{
  "generated_utc": "2026-08-03T08:29:52Z",
  "event": {
    "name": "Hong Kong black rainstorm, 7-8 Sept 2023",
    "note": "Heaviest hourly rainfall since records began in 1884. S1A imaged HK 18:25 HKT on 8 Sept, ~19 h after the black signal, through active rain; full coverage again 13 Sept."
  },
  "source": {
    "mission": "Sentinel-1A (ESA Copernicus), IW GRD -> RTC",
    "processing": "Microsoft Planetary Computer sentinel-1-rtc; Copernicus DEM GLO-30",
    "attribution": "Contains modified Copernicus Sentinel data 2023"
  },
  "method": "Per orbit: median of 4 pre-event scenes as baseline, dB log-ratio. 'Rapid' = first post-storm scene alone; 'confirmed' = median of 3 post-event scenes over the following month (a real scar stays bare, speckle does not repeat). Detection: hysteresis on VH change - seed <= -4.0 dB, grown to -3.0 dB - on slopes >= 15.0 deg (Copernicus DEM), 8-connected clusters >= 800 m2.",
  "limits": "Free C-band at 10 m is at its detection limit for HK-scale scars: single-scene speckle on steep vegetated slopes runs to -4 dB, the same order as the scar signal, so the same-day 'rapid' product is a candidate list, not a survey. Small failures (<~800 m2) are invisible. Layover/shadow blinds some slopes per look direction. Tasked X-band (~1 m) closes these gaps.",
  "verdict": "Negative result, and the point of the study: the reported Sept 2023 failures (scars of a few hundred to ~2000 m2) do not separate from speckle in free 10 m C-band amplitude data. The best case, Shiu Fai Terrace, surfaces mid-ranking among thousands of candidates; the others never surface at any threshold. Consistent with the ~1 ha reliable minimum in the literature. HK-scale landslide response needs tasked ~1 m X-band - same physics, same pipeline, 25-100x the resolution.",
  "rapid_counts": {
    "orbit113": 2509,
    "orbit11": 7207
  },
  "params": {
    "seed_db": -4.0,
    "grow_db": -3.0,
    "min_slope_deg": 15.0,
    "min_area_m2": 800.0
  },
  "n_candidates": 2545,
  "n_candidates_in_hk": 2341,
  "ground_truth_check": [
    {
      "site": "Shiu Fai Terrace, Wan Chai",
      "match_within_300m": {
        "rank_of_2341": 1722,
        "dist_m": 59,
        "lat": 22.27304,
        "lon": 114.17526,
        "in_hk": true,
        "area_m2": 800,
        "peak_dvh_db": -4.85,
        "mean_dvh_db": -3.8,
        "mean_dvv_db": -0.25,
        "mean_slope_deg": 17.2,
        "score": 10.66,
        "group": "orbit11"
      }
    },
    {
      "site": "Yiu Hing Road, Shau Kei Wan",
      "match_within_300m": null
    },
    {
      "site": "Shek O Road washout",
      "match_within_300m": null
    }
  ],
  "top_candidates": [
    {
      "lat": 22.3296,
      "lon": 114.0958,
      "in_hk": true,
      "area_m2": 1800,
      "peak_dvh_db": -20.84,
      "mean_dvh_db": -12.17,
      "mean_dvv_db": -7.06,
      "mean_slope_deg": 26.5,
      "score": 61.35,
      "group": "orbit11"
    },
    {
      "lat": 22.34048,
      "lon": 114.12307,
      "in_hk": true,
      "area_m2": 3200,
      "peak_dvh_db": -13.39,
      "mean_dvh_db": -6.28,
      "mean_dvv_db": -3.21,
      "mean_slope_deg": 28.1,
      "score": 46.82,
      "group": "orbit113"
    },
    {
      "lat": 22.37439,
      "lon": 114.10714,
      "in_hk": true,
      "area_m2": 1200,
      "peak_dvh_db": -17.99,
      "mean_dvh_db": -9.81,
      "mean_dvv_db": -6.81,
      "mean_slope_deg": 18.9,
      "score": 46.14,
      "group": "orbit11"
    },
    {
      "lat": 22.23958,
      "lon": 114.15294,
      "in_hk": true,
      "area_m2": 3800,
      "peak_dvh_db": -12.59,
      "mean_dvh_db": -6.78,
      "mean_dvv_db": -6.43,
