20250929 09422800 1.0 TRUE 150000000 5000 ItemDescription Black Marble Day/Night Band (BRDF-Corrected) for Hurricane Helene, Fall 2024. <div style='text-align:Left;'>Data from October 12th onwards can be found here for Hurricane Milton: <a href='https://maps.disasters.nasa.gov/arcgis/home/item.html?id=93d2cb2403684275af7c47d468a7be5b' target='_blank'>https://maps.disasters.nasa.gov/arcgis/home/item.html?id=93d2cb2403684275af7c47d468a7be5b</a>Date of Image:Pre-Event: August 2024, September 18, 2024 - September 26, 2024Post-Event: September 27, 2024 - October 11, 2024Summary:These Black Marble Day-Night Band (BRDF-Corrected) images were created by the NASA Black Marble Science team. The images corrected for atmospheric, terrain, lunar BRDF, and straylight effects, and directly measures light intensity on the ground in units of nanowatts/(steradian centimeter squared). The images are scaled from 0 - 30, and show the impact of Hurricane Helene on electric grids in the Southeast US. The baseline image is from August 2024, generated from all daily atmospheric and lunar-corrected data from that month, with additional baselines from September 18-25, 2024, and the “after" image from September 27, 2024. There is a layer to display where clouds are present. This comparison between the images is meant as a visual assessment of outage impacts from Francine to aid various partners who are working to deliver emergency aids to local communities. Power outage maps like these help disaster response efforts in the short-term as well as long-term monitoring during the crucial stages of disaster recovery.Suggested Use:NASA's Black Marble Nighttime Light product suite is a state-of-the-art daily global collection of standard products for monitoring nighttime lights (NTL). Utilizing the Visible Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) aboard the Suomi-NPP, NOAA-20, and NOAA-21 satellites.The image is in inferno color scale. Yellow represents presence of more light; dark blue less lights. Grey represents cloud cover.Satellite/Sensor:Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) onboard the Suomi National Polar-orbiting Platform (SNPP), NOAA-20, and NOAA-21SNPP: August 2024 composite, September 18 - 24, 2024, October 1, 2024, October 10, 2024 - October 11, 2024NOAA-20: September 25 - September 30, 2024, October 2, 2024 - October 9, 2024Resolution:500 metersCredits:NASA Black Marble Science teamPlease cite the following two references when using this data:Román MO, Stokes EC, Shrestha R, Wang Z, Schultz L, Carlo EA, Sun Q, Bell J, Molthan A, Kalb V, Ji C. Satellite-based assessment of electricity restoration efforts in Puerto Rico after Hurricane Maria. PloS one. 2019 Jun 28;14(6):e0218883.Román MO, Wang Z, Sun Q, Kalb V, Miller SD, Molthan A, Schultz L, Bell J, Stokes EC, Pandey B, Seto KC. NASA's Black Marble nighttime lights product suite. Remote Sensing of Environment. 2018 Jun 1;210:113-43.Point of Contact:Ranjay ShresthaNASA Goddard Space Flight CenterE-mail: ranjay.m.shrestha@nasa.govAdditional Links:NASA’s Black Marble Product SuiteRomán, M.O. et al. (2019) Satellite-based assessment of electricity restoration efforts in Puerto Rico after Hurricane Maria. PLoS One, 14 (6).Román, M.O. et al. (2018) NASA’s Black Marble nighttime lights product suite. Remote Sensing of Environment. 210, 113–143.Esri REST Endpoint:See URL section on right side of page.WMS Endpoint:<a href='https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_202409_HURRICANE_HELENE/BLACKMARBLE_BRDF/ImageServer/WMSServer' target='_blank'>https://gis.earthdata.nasa.gov/gis05/services/DISASTERS_202409_HURRICANE_HELENE/BLACKMARBLE_BRDF/ImageServer/WMSServer</a>Data Download:<a href='https://maps.disasters.nasa.gov/download/gis_products/event_specific/2024/hurricane_helene_202409/blackmarble/' target='_blank'>https://maps.disasters.nasa.gov/download/gis_products/event_specific/2024/hurricane_helene_202409/blackmarble/</a></div> USRA/NASA Black Marble Science team Black Marble Day/Night Band (BRDF-Corrected) for Hurricane Helene, Fall 2024. Hurricane Hurricane Helene Black Marble NASA NASA Disasters Program Black Marble Day-Night Band VIIRS <div style='text-align:Left;'><div>NASA data and products are freely available to federal, state, public, non-profit and commercial users. This information can be experimental- or research-grade data products and may not be appropriate for operational use. These NASA data products, services, and the Disasters Mapping Portal are intended to aid decision makers and enhance situational awareness, but these data are not guaranteed to be consistently available or routinely updated.</div></div> 20250908