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    },
    "missing": [
      "orekit_jpype not importable (ModuleNotFoundError: No module named 'orekit_jpype'); pip install 'satnogs-optical-network[od]'",
      "no JVM (JAVA_HOME unset and no 'java' on PATH)",
      "orekit-data not found (set OREKIT_DATA_PATH to the orekit-data zip or directory, or put orekit-data.zip in the working directory)"
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          "f69f9cac-6d07-5bd2-9769-4cffb2eae8e8"
        ],
        "object_norad_id": 61593,
        "positions": [
          "290.209703 62.100825",
          "291.534236 61.147927",
          "293.093740 59.930126"
        ],
        "published_observations": 0,
        "scope": "sibling-tracks",
        "sibling_track_ids": [
          5203,
          5204,
          5205
        ],
        "station_id": 4,
        "track_id": 5203
      },
      {
        "epoch": "2026-08-27T03:25:40.613164",
        "excluded_measurements": 2,
        "kind": "contradictory",
        "measurements": [
          "11096b49-3111-52e4-a90f-17e425d64a69",
          "e290fecd-cba8-549f-a604-9efff8e17813"
        ],
        "object_norad_id": 62242,
        "positions": [
          "308.104707 44.660186",
          "308.674658 44.341970"
        ],
        "published_observations": 0,
        "scope": "sibling-tracks",
        "sibling_track_ids": [
          5238,
          5239
        ],
        "station_id": 7,
        "track_id": 5238
      }
    ],
    "detail_omitted": 0,
    "epochs": 24,
    "measurements_excluded": 89,
    "note": "one epoch stated twice costs its own measurements, never the session: a repeated epoch is published once, a contradicted one is published not at all, and every excluded row is still in the parquet archive. Counted over tracks with a correlated object, which are the only tracks a TDM is written for. See docs/decisions/0004-duplicate-epochs.md",
    "tracks": 21,
    "tracks_left_without_observations": 68
  },
  "generated_at": "2026-09-22T23:46:57.514475Z",
  "generation_id": "dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1",
  "generator": "satnogs_optical_network.products",
  "iod": {
    "11": {
      "identified_lines": 736,
      "identified_tracks": 13,
      "lines": 741,
      "skipped": 0,
      "skipped_reasons": [],
      "unk_lines": 5,
      "unk_tracks": 5,
      "wide_id_tracks": 0
    },
    "4": {
      "identified_lines": 202,
      "identified_tracks": 89,
      "lines": 274,
      "skipped": 0,
      "skipped_reasons": [],
      "unk_lines": 72,
      "unk_tracks": 12,
      "wide_id_tracks": 0
    },
    "7": {
      "identified_lines": 157,
      "identified_tracks": 28,
      "lines": 210,
      "skipped": 0,
      "skipped_reasons": [],
      "unk_lines": 53,
      "unk_tracks": 51,
      "wide_id_tracks": 0
    }
  },
  "layout": {
    "generation_dir": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1",
    "measurements": "measurements.parquet",
    "note": "Resolve products through this manifest. Retained generations must not be combined with a recursive Parquet wildcard.",
    "session_dir": "session_date=2026-08-26",
    "stations": "stations",
    "tracks": "tracks.parquet"
  },
  "metrics": {
    "measurements": 1293,
    "objects": 20,
    "stations": 3,
    "tracks": 224,
    "unk_tracks": 190
  },
  "metrics_basis": "as-ingested",
  "packaging": {
    "note": "TDM file count is a packaging artifact, not a headline metric: it both overstates the claim to experts and understates the data volume (ADR 0010). tdm_observations is the count actually read back out of the published station-night TDMs and checked against the measurement rows; it is the number to compare a published file against. tdm_tracks is the number of segments across them.",
    "tdm_files": 3,
    "tdm_observations": 1006,
    "tdm_observations_expected": 1006,
    "tdm_observations_verified": true,
    "tdm_tracks": 62
  },
  "per_station": [
    {
      "epoch_collisions": 19,
      "iod": {
        "identified_lines": 202,
        "identified_tracks": 89,
        "lines": 274,
        "skipped": 0,
        "skipped_reasons": [],
        "unk_lines": 72,
        "unk_tracks": 12,
        "wide_id_tracks": 0
      },
      "iod_station_code": "4",
      "measurements": 274,
      "name": "optical-bench1",
      "objects": 20,
      "station_id": 4,
      "tdm_tracks": 89,
      "tracks": 101,
      "unk_tracks": 67
    },
    {
      "epoch_collisions": 4,
      "iod": {
        "identified_lines": 157,
        "identified_tracks": 28,
        "lines": 210,
        "skipped": 0,
        "skipped_reasons": [],
        "unk_lines": 53,
        "unk_tracks": 51,
        "wide_id_tracks": 0
      },
      "iod_station_code": "7",
      "measurements": 278,
      "name": "Drachten",
      "objects": 0,
      "station_id": 7,
      "tdm_tracks": 28,
      "tracks": 105,
      "unk_tracks": 105
    },
    {
      "epoch_collisions": 1,
      "iod": {
        "identified_lines": 736,
        "identified_tracks": 13,
        "lines": 741,
        "skipped": 0,
        "skipped_reasons": [],
        "unk_lines": 5,
        "unk_tracks": 5,
        "wide_id_tracks": 0
      },
      "iod_station_code": "11",
      "measurements": 741,
      "name": "dwingeloo",