      "mean_slope_deg": 31.3,
      "score": 46.12,
      "group": "orbit113"
    },
    {
      "lat": 22.361,
      "lon": 114.11704,
      "in_hk": true,
      "area_m2": 3900,
      "peak_dvh_db": -11.5,
      "mean_dvh_db": -6.21,
      "mean_dvv_db": -4.58,
      "mean_slope_deg": 22.9,
      "score": 42.41,
      "group": "orbit11"
    },
    {
      "lat": 22.54027,
      "lon": 114.17904,
      "in_hk": false,
      "area_m2": 8500,
      "peak_dvh_db": -8.96,
      "mean_dvh_db": -5.27,
      "mean_dvv_db": -7.98,
      "mean_slope_deg": 22.7,
      "score": 39.93,
      "group": "orbit11"
    },
    {
      "lat": 22.46075,
      "lon": 114.10311,
      "in_hk": true,
      "area_m2": 1200,
      "peak_dvh_db": -14.28,
      "mean_dvh_db": -8.51,
      "mean_dvv_db": -15.85,
      "mean_slope_deg": 17.6,
      "score": 36.63,
      "group": "orbit11"
    },
    {
      "lat": 22.36077,
      "lon": 114.13315,
      "in_hk": true,
      "area_m2": 1400,
      "peak_dvh_db": -13.34,
      "mean_dvh_db": -7.44,
      "mean_dvv_db": -3.71,
      "mean_slope_deg": 18.2,
      "score": 36.12,
      "group": "orbit11"
    },
    {
      "lat": 22.57064,
      "lon": 114.25883,
      "in_hk": false,
      "area_m2": 1600,
      "peak_dvh_db": -11.96,
      "mean_dvh_db": -7.22,
      "mean_dvv_db": -7.02,
      "mean_slope_deg": 17.2,
      "score": 33.89,
      "group": "orbit11"
    },
    {
      "lat": 22.26631,
      "lon": 114.27471,
      "in_hk": true,
      "area_m2": 3000,
      "peak_dvh_db": -9.83,
      "mean_dvh_db": -5.22,
      "mean_dvv_db": -3.53,
      "mean_slope_deg": 17.2,
      "score": 33.76,
      "group": "orbit11"
    },
    {
      "lat": 22.49821,
      "lon": 114.24219,
      "in_hk": true,
      "area_m2": 2600,
      "peak_dvh_db": -9.6,
      "mean_dvh_db": -5.14,
      "mean_dvv_db": -1.82,
      "mean_slope_deg": 27.9,
      "score": 31.64,
      "group": "orbit11"
    },
    {
      "lat": 22.39449,
      "lon": 114.04374,
      "in_hk": true,
      "area_m2": 2900,
      "peak_dvh_db": -8.49,
      "mean_dvh_db": -5.21,
      "mean_dvv_db": -5.33,
      "mean_slope_deg": 20.0,
      "score": 28.87,
      "group": "orbit11"
    },
    {
      "lat": 22.38712,
      "lon": 114.10703,
      "in_hk": true,
      "area_m2": 1800,
      "peak_dvh_db": -9.66,
      "mean_dvh_db": -5.46,
      "mean_dvv_db": -0.83,
      "mean_slope_deg": 20.4,
      "score": 28.44,
      "group": "orbit113"
    },
    {
      "lat": 22.37713,
      "lon": 113.98517,
      "in_hk": true,
      "area_m2": 1000,
      "peak_dvh_db": -11.67,
      "mean_dvh_db": -7.17,
      "mean_dvv_db": -1.5,
      "mean_slope_deg": 19.7,
      "score": 27.98,
      "group": "orbit11"
    },
    {
      "lat": 22.41212,
      "lon": 113.96781,
      "in_hk": true,
      "area_m2": 1300,
      "peak_dvh_db": -10.54,
      "mean_dvh_db": -7.08,
      "mean_dvv_db": -6.08,
      "mean_slope_deg": 19.7,
      "score": 27.82,
      "group": "orbit11"
    },
    {
      "lat": 22.47079,
      "lon": 114.16718,
      "in_hk": true,
      "area_m2": 5700,
      "peak_dvh_db": -6.82,
      "mean_dvh_db": -4.48,
      "mean_dvv_db": -0.47,
      "mean_slope_deg": 30.8,
      "score": 27.68,
      "group": "orbit113"
    },
    {
      "lat": 22.25022,
      "lon": 114.16732,
      "in_hk": true,
      "area_m2": 1800,
      "peak_dvh_db": -9.22,
      "mean_dvh_db": -5.12,
      "mean_dvv_db": -3.49,
      "mean_slope_deg": 23.5,
      "score": 27.14,
      "group": "orbit113"
    },
    {
      "lat": 22.39617,
      "lon": 114.23545,
      "in_hk": true,
      "area_m2": 8300,
