AM), 2025-11-29 2:00AM (local Pacific Time: 2025-11-28 6:00PM),  2025-11-28 2:00AM (local Pacific Time: 2025-11-27 6:00PM) Last Update 11 Dec. 2025",
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  "Title": "DSWx-S1",
  "Author": "",
  "Comments": "Summary: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 created maps of surface water extent impacted by the flooding caused by Atmospheric Rivers in the Pacific Northwest starting on December 8, 2025 using the OPERA Dynamic Surface Water Extent from Sentinel-1 (DSWx-S1). The results posted here are preliminary and unvalidated results, primarily intended to aid the field response and provide a rough first look at the inundation extent. The ARIA-share website has always focused on posting preliminary results as fast as possible for disaster response. All information is provisional for use under emergency response guidelines. These data are provided with absolutely no warranty of any kind.  Use at your own risk.OPERA DSWx-S1The OPERA DSWx-S1 was used to identify surface water for the flooding event. The images provided are a mosaic of OPERA DSWx-S1 products, producing a composite image for each date. The mosaicking applied prioritized pixels classified as open surface water and inundated vegetation to preserve water pixels in regions of product granule overlap. The images are provided as GeoTIFF files. Water (WTR) Layer Description: Masked interpreted water classification layer. This represents pixel-wise classification into one of three water classes (not water, open water and inundated vegetation), masks (HAND mask and layover/shadow mask), or no data classes.Water (WTR) Layer Values:0: Not Water - an area with valid data that is not open water (class 1), inundated vegetation (class 3), height above nearest drainage masked (class 250), or layover/shadow masked (class 251). Masking can result in \"not water\" (class 0) where land cover masking is applied (suggested color: #ffffff)1: Open Water - an area that is entirely water and unobstructed to the sensor, including obstructions by vegetation, terrain, and buildings. (suggested color: #0000ff)3: Inundated vegetation - an area that is considered inundated, extracted from the high value in dual polarization ratio and the wetland class in land cover map. (suggested color: #00ff00)250: Height Above Nearest Drainage (HAND) masked - an area where topographic height is higher than the HAND threshold (suggested color: #c8c8c8)251: Layover/shadow masked - an area identified as layover or shadow computed from the geometry of the digital elevation model and sensor. The area is directly copied from input burst RTC-S1 products (suggested color: #808080)255: No data (suggested color: transparent)Satellite/Sensor:Synthetic Aperture Radar (SAR) instrument on European Space Agency's (ESA) Sentinel-1A/C satellite.Resolution:30 metersOPERA DSWx-S1 data availabilityThe post-processed products are available to download at https://aria-share.jpl.nasa.gov/20251210-PacificNorthwest-AtmRiver/DSWx-S1//. The OPERA DSWx-S1 products have been in production since September 2024, are freely distributed to the public via NASA's Physical Oceanography Distributed Active Archive Center (PO.DAAC), and can be downloaded through NASA's Earthdata search. For more information about the Dynamic Surface Water eXtent product suite, please refer to the DSWx Product page: https://www.jpl.nasa.gov/go/opera/products/dswx-product-suite. For more information about the Caltech-JPL ARIA project, visit https://aria.jpl.nasa.gov. For more information about the JPL OPERA project, visit https://www.jpl.nasa.gov/go/opera/.  Product POCs:Cole Speed (cole.speed@jpl.nasa.gov)Mary Grace Bato (bato@jpl.nasa.gov)Ines Fenni (ines.fenni@jpl.nasa.gov)Emre Havazli (emre.havazli@jpl.nasa.gov)Alexander Handwerger (alexander.handwerger@jpl.nasa.gov)Credits:Sentinel-1 data were accessed through the Copernicus Open Hub and the Alaska Satellite Facility server. The product contains modified Copernicus Sentinel data (2025), processed by the European Space Agency and analyzed by the NASA-JPL/Caltech ARIA and OPERA team.  The products are produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group, and managed by NASA's Jet Propulsion Laboratory.NASA JPL-Caltech ARIA/OPERA Team==================Last Update 10 Dec. 2025",
  "Subject": "OPERA Dynamic Surface Water eXtent from Sentinel-1 (DSWx-S1) for the Washington Atmospheric River December 2025.",
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