{
 "schema": "heimdall-observation/1",
 "id": "obs-0004",
 "slug": "ilulissat-icefjord-2024-2025",
 "status": "approved",
 "publish_date": "2026-09-26",
 "title": "Ilulissat Icefjord and Disko Bay, Greenland, August 2024 to October 2025",
 "summary": "Thirty-eight Sentinel-1 passes at a twelve-day interval record the icefjord's discharge, the freeze and break-up of Disko Bay, and the seasonal advance and retreat of sea ice over fifteen months.",
 "place": {
  "name": "Ilulissat Icefjord and Disko Bay, Greenland",
  "lat": 69.2,
  "lon": -51.1
 },
 "layout": "loop",
 "frames": [
  {
   "acquired": "2024-08-10",
   "label": "2024-08-10",
   "resolution_m": 40,
   "scenes": [
    "S1A_IW_GRDH_1SDH_20240810T095231_20240810T095256_055149_06B88D"
   ],
   "avif": "/media/banner-work-1920-poster.52cd15bd.avif",
   "webp": "/media/banner-work-1920-poster.6193c1e3.webp",
   "width": 1920,
   "height": 480,
   "alt": "Radar image of Ilulissat Icefjord and Disko Bay in April 2025, with bright fractured sea ice and dark open water."
  },
  {
   "acquired": "2025-10-28",
   "label": "2025-10-28",
   "resolution_m": 40,
   "scenes": [
    "S1A_IW_GRDH_1SDH_20251028T095223_20251028T095248_061624_07B2C5"
   ],
   "avif": "/media/banner-work-1920-poster.52cd15bd.avif",
   "webp": "/media/banner-work-1920-poster.6193c1e3.webp",
   "width": 1920,
   "height": 480,
   "alt": "Last frame of the sequence, October 2025."
  }
 ],
 "loop": {
  "poster_avif": "/media/banner-work-1920-poster.52cd15bd.avif",
  "poster_webp": "/media/banner-work-1920-poster.6193c1e3.webp",
  "mp4": "/media/banner-work-1920.166eabca.mp4",
  "webm": "/media/banner-work-1920.8b1aff83.webm",
  "width": 1920,
  "height": 480,
  "phone_poster_avif": "/media/banner-work-phone-poster.2229b217.avif",
  "phone_poster_webp": "/media/banner-work-phone-poster.62c09396.webp",
  "phone_mp4": "/media/banner-work-phone.ec5d79d4.mp4",
  "phone_webm": "/media/banner-work-phone.996fc225.webm"
 },
 "sensor": {
  "source": "Sentinel-1",
  "product": "Sentinel-1A interferometric wide swath, ground-range detected, HH polarisation, relative orbit 127",
  "catalog": "Microsoft Planetary Computer STAC, collection sentinel-1-grd"
 },
 "modality": "sar",
 "themes": [
  "ice-and-snow",
  "coasts"
 ],
 "lane": "earth-systems",
 "region": {
  "country": "greenland",
  "admin": "Avannaata"
 },
 "occasions": [
  "arctic-sea-ice-maximum",
  "arctic-sea-ice-minimum"
 ],
 "overlays": [],
 "rights": {
  "imagery": "Contains modified Copernicus Sentinel data 2024, 2025. Copernicus Sentinel data is free, full, and open.",
  "overlay": "",
  "render": "Heimdall Research",
  "credit": "Contains modified Copernicus Sentinel data 2024, 2025."
 },
 "ctas": {
  "print": false,
  "analysis": true
 },
 "related": {
  "observations": [
   "obs-0002"
  ],
  "field_notes": [],
  "datasets": [
   "arctic-window"
  ]
 },
 "path": "/observations/ilulissat-icefjord-2024-2025/",
 "acquired_text": "2024-08-10 and 2025-10-28",
 "resolution_text": "40 m ground sample distance",
 "scene_ids": [
  "S1A_IW_GRDH_1SDH_20240810T095231_20240810T095256_055149_06B88D",
  "S1A_IW_GRDH_1SDH_20251028T095223_20251028T095248_061624_07B2C5"
 ],
 "url": "https://heimdallresearch.com/observations/ilulissat-icefjord-2024-2025/",
 "map": "https://heimdallresearch.com/media/maps/obs-0004.18565fbb.svg",
 "author": "Heimdall Research"
}