      "peak_dvh_db": -6.01,
      "mean_dvh_db": -4.44,
      "mean_dvv_db": -1.12,
      "mean_slope_deg": 30.9,
      "score": 26.64,
      "group": "orbit113"
    },
    {
      "lat": 22.45696,
      "lon": 114.25879,
      "in_hk": true,
      "area_m2": 1200,
      "peak_dvh_db": -10.24,
      "mean_dvh_db": -6.85,
      "mean_dvv_db": -7.06,
      "mean_slope_deg": 23.0,
      "score": 26.27,
      "group": "orbit11"
    },
    {
      "lat": 22.56989,
      "lon": 114.25205,
      "in_hk": false,
      "area_m2": 1000,
      "peak_dvh_db": -10.77,
      "mean_dvh_db": -7.52,
      "mean_dvv_db": -7.51,
      "mean_slope_deg": 18.4,
      "score": 25.82,
      "group": "orbit11"
    },
    {
      "lat": 22.23702,
      "lon": 113.89786,
      "in_hk": true,
      "area_m2": 1900,
      "peak_dvh_db": -8.6,
      "mean_dvh_db": -5.38,
      "mean_dvv_db": -6.29,
      "mean_slope_deg": 18.9,
      "score": 25.77,
      "group": "orbit11"
    },
    {
      "lat": 22.34014,
      "lon": 114.12438,
      "in_hk": true,
      "area_m2": 2100,
      "peak_dvh_db": -8.28,
      "mean_dvh_db": -5.17,
      "mean_dvv_db": -9.82,
      "mean_slope_deg": 27.4,
      "score": 25.6,
      "group": "orbit11"
    },
    {
      "lat": 22.39329,
      "lon": 114.1125,
      "in_hk": true,
      "area_m2": 1200,
      "peak_dvh_db": -9.97,
      "mean_dvh_db": -6.09,
      "mean_dvv_db": -0.22,
      "mean_slope_deg": 19.3,
      "score": 25.58,
      "group": "orbit113"
    },
    {
      "lat": 22.31296,
      "lon": 114.22696,
      "in_hk": true,
      "area_m2": 1400,
      "peak_dvh_db": -9.3,
      "mean_dvh_db": -5.56,
      "mean_dvv_db": -5.88,
      "mean_slope_deg": 18.1,
      "score": 25.18,
      "group": "orbit113"
    },
    {
      "lat": 22.34459,
      "lon": 114.25177,
      "in_hk": true,
      "area_m2": 2000,
      "peak_dvh_db": -8.16,
      "mean_dvh_db": -4.7,
      "mean_dvv_db": -0.15,
      "mean_slope_deg": 23.3,
      "score": 24.86,
      "group": "orbit113"
    },
    {
      "lat": 22.24295,
      "lon": 114.19323,
      "in_hk": true,
      "area_m2": 2200,
      "peak_dvh_db": -7.69,
      "mean_dvh_db": -4.44,
      "mean_dvv_db": -0.5,
      "mean_slope_deg": 31.0,
      "score": 24.11,
      "group": "orbit11"
    },
    {
      "lat": 22.45371,
      "lon": 114.07674,
      "in_hk": true,
      "area_m2": 2700,
      "peak_dvh_db": -7.16,
      "mean_dvh_db": -4.31,
      "mean_dvv_db": -1.19,
      "mean_slope_deg": 19.0,
      "score": 23.84,
      "group": "orbit11"
    },
    {
      "lat": 22.27195,
      "lon": 114.17016,
      "in_hk": true,
      "area_m2": 1200,
      "peak_dvh_db": -9.25,
      "mean_dvh_db": -6.02,
      "mean_dvv_db": -5.67,
      "mean_slope_deg": 17.6,
      "score": 23.72,
      "group": "orbit113"
    },
    {
      "lat": 22.40548,
      "lon": 114.11674,
      "in_hk": true,
      "area_m2": 3500,
      "peak_dvh_db": -6.61,
      "mean_dvh_db": -4.17,
      "mean_dvv_db": -0.03,
      "mean_slope_deg": 27.4,
      "score": 23.7,
      "group": "orbit11"
    },
    {
      "lat": 22.233,
      "lon": 114.23926,
      "in_hk": true,
      "area_m2": 2300,
      "peak_dvh_db": -7.41,
      "mean_dvh_db": -5.5,
      "mean_dvv_db": -1.6,
      "mean_slope_deg": 24.2,
      "score": 23.53,
      "group": "orbit113"
    },
    {
      "lat": 22.55987,
      "lon": 114.21928,
      "in_hk": false,
      "area_m2": 1200,
      "peak_dvh_db": -9.09,
      "mean_dvh_db": -5.08,
      "mean_dvv_db": -5.07,
      "mean_slope_deg": 27.6,
      "score": 23.31,
      "group": "orbit11"
    },
    {
      "lat": 22.3969,
