ARIES

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{
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    },
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    "zone_id": "russia_ust_luga_approach",
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    "score": {
        "value": 79,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 155m, avg 208m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 150 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both very slow; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b130m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ARCTICA and ARIES) maintained close proximity (min 155m, avg 208m) for 150 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.9 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
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        "searched_at": "2026-09-22T23:45:05.677953+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260922T153942_20260922T154007_009562_013076_7669_COG",
        "scene_datetime": "2026-09-22T15:39:42.324748Z",
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        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1370381_thumbnail_20260922234518.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1370381_thumbnail_20260922234518.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

{
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        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1367116_thumbnail_20260922120007.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1367116_thumbnail_20260922120007.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

{
    "vessel_a": {
        "mmsi": 273333320,
        "imo": 6920147,
        "name": "ARCTICA",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273538310,
        "imo": 7802110,
        "name": "ARIES",
        "flag": "Russia"
    },
    "min_distance_m": 260.30000000000001136868377216160297393798828125,
    "avg_distance_m": 264.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 6.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 191,
    "overlap_duration_s": 11459,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-09-22T05:00:25+00:00",
        "end": "2026-09-22T08:11:24+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 260m, avg 264m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 191 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ARCTICA and ARIES) maintained close proximity (min 260m, avg 264m) for 191 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.90957279999999940400812192820012569427490234375,
            "lon": 30.228009700000001203079591505229473114013671875
        },
        "time_window": {
            "start_ts": "2026-09-22T05:00:25+00:00",
            "end_ts": "2026-09-22T08:11:24+00:00"
        },
        "searched_at": "2026-09-22T10:15:01.931632+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260922T042445_20260922T042510_009555_01303C_2F1F_COG",
        "scene_datetime": "2026-09-22T04:24:45.847967Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 26.61829900000000037607605918310582637786865234375,
            "min_lat": 59.33274800000000226418706006370484828948974609375,
            "max_lon": 31.929393999999998499106368399225175380706787109375,
            "max_lat": 61.26128800000000040881786844693124294281005859375
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1366541_thumbnail_20260922101522.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1366541_thumbnail_20260922101522.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

{
    "vessel_a": {
        "mmsi": 273353580,
        "imo": 9537109,
        "name": "ORENBURG",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273538310,
        "imo": 7802110,
        "name": "ARIES",
        "flag": "Russia"
    },
    "min_distance_m": 455.3999999999999772626324556767940521240234375,
    "avg_distance_m": 471.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 22.199999999999999289457264239899814128875732421875,
    "duration_minutes": 263,
    "overlap_duration_s": 15781,
    "speed_a_avg": 1.4499999999999999555910790149937383830547332763671875,
    "speed_a_std": 0.34999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.200000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 1.4499999999999999555910790149937383830547332763671875,
            "max_sog": 1.6999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.200000000000000011102230246251565404236316680908203125,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-09-21T16:32:00+00:00",
        "end": "2026-09-21T20:55:01+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 67,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 455m, avg 471m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 263 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both slow; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b122m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ORENBURG and ARIES) maintained close proximity (min 455m, avg 471m) for 263 minutes. Both vessels were slow-moving (avg speeds 1.4 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.9109533000000027413989300839602947235107421875,
            "lon": 30.2283541999999982863300829194486141204833984375
        },
        "time_window": {
            "start_ts": "2026-09-21T16:32:00+00:00",
            "end_ts": "2026-09-21T20:55:01+00:00"
        },
        "searched_at": "2026-09-21T22:45:01.471802+00:00",
        "scene_id": "S1D_IW_GRDH_1SDV_20260921T154756_20260921T154821_004678_008BD8_C6AD_COG",
        "scene_datetime": "2026-09-21T15:47:56.493819Z",
        "platform": "sentinel-1d",
        "bbox": {
            "min_lon": 25.073927000000001186208464787341654300689697265625,
            "min_lat": 59.05168499999999909277903498150408267974853515625,
            "max_lon": 30.35587699999999955480234348215162754058837890625,
            "max_lat": 60.9810599999999993769961292855441570281982421875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1363181_thumbnail_20260921224506.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1363181_thumbnail_20260921224506.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

