{
 "generated_utc": "2026-08-04T23:27:44Z",
 "gfs_cycle_utc": "2026-08-04T18:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 497.5,
  "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_20260804_18Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260804_18Z.geojson.gz"
 },
 "counts": {
  "flights": 37,
  "members": 9,
  "rows": 188334
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 20:08:40",
   "seed_lat": -44.66667,
   "seed_lon": -54.54165,
   "seed_alt_m": 12600.0,
   "seed_age_h": 3.19,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 19:45:00",
    "lat": -45.50466,
    "lon": -173.65193,
    "alt_m": 12843.8
   },
   "member_spread_deg": {
    "lat": 16.78,
    "lon": 62.77
   },
   "member_spread_now_deg": {
    "lat": 0.43,
    "lon": 0.71
   },
   "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": 269.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:45:00",
    "lat": 46.4093,
    "lon": -87.36765,
    "alt_m": 13074.9
   },
   "member_spread_deg": {
    "lat": 25.74,
    "lon": 202.46
   },
   "member_spread_now_deg": {
    "lat": 45.04,
    "lon": 345.16
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 20:00:19",
   "seed_lat": 77.72917,
   "seed_lon": -128.125,
   "seed_alt_m": 12630.0,
   "seed_age_h": 3.33,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 19:30:00",
    "lat": 53.32723,
    "lon": 51.32372,
    "alt_m": 12715.0
   },
   "member_spread_deg": {
    "lat": 36.8,
    "lon": 159.85
   },
   "member_spread_now_deg": {
    "lat": 1.44,
    "lon": 1.71
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 18:55:18",
   "seed_lat": 41.97917,
   "seed_lon": -15.91667,
   "seed_alt_m": 14220.0,
   "seed_age_h": 4.41,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 18:30:00",
    "lat": 57.31377,
    "lon": 128.27568,
    "alt_m": 14006.8
   },
   "member_spread_deg": {
    "lat": 19.64,
    "lon": 52.62
   },
   "member_spread_now_deg": {
    "lat": 0.67,
    "lon": 2.31
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 22:39:00",
   "seed_lat": 25.8125,
   "seed_lon": -162.0,
   "seed_alt_m": 12970.0,
   "seed_age_h": 0.68,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 22:15:00",
    "lat": 39.49288,
    "lon": -131.84607,
    "alt_m": 13015.7
   },
   "member_spread_deg": {
    "lat": 15.31,
    "lon": 99.89
   },
   "member_spread_now_deg": {
    "lat": 0.16,
    "lon": 0.23
   },
   "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": 255.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:45:00",
    "lat": 77.45799,
    "lon": 26.12881,
    "alt_m": 12429.9
   },
   "member_spread_deg": {
    "lat": 36.97,
    "lon": 350.3
   },
   "member_spread_now_deg": {
    "lat": 47.63,
    "lon": 206.25
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DG2GG-27",
   "flight_id": "DG2GG-27_2026-07-04",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 22:03:00",
   "seed_lat": 34.77083,
   "seed_lon": -139.58333,
   "seed_alt_m": 13660.0,
   "seed_age_h": 1.28,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 21:30:00",
    "lat": 23.18733,
    "lon": -109.05371,
    "alt_m": 13928.1
   },
   "member_spread_deg": {
    "lat": 43.51,
    "lon": 71.66
   },
   "member_spread_now_deg": {
    "lat": 0.49,
    "lon": 0.34
   },
   "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": 18.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:30:00",
    "lat": 42.6635,
    "lon": -121.58265,
    "alt_m": 13433.6
   },
   "member_spread_deg": {
    "lat": 34.77,
    "lon": 97.82
   },
   "member_spread_now_deg": {
    "lat": 5.92,
    "lon": 17.87
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "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": 176.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-11 17:45:00",
    "lat": 32.98904,
    "lon": 63.52845,
    "alt_m": 9123.8
   },
   "member_spread_deg": {
    "lat": 54.72,
    "lon": 171.83
   },
   "member_spread_now_deg": {
    "lat": 37.36,
    "lon": 133.23
   },
   "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": 247.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-11 17:30:00",