      "lon": 114.26323,
      "in_hk": true,
      "area_m2": 2400,
      "peak_dvh_db": -7.17,
      "mean_dvh_db": -4.47,
      "mean_dvv_db": -0.28,
      "mean_slope_deg": 24.5,
      "score": 23.09,
      "group": "orbit113"
    },
    {
      "lat": 22.23661,
      "lon": 113.89687,
      "in_hk": true,
      "area_m2": 2300,
      "peak_dvh_db": -7.21,
      "mean_dvh_db": -5.11,
      "mean_dvv_db": -3.75,
      "mean_slope_deg": 21.3,
      "score": 22.92,
      "group": "orbit11"
    },
    {
      "lat": 22.33324,
      "lon": 114.3237,
      "in_hk": true,
      "area_m2": 1900,
      "peak_dvh_db": -7.63,
      "mean_dvh_db": -4.66,
      "mean_dvv_db": -0.68,
      "mean_slope_deg": 25.6,
      "score": 22.86,
      "group": "orbit113"
    },
    {
      "lat": 22.50508,
      "lon": 114.18983,
      "in_hk": true,
      "area_m2": 3400,
      "peak_dvh_db": -6.42,
      "mean_dvh_db": -4.92,
      "mean_dvv_db": 1.71,
      "mean_slope_deg": 36.6,
      "score": 22.81,
      "group": "orbit11"
    },
    {
      "lat": 22.23259,
      "lon": 113.89469,
      "in_hk": true,
      "area_m2": 3700,
      "peak_dvh_db": -6.25,
      "mean_dvh_db": -4.66,
      "mean_dvv_db": -3.58,
      "mean_slope_deg": 18.8,
      "score": 22.74,
      "group": "orbit11"
    },
    {
      "lat": 22.40754,
      "lon": 114.33025,
      "in_hk": true,
      "area_m2": 1700,
      "peak_dvh_db": -7.83,
      "mean_dvh_db": -4.99,
      "mean_dvv_db": -0.77,
      "mean_slope_deg": 24.5,
      "score": 22.64,
      "group": "orbit11"
    },
    {
      "lat": 22.28039,
      "lon": 113.94834,
      "in_hk": true,
      "area_m2": 3300,
      "peak_dvh_db": -6.42,
      "mean_dvh_db": -4.31,
      "mean_dvv_db": -1.78,
      "mean_slope_deg": 37.4,
      "score": 22.63,
      "group": "orbit11"
    },
    {
      "lat": 22.4023,
      "lon": 113.99454,
      "in_hk": true,
      "area_m2": 4600,
      "peak_dvh_db": -5.87,
      "mean_dvh_db": -3.95,
      "mean_dvv_db": -0.48,
      "mean_slope_deg": 24.4,
      "score": 22.6,
      "group": "orbit11"
    },
    {
      "lat": 22.25648,
      "lon": 113.85954,
      "in_hk": true,
      "area_m2": 2000,
      "peak_dvh_db": -7.42,
      "mean_dvh_db": -4.5,
      "mean_dvv_db": -0.65,
      "mean_slope_deg": 27.0,
      "score": 22.6,
      "group": "orbit11"
    },
    {
      "lat": 22.27687,
      "lon": 113.95773,
      "in_hk": true,
      "area_m2": 6800,
      "peak_dvh_db": -5.33,
      "mean_dvh_db": -3.95,
      "mean_dvv_db": 1.27,
      "mean_slope_deg": 37.7,
      "score": 22.57,
      "group": "orbit11"
    },
    {
      "lat": 22.54898,
      "lon": 114.17318,
      "in_hk": false,
      "area_m2": 2700,
      "peak_dvh_db": -6.74,
      "mean_dvh_db": -4.11,
      "mean_dvv_db": -1.89,
      "mean_slope_deg": 27.3,
      "score": 22.46,
      "group": "orbit11"
    },
    {
      "lat": 22.24953,
      "lon": 114.16713,
      "in_hk": true,
      "area_m2": 800,
      "peak_dvh_db": -10.11,
      "mean_dvh_db": -7.62,
      "mean_dvv_db": -9.13,
      "mean_slope_deg": 21.1,
      "score": 22.22,
      "group": "orbit113"
    },
    {
      "lat": 22.36395,
      "lon": 114.21827,
      "in_hk": true,
      "area_m2": 3700,
      "peak_dvh_db": -6.05,
      "mean_dvh_db": -4.35,
      "mean_dvv_db": -0.78,
      "mean_slope_deg": 28.4,
      "score": 21.99,
      "group": "orbit113"
    },
    {
      "lat": 22.23972,
      "lon": 114.19021,
      "in_hk": true,
      "area_m2": 1200,
      "peak_dvh_db": -8.56,
      "mean_dvh_db": -4.9,
      "mean_dvv_db": -0.97,
      "mean_slope_deg": 24.6,
      "score": 21.95,
