{
  "audit_date": "2026-10-10",
  "version": "1.1",
  "numeric_data_unchanged": true,
  "LST_checks": {
    "daily_rasters": 19,
    "dates_with_valid_land_LST": 15,
    "valid_summer_pixels": 526955,
    "count_matches_daily_validity": true,
    "summer_admission_matches_min4_each_month": true,
    "median_reconstruction_max_difference_C": 0.005003662109373863,
    "difference_is_quantization": "per-date arrays and final median independently rounded to 0.01°C",
    "monthly_valid_observations_on_summer_pixels": [
      1338709,
      686036,
      2971514
    ],
    "monthly_shares_pct": [
      26.7942,
      13.731,
      59.4748
    ],
    "summer_pixels_with_single_July_observation_pct": 70.0477,
    "sensitivity_to_equal_month_weight": {
      "note": "Diagnostic median of 3 monthly medians, not a replacement product. Difference does not establish which estimate is physically more accurate.",
      "pixels_difference_gt1C_pct": 16.9749,
      "pixels_difference_gt2C_pct": 2.9412
    }
  },
  "coverage": {
    "city_pixels": 712141,
    "land_pixels": 704497,
    "water_pixels": 7644,
    "water_buffer_pixels": 66570,
    "LST_valid_fraction_of_nonwater_city": 0.747988,
    "NDVI_valid_fraction_of_nonwater_city": 0.974512
  },
  "NDVI_checks": {
    "valid_pixels": 686541,
    "range": [
      -0.0444,
      0.9309
    ],
    "pixels_above_old_color_max_0_8": 284254,
    "percent_above_old_color_max_0_8": 41.4038,
    "display_range": [
      0,
      1
    ],
    "negative_values": "Clipped to first color labelled ≤0; actual numeric values retained.",
    "original_display_alpha_mask_preserved": true,
    "raw_per_date_NDVI_revalidated": false,
    "observation_count": "Original production rule at least 4 dates and representation of all 3 summer months; exact per-pixel counts not published, never inferred from LST."
  },
  "browser_rendering": "Not exercised; no supported browser QA capability available. DOM/readout behavior tested separately.",
  "sources": [
    "https://www.usgs.gov/landsat-missions/landsat-collection-2-surface-temperature",
    "https://www.usgs.gov/landsat-missions/landsat-collection-2-known-issues",
    "https://www.usgs.gov/landsat-missions/landsat-collection-2-quality-assessment-bands"
  ]
}