{
 "generated_utc": "2026-08-07T17:27:55Z",
 "gfs_cycle_utc": "2026-08-07T12:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 498.0,
  "output_interval_min": 30,
  "integration_step_s": 900,
  "wind_field_interval_h": 3
 },
 "staleness": {
  "fresh_seed_max_h": 24.0,
  "served_until_h": 336.0,
  "track_max_age_h": 72.0,
  "region_spread_deg": 60.0,
  "note": "A trajectory is served for 336 h after the last real fix and then the flight disappears. That matches the archive's own bridging limit: 23% of flights go quiet for over a week and are then heard again, so a shorter window drops balloons that are still flying. Past dead_reckoned flights the balloon has not been heard from since seed_time, so its present position is a prediction too -- the silent period is reconstructed from GFS analyses of weather that has already happened, which is why wind_source distinguishes analysis from forecast. Use display_as, not seed_age_h, to decide how to draw a flight: 'track' means the members still agree and a line is meaningful, 'region' means draw the member envelope instead because the nominal member is no better than any other."
 },
 "members": {
  "offsets_m": [
   -2000,
   -1500,
   -1000,
   -500,
   0,
   500,
   1000,
   1500,
   2000
  ],
  "nominal_offset_m": 0,
  "note": "Each member is seeded at the last observed altitude plus its offset and then conserves the density it started with. The ladder is a sensitivity fan, not a probability distribution: adjacent members diverge by roughly 1,200 km over seven days. levels_spanned reports how many GFS levels the fan actually straddles, usually 2 or 3."
 },
 "files": {
  "trajectories_csv_gz": "PBA_forecast_20260807_12Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260807_12Z.geojson.gz"
 },
 "counts": {
  "flights": 33,
  "members": 9,
  "rows": 173835
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 09:53:40",
   "seed_lat": -59.6875,
   "seed_lon": 84.25001,
   "seed_alt_m": 12420.0,
   "seed_age_h": 7.44,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": -42.07891,
    "lon": -9.40895,
    "alt_m": 12166.0
   },
   "member_spread_deg": {
    "lat": 8.74,
    "lon": 34.55
   },
   "member_spread_now_deg": {
    "lat": 4.08,
    "lon": 0.99
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS52",
   "flight_id": "BSS52_2025-12-25",
   "payload_type": "WSPR",
   "seed_time": "2026-07-24 17:39:48",
   "seed_lat": 59.97917,
   "seed_lon": 4.08333,
   "seed_alt_m": 13000.0,
   "seed_age_h": 335.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 11:45:00",
    "lat": 57.82272,
    "lon": -143.20912,
    "alt_m": 13093.6
   },
   "member_spread_deg": {
    "lat": 34.26,
    "lon": 265.12
   },
   "member_spread_now_deg": {
    "lat": 47.01,
    "lon": 123.92
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:57:18",
   "seed_lat": 49.27083,
   "seed_lon": -88.41667,
   "seed_alt_m": 12730.0,
   "seed_age_h": 0.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:00:00",
    "lat": 67.08186,
    "lon": 48.10092,
    "alt_m": 12367.2
   },
   "member_spread_deg": {
    "lat": 16.49,
    "lon": 46.23
   },
   "member_spread_now_deg": {
    "lat": 0.11,
    "lon": 0.26
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-06 09:15:03",
   "seed_lat": 58.04167,
   "seed_lon": 26.125,
   "seed_alt_m": 13940.0,
   "seed_age_h": 32.08,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-14 11:45:00",
    "lat": 39.31823,
    "lon": 161.30444,
    "alt_m": 14345.3
   },
   "member_spread_deg": {
    "lat": 25.07,
    "lon": 325.07
   },
   "member_spread_now_deg": {
    "lat": 8.46,
    "lon": 4.26
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:34:00",
   "seed_lat": 46.89583,
   "seed_lon": -135.08333,
   "seed_alt_m": 12680.0,
   "seed_age_h": 0.77,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 16:00:00",
    "lat": 54.54255,
    "lon": 18.17738,
    "alt_m": 12721.8
   },
   "member_spread_deg": {
    "lat": 33.09,
    "lon": 79.57
   },
   "member_spread_now_deg": {
    "lat": 0.57,
    "lon": 0.98
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-25",
   "flight_id": "DG2GG-25_2026-06-15",
   "payload_type": "WSPR",
   "seed_time": "2026-07-25 07:22:00",
   "seed_lat": 68.97917,
   "seed_lon": 68.16667,
   "seed_alt_m": 12990.0,
   "seed_age_h": 321.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 11:45:00",
    "lat": 84.31843,
    "lon": -60.37757,
    "alt_m": 12921.7
   },
   "member_spread_deg": {
    "lat": 42.02,
    "lon": 325.56
   },
   "member_spread_now_deg": {
    "lat": 32.12,
    "lon": 227.62
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DG2GG-27",