      "group": "orbit113"
    },
    {
      "lat": 22.36908,
      "lon": 114.09333,
      "in_hk": true,
      "area_m2": 1800,
      "peak_dvh_db": -7.45,
      "mean_dvh_db": -5.2,
      "mean_dvv_db": 4.48,
      "mean_slope_deg": 18.7,
      "score": 21.93,
      "group": "orbit11"
    },
    {
      "lat": 22.37134,
      "lon": 114.38504,
      "in_hk": true,
      "area_m2": 2800,
      "peak_dvh_db": -6.4,
      "mean_dvh_db": -4.26,
      "mean_dvv_db": -0.9,
      "mean_slope_deg": 30.7,
      "score": 21.56,
      "group": "orbit113"
    },
    {
      "lat": 22.42319,
      "lon": 114.31921,
      "in_hk": true,
      "area_m2": 3800,
      "peak_dvh_db": -5.86,
      "mean_dvh_db": -4.01,
      "mean_dvv_db": -2.14,
      "mean_slope_deg": 30.8,
      "score": 21.48,
      "group": "orbit113"
    },
    {
      "lat": 22.46406,
      "lon": 114.08151,
      "in_hk": true,
      "area_m2": 3500,
      "peak_dvh_db": -5.99,
      "mean_dvh_db": -4.34,
      "mean_dvv_db": 0.09,
      "mean_slope_deg": 31.0,
      "score": 21.46,
      "group": "orbit11"
    },
    {
      "lat": 22.31185,
      "lon": 114.27662,
      "in_hk": true,
      "area_m2": 800,
      "peak_dvh_db": -9.75,
      "mean_dvh_db": -6.34,
      "mean_dvv_db": -1.35,
      "mean_slope_deg": 17.4,
      "score": 21.43,
      "group": "orbit113"
    },
    {
      "lat": 22.36567,
      "lon": 114.02916,
      "in_hk": true,
      "area_m2": 2300,
      "peak_dvh_db": -6.72,
      "mean_dvh_db": -4.13,
      "mean_dvv_db": 0.25,
      "mean_slope_deg": 29.1,
      "score": 21.37,
      "group": "orbit11"
    },
    {
      "lat": 22.39654,
      "lon": 114.19323,
      "in_hk": true,
      "area_m2": 1100,
      "peak_dvh_db": -8.59,
      "mean_dvh_db": -5.83,
      "mean_dvv_db": -8.43,
      "mean_slope_deg": 24.4,
      "score": 21.35,
      "group": "orbit113"
    },
    {
      "lat": 22.45909,
      "lon": 114.07388,
      "in_hk": true,
      "area_m2": 3600,
      "peak_dvh_db": -5.88,
      "mean_dvh_db": -4.18,
      "mean_dvv_db": -0.87,
      "mean_slope_deg": 28.4,
      "score": 21.22,
      "group": "orbit11"
    },
    {
      "lat": 22.39943,
      "lon": 114.11635,
      "in_hk": true,
      "area_m2": 3200,
      "peak_dvh_db": -6.05,
      "mean_dvh_db": -4.16,
      "mean_dvv_db": -0.93,
      "mean_slope_deg": 23.8,
      "score": 21.17,
      "group": "orbit11"
    },
    {
      "lat": 22.39997,
      "lon": 114.11692,
      "in_hk": true,
      "area_m2": 4000,
      "peak_dvh_db": -5.66,
      "mean_dvh_db": -4.18,
      "mean_dvv_db": 1.42,
      "mean_slope_deg": 27.8,
      "score": 21.0,
      "group": "orbit113"
    },
    {
      "lat": 22.23338,
      "lon": 113.90954,
      "in_hk": true,
      "area_m2": 1700,
      "peak_dvh_db": -7.26,
      "mean_dvh_db": -4.83,
      "mean_dvv_db": -0.09,
      "mean_slope_deg": 23.6,
      "score": 20.99,
      "group": "orbit11"
    },
    {
      "lat": 22.34529,
      "lon": 114.18705,
      "in_hk": true,
      "area_m2": 2000,
      "peak_dvh_db": -6.89,
      "mean_dvh_db": -4.31,
      "mean_dvv_db": -0.7,
      "mean_slope_deg": 24.7,
      "score": 20.98,
      "group": "orbit11"
    },
    {
      "lat": 22.55727,
      "lon": 114.19032,
      "in_hk": false,
      "area_m2": 1200,
      "peak_dvh_db": -8.12,
      "mean_dvh_db": -4.99,
      "mean_dvv_db": -5.8,
      "mean_slope_deg": 25.0,
      "score": 20.84,
      "group": "orbit11"
    },
    {
      "lat": 22.41675,
      "lon": 114.34871,
      "in_hk": true,
      "area_m2": 2300,
      "peak_dvh_db": -6.55,
      "mean_dvh_db": -4.64,
      "mean_dvv_db": 1.76,
