{
 "culture": "en-US",
 "name": "Coherence_Median__",
 "guid": "",
 "catalogPath": "",
 "snippet": "A 100m resolution Sentinel-1 mosaic of 12-day median radar coherence for Summer 2019 (June\u2013August). Sensitive to surface changes such as dune activity, vegetation, and construction, with low coherence values highlighting dynamic sandy areas.",
 "description": "<div style='text-align:Left;'><p><span>This dataset provides a 100m resolution mosaic of Sentinel-1 12-day median coherence for the summer season (June\u2013August) of 2019. It was generated from all 12-day image pairs acquired over the study area during this period. Radar coherence is sensitive to changes in surface conditions, including dune migration, vegetation growth, and urban construction. In the mosaic, areas with low coherence (e.g., active dunes) appear darker, while stable surfaces appear brighter. The median coherence provides a robust measure of cumulative surface dynamics across the summer season. The dataset is valuable for investigating dune movement, sand deposition patterns, seasonal landscape variability, and the broader impacts of climate change on desertification processes. Source data are available via the ASF Global Seasonal Sentinel-1 Interferometric Coherence and Backscatter Dataset: https://asf.alaska.edu/datasets/derived/global-seasonal-sentinel-1-interferometric-coherence-and-backscatter-dataset/<\/span><\/p><p><span>A higher-resolution (15m) version of this product, based on Sentinel-1 data from Summer 2021, is also available (see Section 6.6).<\/span><\/p><\/div>",
 "summary": "A 100m resolution Sentinel-1 mosaic of 12-day median radar coherence for Summer 2019 (June\u2013August). Sensitive to surface changes such as dune activity, vegetation, and construction, with low coherence values highlighting dynamic sandy areas.",
 "title": "Coherence_Median__",
 "tags": [
  "Sentinel-1",
  "SAR",
  "Coherence",
  "Radar",
  "Interferometry",
  "Dune Migration",
  "Desertification",
  "Vegetation",
  "Construction",
  "Surface Change",
  "Copernicus",
  "ESA",
  "ASF",
  "Remote Sensing",
  "12-Day Repeat",
  "Summer 2019",
  "100m Resolution"
 ],
 "type": "Image Service",
 "typeKeywords": [
  "ArcGIS Server",
  "Data",
  "Image Service",
  "Service"
 ],
 "thumbnail": "",
 "url": "https://www.esrs.wmich.edu/arcgis",
 "minScale": 5.91657527591555E8,
 "maxScale": 288895.277144,
 "spatialReference": "WGS_1984_Web_Mercator_Auxiliary_Sphere",
 "accessInformation": "",
 "licenseInfo": "",
 "portalUrl": ""
}