{
  "id": "fire-calendar-occupancy-v2",
  "training_years": [
    2013,
    2018
  ],
  "evaluation_years": [
    2019,
    2022
  ],
  "transfer_years": [
    2023,
    2025
  ],
  "version_policy": "Primary holdout retains MODIS 6.03; 61.03 in 2023–2025 is a separately reported transfer test. VIIRS version 2 throughout.",
  "primary_metric": "MAE of occupied cell-day/illumination units against Aqua; RMSE and signed bias also reported. No model selection on holdout.",
  "cell_size_m": 5000,
  "crs": "EPSG:6933",
  "time_tolerance_minutes": 90,
  "minimum_training_pairs": 20,
  "bootstrap_samples": 400,
  "bootstrap_seed": 20261114,
  "reference": "Aqua MODIS only",
  "target": "Suomi NPP VIIRS only",
  "outcome": "Occupied 5 km cell-day/illumination strata (D and N counted separately)",
  "quality": "MODIS confidence >=30; VIIRS nominal/high. These are sensor-specific filters, not equivalent probabilities.",
  "type_filter": "type=0, NASA presumed vegetation fire; not verified wildfire or independent incident",
  "fit": "Non-negative through-origin scale separately by day/night: k=sum(V*M)/sum(V^2), training only.",
  "pairing": "One AOI-day/daynight unit; both sensors have eligible detections and median UTC detection times differ by <=90 min. No inference of clear-sky swath coverage.",
  "evaluation_scope": "Conditional cross-sensor agreement on positive, near-time paired units, not fire-detection accuracy or coverage-corrected fire frequency.",
  "unresolved": [
    "Cloud/obscuration and non-detection coverage",
    "Sub-pixel sensitivity and FRP saturation",
    "Scan-angle footprint and geolocation differences",
    "Orbit drift and unmatched overpasses",
    "Transfer to unpaired days, other regions, sensors or processing versions"
  ]
}