      "mean_slope_deg": 21.8,
      "score": 20.82,
      "group": "orbit113"
    },
    {
      "lat": 22.54412,
      "lon": 114.25434,
      "in_hk": false,
      "area_m2": 1600,
      "peak_dvh_db": -7.31,
      "mean_dvh_db": -4.74,
      "mean_dvv_db": -0.31,
      "mean_slope_deg": 24.2,
      "score": 20.71,
      "group": "orbit113"
    },
    {
      "lat": 22.39882,
      "lon": 114.11356,
      "in_hk": true,
      "area_m2": 3300,
      "peak_dvh_db": -5.87,
      "mean_dvh_db": -3.84,
      "mean_dvv_db": 0.83,
      "mean_slope_deg": 19.0,
      "score": 20.7,
      "group": "orbit113"
    },
    {
      "lat": 22.20915,
      "lon": 113.84812,
      "in_hk": true,
      "area_m2": 2400,
      "peak_dvh_db": -6.43,
      "mean_dvh_db": -4.4,
      "mean_dvv_db": -1.16,
      "mean_slope_deg": 23.0,
      "score": 20.7,
      "group": "orbit11"
    },
    {
      "lat": 22.22749,
      "lon": 114.20358,
      "in_hk": true,
      "area_m2": 3000,
      "peak_dvh_db": -6.03,
      "mean_dvh_db": -4.52,
      "mean_dvv_db": -0.81,
      "mean_slope_deg": 29.8,
      "score": 20.69,
      "group": "orbit113"
    },
    {
      "lat": 22.41613,
      "lon": 114.30903,
      "in_hk": true,
      "area_m2": 2700,
      "peak_dvh_db": -6.2,
      "mean_dvh_db": -3.88,
      "mean_dvv_db": -0.19,
      "mean_slope_deg": 25.2,
      "score": 20.65,
      "group": "orbit11"
    },
    {
      "lat": 22.42745,
      "lon": 114.38422,
      "in_hk": true,
      "area_m2": 3700,
      "peak_dvh_db": -5.66,
      "mean_dvh_db": -4.07,
      "mean_dvv_db": -0.46,
      "mean_slope_deg": 33.1,
      "score": 20.57,
      "group": "orbit113"
    },
    {
      "lat": 22.52206,
      "lon": 113.9374,
      "in_hk": true,
      "area_m2": 1600,
      "peak_dvh_db": -7.25,
      "mean_dvh_db": -5.05,
      "mean_dvv_db": -4.77,
      "mean_slope_deg": 20.0,
      "score": 20.54,
      "group": "orbit11"
    },
    {
      "lat": 22.37558,
      "lon": 114.16623,
      "in_hk": true,
      "area_m2": 1600,
      "peak_dvh_db": -7.25,
      "mean_dvh_db": -5.16,
      "mean_dvv_db": -4.39,
      "mean_slope_deg": 19.5,
      "score": 20.54,
      "group": "orbit11"
    },
    {
      "lat": 22.26447,
      "lon": 114.13177,
      "in_hk": true,
      "area_m2": 1700,
      "peak_dvh_db": -7.08,
      "mean_dvh_db": -4.86,
      "mean_dvv_db": 1.01,
      "mean_slope_deg": 26.0,
      "score": 20.45,
      "group": "orbit11"
    },
    {
      "lat": 22.50194,
      "lon": 114.35736,
      "in_hk": true,
      "area_m2": 1300,
      "peak_dvh_db": -7.74,
      "mean_dvh_db": -4.85,
      "mean_dvv_db": -1.93,
      "mean_slope_deg": 30.8,
      "score": 20.43,
      "group": "orbit113"
    },
    {
      "lat": 22.4506,
      "lon": 114.29323,
      "in_hk": true,
      "area_m2": 2000,
      "peak_dvh_db": -6.7,
      "mean_dvh_db": -3.91,
      "mean_dvv_db": -0.83,
      "mean_slope_deg": 28.6,
      "score": 20.38,
      "group": "orbit113"
    },
    {
      "lat": 22.38791,
      "lon": 114.37395,
      "in_hk": true,
      "area_m2": 2200,
      "peak_dvh_db": -6.5,
      "mean_dvh_db": -4.37,
      "mean_dvv_db": 0.2,
      "mean_slope_deg": 23.8,
      "score": 20.37,
      "group": "orbit11"
    },
    {
      "lat": 22.34709,
      "lon": 114.13154,
      "in_hk": true,
      "area_m2": 1100,
      "peak_dvh_db": -8.2,
      "mean_dvh_db": -4.45,
      "mean_dvv_db": -3.22,
      "mean_slope_deg": 22.1,
      "score": 20.37,
      "group": "orbit11"
    },
    {
      "lat": 22.26626,
      "lon": 114.27879,
      "in_hk": true,
      "area_m2": 800,
      "peak_dvh_db": -9.26,