   "flight_id": "DG2GG-27_2026-07-04",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:08:00",
   "seed_lat": 31.625,
   "seed_lon": -99.33333,
   "seed_alt_m": 13810.0,
   "seed_age_h": 1.2,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 15:45:00",
    "lat": 3.62458,
    "lon": -124.8259,
    "alt_m": 13940.3
   },
   "member_spread_deg": {
    "lat": 40.72,
    "lon": 56.55
   },
   "member_spread_now_deg": {
    "lat": 0.18,
    "lon": 0.08
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-29",
   "flight_id": "DG2GG-29_2026-07-28",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 04:57:00",
   "seed_lat": 46.91667,
   "seed_lon": 165.25,
   "seed_alt_m": 13380.0,
   "seed_age_h": 84.38,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": 25.06252,
    "lon": -107.42867,
    "alt_m": 13607.4
   },
   "member_spread_deg": {
    "lat": 69.26,
    "lon": 235.93
   },
   "member_spread_now_deg": {
    "lat": 35.22,
    "lon": 346.26
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DJ2DS-34",
   "flight_id": "DJ2DS-34_2026-04-22",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 14:41:00",
   "seed_lat": 30.70833,
   "seed_lon": -70.5,
   "seed_alt_m": 9190.0,
   "seed_age_h": 242.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-14 11:45:00",
    "lat": 29.12886,
    "lon": 61.60358,
    "alt_m": 9064.0
   },
   "member_spread_deg": {
    "lat": 38.61,
    "lon": 358.18
   },
   "member_spread_now_deg": {
    "lat": 22.41,
    "lon": 131.7
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DL0MMZ",
   "flight_id": "DL0MMZ_2026-07-24",
   "payload_type": "OTHER",
   "seed_time": "2026-07-25 15:59:04",
   "seed_lat": 36.60802,
   "seed_lon": 30.46457,
   "seed_alt_m": 8441.0,
   "seed_age_h": 313.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": 45.21003,
    "lon": 1.98719,
    "alt_m": 8786.8
   },
   "member_spread_deg": {
    "lat": 35.67,
    "lon": 307.46
   },
   "member_spread_now_deg": {
    "lat": 45.23,
    "lon": 332.56
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DL0MZ-493",
   "flight_id": "DL0MZ-493_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 07:36:01",
   "seed_lat": 64.20833,
   "seed_lon": 58.16667,
   "seed_alt_m": 12170.0,
   "seed_age_h": 225.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": 80.46917,
    "lon": 91.87149,
    "alt_m": 12147.1
   },
   "member_spread_deg": {
    "lat": 46.51,
    "lon": 341.3
   },
   "member_spread_now_deg": {
    "lat": 51.95,
    "lon": 141.64
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DL0MZ-493e",
   "flight_id": "DL0MZ-493e_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 07:27:02",
   "seed_lat": 64.15625,
   "seed_lon": 58.08889,
   "seed_alt_m": 12170.0,
   "seed_age_h": 225.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": 16.28224,
    "lon": -93.80773,
    "alt_m": 12753.6
   },
   "member_spread_deg": {
    "lat": 59.87,
    "lon": 166.58
   },
   "member_spread_now_deg": {
    "lat": 38.26,
    "lon": 58.66
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "DN3LEO-13",
   "flight_id": "DN3LEO-13_2026-04-12",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:53:00",
   "seed_lat": 70.0625,
   "seed_lon": -41.29167,
   "seed_alt_m": 12300.0,
   "seed_age_h": 0.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 17:00:00",
    "lat": 65.98748,
    "lon": -99.57846,
    "alt_m": 12220.9
   },
   "member_spread_deg": {
    "lat": 21.84,
    "lon": 199.68
   },
   "member_spread_now_deg": {
    "lat": 0.08,
    "lon": 0.18
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:08:00",
   "seed_lat": 64.64583,
   "seed_lon": -132.91667,
   "seed_alt_m": 12890.0,
   "seed_age_h": 1.2,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 15:45:00",
    "lat": 71.03252,
    "lon": -133.41587,
    "alt_m": 12586.8
   },
   "member_spread_deg": {
    "lat": 32.16,
    "lon": 158.74
   },
   "member_spread_now_deg": {
    "lat": 0.09,
    "lon": 0.05
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "K5NOT-11",
   "flight_id": "K5NOT-11_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 01:55:37",
   "seed_lat": 46.16661,
   "seed_lon": 129.125,
   "seed_alt_m": 13010.0,
   "seed_age_h": 15.41,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": 33.36784,
    "lon": -142.65623,
    "alt_m": 13452.7
   },
   "member_spread_deg": {
    "lat": 38.49,
    "lon": 357.1
   },
   "member_spread_now_deg": {
    "lat": 8.51,
    "lon": 9.48
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "K9YO-23",
   "flight_id": "K9YO-23_2026-07-13",
   "payload_type": "WSPR",
   "seed_time": "2026-07-27 06:25:49",
   "seed_lat": 52.5833,