      "objects": 0,
      "station_id": 11,
      "tdm_tracks": 13,
      "tracks": 18,
      "unk_tracks": 18
    }
  ],
  "products": [
    {
      "bytes": 9534,
      "conformance": null,
      "kind": "characterisation-station",
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/stations/station-11.json",
      "scope": "station-night",
      "scope_key": "11-2026-08-26",
      "sha256": "79bb0e1c020e3b095df2c604f9f585a2580b34260c3f4b4ca6c1d9bf1bbcecf5"
    },
    {
      "bytes": 10948,
      "conformance": null,
      "kind": "characterisation-station",
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/stations/station-4.json",
      "scope": "station-night",
      "scope_key": "4-2026-08-26",
      "sha256": "bdc58b77ef81bf609f65390ad1272b34c6924478efa3597b8cf853cfb4473855"
    },
    {
      "bytes": 9642,
      "conformance": null,
      "kind": "characterisation-station",
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/stations/station-7.json",
      "scope": "station-night",
      "scope_key": "7-2026-08-26",
      "sha256": "4581cac0e8a64a9ac72e36c35a9fe67ed35e19c1623aa18d9243c80e277db6d4"
    },
    {
      "bytes": 49647,
      "conformance": null,
      "kind": "iod-station-night",
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/iod/station-11-2026-08-26.iod",
      "scope": "station-night",
      "scope_key": "11-2026-08-26",
      "sha256": "fa70a9ff956448b6e0a8c6d538a7174f061c68cbbfcb20275b5b7e84e50a9b50"
    },
    {
      "bytes": 18358,
      "conformance": null,
      "kind": "iod-station-night",
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/iod/station-4-2026-08-26.iod",
      "scope": "station-night",
      "scope_key": "4-2026-08-26",
      "sha256": "3f4b958a89e4a3223b0c4ce0b34a415bb71702154ee49df232e74d5e3b80ecc4"
    },
    {
      "bytes": 14070,
      "conformance": null,
      "kind": "iod-station-night",
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/iod/station-7-2026-08-26.iod",
      "scope": "station-night",
      "scope_key": "7-2026-08-26",
      "sha256": "eaaa20b219f29f1ed47f5b504f21b021a8f2f0b3a6dad58ff27ce00110b5efc1"
    },
    {
      "bytes": 143789,
      "conformance": null,
      "kind": "parquet-session",
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/measurements.parquet",
      "scope": "session",
      "scope_key": "2026-08-26",
      "sha256": "b61d628a85947b8aea5245bb450195ce04e0b756e39d88c8dc904f031433db83"
    },
    {
      "bytes": 21881,
      "conformance": null,
      "kind": "parquet-tracks",
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/tracks.parquet",
      "scope": "session",
      "scope_key": "2026-08-26",
      "sha256": "534eb8c3050c577749fa2c71578e64f472d3afac08a897d771acb23d21cac49d"
    },
    {
      "bytes": 92538,
      "conformance": "SKIPPED: Orekit conformance NOT VERIFIED for station-11-2026-08-26.tdm: orekit_jpype not importable (ModuleNotFoundError: No module named 'orekit_jpype'); pip install 'satnogs-optical-network[od]'; no JVM (JAVA_HOME unset and no 'java' on PATH); orekit-data not found (set OREKIT_DATA_PATH to the orekit-data zip or directory, or put orekit-data.zip in the working directory). Offline structural check: clean.",
      "kind": "tdm-station-night",
      "observations": 733,
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/tdm/station-11-2026-08-26.tdm",
      "scope": "station-night",
      "scope_key": "11-2026-08-26",
      "sha256": "a5717ef779f36165852f0220c0d80442f22107b5ca75f9b9e25e24268b41dc90"
    },
    {
      "bytes": 36897,
      "conformance": "SKIPPED: Orekit conformance NOT VERIFIED for station-4-2026-08-26.tdm: orekit_jpype not importable (ModuleNotFoundError: No module named 'orekit_jpype'); pip install 'satnogs-optical-network[od]'; no JVM (JAVA_HOME unset and no 'java' on PATH); orekit-data not found (set OREKIT_DATA_PATH to the orekit-data zip or directory, or put orekit-data.zip in the working directory). Offline structural check: clean.",
      "kind": "tdm-station-night",
      "observations": 128,
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/tdm/station-4-2026-08-26.tdm",
      "scope": "station-night",
      "scope_key": "4-2026-08-26",
      "sha256": "6df36cfc68b60d4eac53660bc1aedfd94edad8be72fab58f817d68a2b659a076"
    },
    {
      "bytes": 33238,
      "conformance": "SKIPPED: Orekit conformance NOT VERIFIED for station-7-2026-08-26.tdm: orekit_jpype not importable (ModuleNotFoundError: No module named 'orekit_jpype'); pip install 'satnogs-optical-network[od]'; no JVM (JAVA_HOME unset and no 'java' on PATH); orekit-data not found (set OREKIT_DATA_PATH to the orekit-data zip or directory, or put orekit-data.zip in the working directory). Offline structural check: clean.",
      "kind": "tdm-station-night",
      "observations": 145,
      "path": "session_date=2026-08-26/generations/dffd9ffbe822af651ab311c63d0fa282bb07061d29b5d324416d9dcf49a6a2a1/tdm/station-7-2026-08-26.tdm",
      "scope": "station-night",
      "scope_key": "7-2026-08-26",
      "sha256": "13ad2b602fede3dca23c83a94b1e7aa2528f695acf606dde95364a81cf04e962"
    }
  ],
  "quarantined_excluded": 0,
  "station": [
    4,
    7,
    11
  ],
  "stations": [
    4,
    7,
    11
  ],
  "tdm_excluded_epoch_collisions": 89,
  "tdm_skipped_no_observations": 68,
  "tdm_skipped_unk": 94
}