      "mean_dvh_db": -5.7,
      "mean_dvv_db": -3.26,
      "mean_slope_deg": 18.8,
      "score": 20.35,
      "group": "orbit113"
    },
    {
      "lat": 22.24387,
      "lon": 114.14819,
      "in_hk": true,
      "area_m2": 1400,
      "peak_dvh_db": -7.49,
      "mean_dvh_db": -4.88,
      "mean_dvv_db": -4.47,
      "mean_slope_deg": 24.0,
      "score": 20.29,
      "group": "orbit11"
    },
    {
      "lat": 22.44193,
      "lon": 114.10746,
      "in_hk": true,
      "area_m2": 5900,
      "peak_dvh_db": -4.93,
      "mean_dvh_db": -3.72,
      "mean_dvv_db": -0.7,
      "mean_slope_deg": 30.0,
      "score": 20.19,
      "group": "orbit11"
    },
    {
      "lat": 22.55993,
      "lon": 114.21875,
      "in_hk": false,
      "area_m2": 1400,
      "peak_dvh_db": -7.44,
      "mean_dvh_db": -5.25,
      "mean_dvv_db": -6.76,
      "mean_slope_deg": 19.7,
      "score": 20.14,
      "group": "orbit113"
    },
    {
      "lat": 22.38968,
      "lon": 114.23769,
      "in_hk": true,
      "area_m2": 1900,
      "peak_dvh_db": -6.69,
      "mean_dvh_db": -4.49,
      "mean_dvv_db": -0.59,
      "mean_slope_deg": 30.0,
      "score": 20.03,
      "group": "orbit113"
    },
    {
      "lat": 22.33045,
      "lon": 114.04256,
      "in_hk": true,
      "area_m2": 1900,
      "peak_dvh_db": -6.68,
      "mean_dvh_db": -4.35,
      "mean_dvv_db": -2.41,
      "mean_slope_deg": 24.3,
      "score": 20.01,
      "group": "orbit11"
    },
    {
      "lat": 22.41166,
      "lon": 114.3668,
      "in_hk": true,
      "area_m2": 1300,
      "peak_dvh_db": -7.52,
      "mean_dvh_db": -5.14,
      "mean_dvv_db": 0.09,
      "mean_slope_deg": 21.9,
      "score": 19.86,
      "group": "orbit113"
    },
    {
      "lat": 22.41448,
      "lon": 114.0022,
      "in_hk": true,
      "area_m2": 1900,
      "peak_dvh_db": -6.61,
      "mean_dvh_db": -4.78,
      "mean_dvv_db": -0.16,
      "mean_slope_deg": 23.0,
      "score": 19.8,
      "group": "orbit11"
    },
    {
      "lat": 22.40107,
      "lon": 114.34628,
      "in_hk": true,
      "area_m2": 1500,
      "peak_dvh_db": -7.14,
      "mean_dvh_db": -4.51,
      "mean_dvv_db": 1.0,
      "mean_slope_deg": 22.6,
      "score": 19.8,
      "group": "orbit11"
    },
    {
      "lat": 22.2395,
      "lon": 114.15151,
      "in_hk": true,
      "area_m2": 2500,
      "peak_dvh_db": -6.08,
      "mean_dvh_db": -4.24,
      "mean_dvv_db": -5.24,
      "mean_slope_deg": 27.2,
      "score": 19.8,
      "group": "orbit11"
    },
    {
      "lat": 22.36245,
      "lon": 114.13888,
      "in_hk": true,
      "area_m2": 1000,
      "peak_dvh_db": -8.21,
      "mean_dvh_db": -5.61,
      "mean_dvv_db": -7.76,
      "mean_slope_deg": 20.4,
      "score": 19.69,
      "group": "orbit11"
    },
    {
      "lat": 22.2396,
      "lon": 114.18964,
      "in_hk": true,
      "area_m2": 2500,
      "peak_dvh_db": -6.04,
      "mean_dvh_db": -3.97,
      "mean_dvv_db": -3.36,
      "mean_slope_deg": 32.8,
      "score": 19.69,
      "group": "orbit11"
    },
    {
      "lat": 22.51641,
      "lon": 114.1062,
      "in_hk": true,
      "area_m2": 1800,
      "peak_dvh_db": -6.66,
      "mean_dvh_db": -4.71,
      "mean_dvv_db": -1.63,
      "mean_slope_deg": 24.7,
      "score": 19.6,
      "group": "orbit11"
    },
    {
      "lat": 22.46429,
      "lon": 114.05601,
      "in_hk": true,
      "area_m2": 1500,
      "peak_dvh_db": -7.07,
      "mean_dvh_db": -4.13,
      "mean_dvv_db": -0.24,
      "mean_slope_deg": 24.8,
      "score": 19.6,
      "group": "orbit11"
    },
    {
      "lat": 22.38893,
      "lon": 114.2216,