{
    "vessel_a": {
        "mmsi": 273333320,
        "imo": 6920147,
        "name": "ARCTICA",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273538310,
        "imo": 7802110,
        "name": "ARIES",
        "flag": "Russia"
    },
    "min_distance_m": 262.3999999999999772626324556767940521240234375,
    "avg_distance_m": 268,
    "distance_consistency_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 80,
    "overlap_duration_s": 4800,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.479999999999999982236431605997495353221893310546875,
    "speed_b_std": 0.429999999999999993338661852249060757458209991455078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.479999999999999982236431605997495353221893310546875,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
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    },
    "time_window": {
        "start": "2026-09-21T14:05:04+00:00",
        "end": "2026-09-21T15:25:04+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 262m, avg 268m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 80 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ARCTICA and ARIES) maintained close proximity (min 262m, avg 268m) for 80 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
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            "lon": 30.2281310999999988098352332599461078643798828125
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        "time_window": {
            "start_ts": "2026-09-21T14:05:04+00:00",
            "end_ts": "2026-09-21T15:25:04+00:00"
        },
        "searched_at": "2026-09-21T20:45:01.693486+00:00",
        "scene_id": "S1D_IW_GRDH_1SDV_20260921T154756_20260921T154821_004678_008BD8_C6AD_COG",
        "scene_datetime": "2026-09-21T15:47:56.493819Z",
        "platform": "sentinel-1d",
        "bbox": {
            "min_lon": 25.073927000000001186208464787341654300689697265625,
            "min_lat": 59.05168499999999909277903498150408267974853515625,
            "max_lon": 30.35587699999999955480234348215162754058837890625,
            "max_lat": 60.9810599999999993769961292855441570281982421875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1362585_thumbnail_20260921204506.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1362585_thumbnail_20260921204506.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

{
    "vessel_a": {
        "mmsi": 273333320,
        "imo": 6920147,
        "name": "ARCTICA",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273538310,
        "imo": 7802110,
        "name": "ARIES",
        "flag": "Russia"
    },
    "min_distance_m": 243.400000000000005684341886080801486968994140625,
    "avg_distance_m": 262.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.699999999999999289457264239899814128875732421875,
    "duration_minutes": 143.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 8631,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.479999999999999982236431605997495353221893310546875,
    "speed_b_std": 0.35999999999999998667732370449812151491641998291015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.479999999999999982236431605997495353221893310546875,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        }
    },
    "time_window": {
        "start": "2026-09-21T13:01:13+00:00",
        "end": "2026-09-21T15:25:04+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 243m, avg 263m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 144 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ARCTICA and ARIES) maintained close proximity (min 243m, avg 263m) for 144 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

{
    "vessel_a": {
        "mmsi": 273538310,
        "imo": 7802110,
        "name": "ARIES",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273333320,
        "imo": 6920147,
        "name": "ARCTICA",
        "flag": "Russia"
    },
    "min_distance_m": 247.19999999999998863131622783839702606201171875,
    "avg_distance_m": 263.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 9,
    "duration_minutes": 141,
    "overlap_duration_s": 8459,
    "speed_a_avg": 0.320000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.270000000000000017763568394002504646778106689453125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.320000000000000006661338147750939242541790008544921875,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-21T12:12:14+00:00",
        "end": "2026-09-21T14:33:13+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 247m, avg 263m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 141 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ARIES and ARCTICA) maintained close proximity (min 247m, avg 263m) for 141 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_ust_luga_approach",
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    "first_point": {
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    "last_point": {
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}

{
    "radius_m": 16.699999999999999289457264239899814128875732421875,
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    "points": 61,
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{
    "vessel_a": {
        "mmsi": 273333320,
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        "name": "ARCTICA",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273538310,
        "imo": 7802110,
        "name": "ARIES",
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    "min_distance_m": 257.69999999999998863131622783839702606201171875,
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    "speed_a_avg": 0,
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    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
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            "max_sog": 0.200000000000000011102230246251565404236316680908203125
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    },
    "time_window": {
        "start": "2026-09-21T11:06:53+00:00",
        "end": "2026-09-21T12:53:04+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 258m, avg 260m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 106 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ARCTICA and ARIES) maintained close proximity (min 258m, avg 260m) for 106 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.9088437999999996463884599506855010986328125,
            "lon": 30.228882899999998556950231431983411312103271484375
        },
        "time_window": {
            "start_ts": "2026-09-21T11:06:53+00:00",
            "end_ts": "2026-09-21T12:53:04+00:00"
        },
        "searched_at": "2026-09-21T17:45:01.256094+00:00",
        "scene_id": "S1D_IW_GRDH_1SDV_20260921T154756_20260921T154821_004678_008BD8_C6AD_COG",
        "scene_datetime": "2026-09-21T15:47:56.493819Z",
        "platform": "sentinel-1d",
        "bbox": {
            "min_lon": 25.073927000000001186208464787341654300689697265625,
            "min_lat": 59.05168499999999909277903498150408267974853515625,
            "max_lon": 30.35587699999999955480234348215162754058837890625,
            "max_lat": 60.9810599999999993769961292855441570281982421875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1361649_thumbnail_20260921174506.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1361649_thumbnail_20260921174506.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