   "seed_lon": 125.16663,
   "seed_alt_m": 12840.0,
   "seed_age_h": 274.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": 28.92556,
    "lon": -152.69235,
    "alt_m": 13204.2
   },
   "member_spread_deg": {
    "lat": 69.52,
    "lon": 328.64
   },
   "member_spread_now_deg": {
    "lat": 75.16,
    "lon": 272.32
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC3LBR-449",
   "flight_id": "KC3LBR-449_2026-07-06",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:57:03",
   "seed_lat": 60.70833,
   "seed_lon": -60.95833,
   "seed_alt_m": 13350.0,
   "seed_age_h": 0.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:00:00",
    "lat": 64.82382,
    "lon": 33.14697,
    "alt_m": 13205.0
   },
   "member_spread_deg": {
    "lat": 13.09,
    "lon": 122.78
   },
   "member_spread_now_deg": {
    "lat": 0.01,
    "lon": 0.14
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KC3LBR-485",
   "flight_id": "KC3LBR-485_2026-03-19",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 09:08:18",
   "seed_lat": 50.14583,
   "seed_lon": 23.375,
   "seed_alt_m": 12850.0,
   "seed_age_h": 248.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 11:45:00",
    "lat": 42.79836,
    "lon": -65.40575,
    "alt_m": 13170.7
   },
   "member_spread_deg": {
    "lat": 42.45,
    "lon": 279.16
   },
   "member_spread_now_deg": {
    "lat": 41.74,
    "lon": 279.95
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC5TRB-1",
   "flight_id": "KC5TRB-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 15:05:43",
   "seed_lat": 78.68745,
   "seed_lon": -23.49997,
   "seed_alt_m": 12510.0,
   "seed_age_h": 2.24,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 14:30:00",
    "lat": 70.00793,
    "lon": 97.27889,
    "alt_m": 12668.4
   },
   "member_spread_deg": {
    "lat": 17.75,
    "lon": 227.87
   },
   "member_spread_now_deg": {
    "lat": 0.47,
    "lon": 0.3
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KD7FXO-1",
   "flight_id": "KD7FXO-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:10:00",
   "seed_lat": 50.39583,
   "seed_lon": -48.75,
   "seed_alt_m": 12940.0,
   "seed_age_h": 1.17,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 15:45:00",
    "lat": 43.38923,
    "lon": 34.716,
    "alt_m": 12804.0
   },
   "member_spread_deg": {
    "lat": 25.32,
    "lon": 63.94
   },
   "member_spread_now_deg": {
    "lat": 0.27,
    "lon": 0.15
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:36:00",
   "seed_lat": 64.39583,
   "seed_lon": -87.0,
   "seed_alt_m": 12100.0,
   "seed_age_h": 0.73,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 16:00:00",
    "lat": 61.44073,
    "lon": -31.29046,
    "alt_m": 12108.6
   },
   "member_spread_deg": {
    "lat": 28.93,
    "lon": 112.87
   },
   "member_spread_now_deg": {
    "lat": 0.02,
    "lon": 0.14
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE9DAB-11",
   "flight_id": "KE9DAB-11_2026-07-29",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 11:06:00",
   "seed_lat": 45.60417,
   "seed_lon": 28.54167,
   "seed_alt_m": 12090.0,
   "seed_age_h": 6.23,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": 39.59499,
    "lon": 174.83467,
    "alt_m": 12362.2
   },
   "member_spread_deg": {
    "lat": 25.56,
    "lon": 310.3
   },
   "member_spread_now_deg": {
    "lat": 1.96,
    "lon": 3.88
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KI1TEN-1",
   "flight_id": "KI1TEN-1_2026-07-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-01 22:55:27",
   "seed_lat": 23.95828,
   "seed_lon": -104.12496,
   "seed_alt_m": 12380.0,
   "seed_age_h": 138.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 11:30:00",
    "lat": 30.92442,
    "lon": -81.27942,
    "alt_m": 12395.9
   },
   "member_spread_deg": {
    "lat": 35.95,
    "lon": 69.11
   },
   "member_spread_now_deg": {
    "lat": 17.06,
    "lon": 7.23
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "KI6DS-11",
   "flight_id": "KI6DS-11_2026-02-03",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:55:45",
   "seed_lat": 67.83328,
   "seed_lon": -35.74998,
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   "nominal_end": {
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   },
   "member_spread_deg": {
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   },
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   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "PC4L-11",
   "flight_id": "PC4L-11_2026-07-16",
   "payload_type": "APRS",
   "seed_time": "2026-07-26 12:46:26",
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   "seed_lon": 39.39383,