      "in_hk": true,
      "area_m2": 1800,
      "peak_dvh_db": -6.65,
      "mean_dvh_db": -4.82,
      "mean_dvv_db": 0.34,
      "mean_slope_deg": 29.7,
      "score": 19.59,
      "group": "orbit113"
    },
    {
      "lat": 22.4141,
      "lon": 113.93099,
      "in_hk": true,
      "area_m2": 1400,
      "peak_dvh_db": -7.23,
      "mean_dvh_db": -4.59,
      "mean_dvv_db": -5.61,
      "mean_slope_deg": 20.4,
      "score": 19.58,
      "group": "orbit11"
    },
    {
      "lat": 22.24353,
      "lon": 114.29057,
      "in_hk": true,
      "area_m2": 1600,
      "peak_dvh_db": -6.91,
      "mean_dvh_db": -4.55,
      "mean_dvv_db": -1.42,
      "mean_slope_deg": 22.7,
      "score": 19.58,
      "group": "orbit11"
    },
    {
      "lat": 22.23081,
      "lon": 114.20032,
      "in_hk": true,
      "area_m2": 5500,
      "peak_dvh_db": -4.83,
      "mean_dvh_db": -3.91,
      "mean_dvv_db": 1.4,
      "mean_slope_deg": 32.1,
      "score": 19.44,
      "group": "orbit113"
    },
    {
      "lat": 22.31855,
      "lon": 114.02959,
      "in_hk": true,
      "area_m2": 1900,
      "peak_dvh_db": -6.48,
      "mean_dvh_db": -4.35,
      "mean_dvv_db": -1.93,
      "mean_slope_deg": 26.4,
      "score": 19.41,
      "group": "orbit11"
    },
    {
      "lat": 22.25581,
      "lon": 113.94285,
      "in_hk": true,
      "area_m2": 3000,
      "peak_dvh_db": -5.65,
      "mean_dvh_db": -4.0,
      "mean_dvv_db": -0.01,
      "mean_slope_deg": 29.1,
      "score": 19.41,
      "group": "orbit11"
    },
    {
      "lat": 22.45354,
      "lon": 114.09384,
      "in_hk": true,
      "area_m2": 1000,
      "peak_dvh_db": -8.08,
      "mean_dvh_db": -4.97,
      "mean_dvv_db": -3.74,
      "mean_slope_deg": 18.4,
      "score": 19.37,
      "group": "orbit11"
    },
    {
      "lat": 22.46256,
      "lon": 114.0756,
      "in_hk": true,
      "area_m2": 1500,
      "peak_dvh_db": -6.98,
      "mean_dvh_db": -4.68,
      "mean_dvv_db": -1.41,
      "mean_slope_deg": 18.4,
      "score": 19.35,
      "group": "orbit11"
    },
    {
      "lat": 22.3597,
      "lon": 114.29386,
      "in_hk": true,
      "area_m2": 1900,
      "peak_dvh_db": -6.45,
      "mean_dvh_db": -4.48,
      "mean_dvv_db": 1.71,
      "mean_slope_deg": 25.3,
      "score": 19.32,
      "group": "orbit113"
    },
    {
      "lat": 22.3806,
      "lon": 114.07264,
      "in_hk": true,
      "area_m2": 2000,
      "peak_dvh_db": -6.34,
      "mean_dvh_db": -4.15,
      "mean_dvv_db": 1.32,
      "mean_slope_deg": 25.4,
      "score": 19.3,
      "group": "orbit11"
    },
    {
      "lat": 22.3869,
      "lon": 114.1147,
      "in_hk": true,
      "area_m2": 2300,
      "peak_dvh_db": -6.07,
      "mean_dvh_db": -4.08,
      "mean_dvv_db": 1.23,
      "mean_slope_deg": 18.8,
      "score": 19.28,
      "group": "orbit113"
    },
    {
      "lat": 22.23781,
      "lon": 114.18902,
      "in_hk": true,
      "area_m2": 1300,
      "peak_dvh_db": -7.29,
      "mean_dvh_db": -4.89,
      "mean_dvv_db": -2.72,
      "mean_slope_deg": 18.0,
      "score": 19.24,
      "group": "orbit11"
    },
    {
      "lat": 22.49099,
      "lon": 114.27652,
      "in_hk": true,
      "area_m2": 1800,
      "peak_dvh_db": -6.51,
      "mean_dvh_db": -4.15,
      "mean_dvv_db": -2.71,
      "mean_slope_deg": 24.3,
      "score": 19.18,
      "group": "orbit11"
    },
    {
      "lat": 22.41924,
      "lon": 114.24529,
      "in_hk": true,
      "area_m2": 2800,
      "peak_dvh_db": -5.7,
      "mean_dvh_db": -4.09,
      "mean_dvv_db": 0.46,
      "mean_slope_deg": 38.1,
      "score": 19.18,
      "group": "orbit11"
    }
  ]
}