{
    "vessel_a": {
        "mmsi": 273333320,
        "imo": 6920147,
        "name": "ARCTICA",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273538310,
        "imo": 7802110,
        "name": "ARIES",
        "flag": "Russia"
    },
    "min_distance_m": 257.69999999999998863131622783839702606201171875,
    "avg_distance_m": 260.5,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 165.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 9941,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-09-21T10:07:23+00:00",
        "end": "2026-09-21T12:53:04+00:00"
    },
    "points_count": {
        "vessel_a": 34,
        "vessel_b": 34
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 258m, avg 260m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 166 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ARCTICA and ARIES) maintained close proximity (min 258m, avg 260m) for 166 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 59.908391399999999293868313543498516082763671875,
            "lon": 30.229316699999998263592715375125408172607421875
        },
        "time_window": {
            "start_ts": "2026-09-21T10:07:23+00:00",
            "end_ts": "2026-09-21T12:53:04+00:00"
        },
        "searched_at": "2026-09-21T16:45:02.140833+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 392.6000000000000227373675443232059478759765625,
    "points_in_zone": 59,
    "first_point": {
        "ts": "2026-09-21T10:54:13+00:00",
        "lat": 59.9089967000000029884176910854876041412353515625,
        "lon": 30.2301250000000010231815394945442676544189453125
    },
    "last_point": {
        "ts": "2026-09-21T17:26:49+00:00",
        "lat": 59.909026699999998299972503446042537689208984375,
        "lon": 30.230083300000000434692992712371051311492919921875
    }
}

{
    "radius_m": 16.300000000000000710542735760100185871124267578125,
    "duration_minutes": 392.6000000000000227373675443232059478759765625,
    "points": 59,
    "centroid": {
        "lat": 59.90898926440674898685756488703191280364990234375,
        "lon": 30.230081440677967208330301218666136264801025390625
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    "bbox": {
        "min_lat": 59.90887169999999883884811424650251865386962890625,
        "min_lon": 30.229890000000001037960828398354351520538330078125,
        "max_lat": 59.9090817000000015468685887753963470458984375,
        "max_lon": 30.230306699999999864303390495479106903076171875
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    "zone_id": "russia_ust_luga_approach"
}

{
    "vessel_a": {
        "mmsi": 273333320,
        "imo": 6920147,
        "name": "ARCTICA",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273538310,
        "imo": 7802110,
        "name": "ARIES",
        "flag": "Russia"
    },
    "min_distance_m": 245.69999999999998863131622783839702606201171875,
    "avg_distance_m": 260,
    "distance_consistency_m": 3,
    "duration_minutes": 198.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 11930,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-09-21T09:34:14+00:00",
        "end": "2026-09-21T12:53:04+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 246m, avg 260m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 199 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ARCTICA and ARIES) maintained close proximity (min 246m, avg 260m) for 199 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
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    "points_in_zone": 58,
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        "ts": "2026-09-21T09:51:14+00:00",
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        "lon": 30.23006000000000170757630257867276668548583984375
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    "last_point": {
        "ts": "2026-09-21T16:29:49+00:00",
        "lat": 59.909030000000001336957211606204509735107421875,
        "lon": 30.229981699999999733563527115620672702789306640625
    }
}

{
    "radius_m": 16,
    "duration_minutes": 398.6000000000000227373675443232059478759765625,
    "points": 58,
    "centroid": {
        "lat": 59.90898755517236651257917401380836963653564453125,
        "lon": 30.23008491206896763969780295155942440032958984375
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    "bbox": {
        "min_lat": 59.90887169999999883884811424650251865386962890625,
        "min_lon": 30.229890000000001037960828398354351520538330078125,
        "max_lat": 59.9090817000000015468685887753963470458984375,
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    "zone_id": "russia_ust_luga_approach"
}