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   "seed_age_h": 292.56,
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   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 11:45:00",
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    "lon": -139.98649,
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   },
   "member_spread_deg": {
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   "member_spread_now_deg": {
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   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP0LND-6",
   "flight_id": "SP0LND-6_2026-07-25",
   "payload_type": "APRS",
   "seed_time": "2026-07-26 13:19:17",
   "seed_lat": 44.85792,
   "seed_lon": 29.04891,
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   "seed_age_h": 292.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
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    "lat": 66.59085,
    "lon": -66.85259,
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   },
   "member_spread_deg": {
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   },
   "member_spread_now_deg": {
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   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP2ROC-41",
   "flight_id": "SP2ROC-41_2026-01-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 07:13:00",
   "seed_lat": 57.77083,
   "seed_lon": 143.0,
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   "seed_age_h": 10.12,
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   "nominal_end": {
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    "lat": 57.89836,
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   "member_spread_deg": {
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    "lat": 2.02,
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   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP6MPL-34",
   "flight_id": "SP6MPL-34_2025-12-03",
   "payload_type": "WSPR",
   "seed_time": "2026-07-31 18:52:00",
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   "seed_lon": -160.0,
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   "nominal_end": {
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   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP6MPL-9",
   "flight_id": "SP6MPL-9_2026-08-02",
   "payload_type": "APRS",
   "seed_time": "2026-08-04 04:05:45",
   "seed_lat": 45.52942,
   "seed_lon": 75.286,
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   "seed_age_h": 85.24,
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   "levels_spanned": 2,
   "nominal_end": {
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   "member_spread_deg": {
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   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "VE3VRO-36",
   "flight_id": "VE3VRO-36_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 12:36:00",
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   "seed_lon": 58.66667,
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   "nominal_end": {
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   "display_as": "track",
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  },
  {
   "callsign": "YU9OMT-1",
   "flight_id": "YU9OMT-1_2026-05-24",
   "payload_type": "WSPR",
   "seed_time": "2026-07-26 12:50:00",
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   "seed_lon": 35.08336,
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   "nominal_end": {
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   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "ZS6SRC-37",
   "flight_id": "ZS6SRC-37_2026-07-15",
   "payload_type": "WSPR",
   "seed_time": "2026-07-31 04:34:00",
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   "seed_lon": 149.29167,
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   "float_reliable": true,
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   "nominal_end": {
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   "member_spread_deg": {
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   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "ZS6SRC-84",
   "flight_id": "ZS6SRC-84_2026-07-12",
   "payload_type": "WSPR",
   "seed_time": "2026-07-27 15:20:00",
   "seed_lat": -7.75,
   "seed_lon": 8.375,
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   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
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    "lat": 7.10497,
    "lon": -56.19986,
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   "member_spread_deg": {
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   "display_as": "region",
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  }
 ]
}