    "lat": 34.032,
    "lon": -35.08593,
    "alt_m": 8674.7
   },
   "member_spread_deg": {
    "lat": 49.57,
    "lon": 326.47
   },
   "member_spread_now_deg": {
    "lat": 25.42,
    "lon": 310.32
   },
   "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": 159.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-11 17:30:00",
    "lat": 37.14397,
    "lon": -65.00638,
    "alt_m": 12733.7
   },
   "member_spread_deg": {
    "lat": 30.85,
    "lon": 220.55
   },
   "member_spread_now_deg": {
    "lat": 38.31,
    "lon": 351.85
   },
   "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": 159.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-11 17:30:00",
    "lat": 56.16301,
    "lon": -24.76308,
    "alt_m": 12114.4
   },
   "member_spread_deg": {
    "lat": 17.61,
    "lon": 165.58
   },
   "member_spread_now_deg": {
    "lat": 39.33,
    "lon": 350.58
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DN3LEO-13",
   "flight_id": "DN3LEO-13_2026-04-12",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 22:53:00",
   "seed_lat": 64.3125,
   "seed_lon": 147.54167,
   "seed_alt_m": 12080.0,
   "seed_age_h": 0.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-11 23:00:00",
    "lat": 63.49691,
    "lon": -36.71588,
    "alt_m": 12121.4
   },
   "member_spread_deg": {
    "lat": 27.67,
    "lon": 120.44
   },
   "member_spread_now_deg": {
    "lat": 0.42,
    "lon": 0.25
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DO3GU-40",
   "flight_id": "DO3GU-40_2026-06-19",
   "payload_type": "WSPR",
   "seed_time": "2026-07-24 12:15:47",
   "seed_lat": 71.20833,
   "seed_lon": 93.16667,
   "seed_alt_m": 15164.0,
   "seed_age_h": 275.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:45:00",
    "lat": 70.1542,
    "lon": -90.8131,
    "alt_m": 15051.1
   },
   "member_spread_deg": {
    "lat": 32.03,
    "lon": 333.0
   },
   "member_spread_now_deg": {
    "lat": 17.4,
    "lon": 303.68
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 22:23:00",
   "seed_lat": 72.25,
   "seed_lon": -145.79167,
   "seed_alt_m": 12920.0,
   "seed_age_h": 0.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 22:00:00",
    "lat": 30.80037,
    "lon": -79.76191,
    "alt_m": 13590.9
   },
   "member_spread_deg": {
    "lat": 36.49,
    "lon": 155.48
   },
   "member_spread_now_deg": {
    "lat": 0.18,
    "lon": 2.65
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "K0PEA-28",
   "flight_id": "K0PEA-28_2026-01-07",
   "payload_type": "WSPR",
   "seed_time": "2026-07-23 12:15:25",
   "seed_lat": 49.85411,
   "seed_lon": 24.91668,
   "seed_alt_m": 13360.0,
   "seed_age_h": 299.08,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:45:00",
    "lat": 53.12151,
    "lon": -50.95213,
    "alt_m": 13494.6
   },
   "member_spread_deg": {
    "lat": 96.16,
    "lon": 277.49
   },
   "member_spread_now_deg": {
    "lat": 38.97,
    "lon": 344.03
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "K5NOT-11",
   "flight_id": "K5NOT-11_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-03 14:10:37",
   "seed_lat": 43.77078,
   "seed_lon": 25.08333,
   "seed_alt_m": 13060.0,
   "seed_age_h": 33.16,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:45:00",
    "lat": 31.60989,
    "lon": -173.50161,
    "alt_m": 13450.6
   },
   "member_spread_deg": {
    "lat": 64.15,
    "lon": 350.81
   },
   "member_spread_now_deg": {
    "lat": 7.89,
    "lon": 15.57
   },
   "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": 208.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:30:00",
    "lat": 29.49734,
    "lon": -175.87252,
    "alt_m": 13256.8
   },
   "member_spread_deg": {
    "lat": 62.2,
    "lon": 350.58
   },
   "member_spread_now_deg": {
    "lat": 67.65,
    "lon": 322.86
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC3LBR-449",
   "flight_id": "KC3LBR-449_2026-07-06",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 22:57:04",
   "seed_lat": 51.45833,
   "seed_lon": -107.91667,
   "seed_alt_m": 13300.0,
   "seed_age_h": 0.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 23:00:00",
    "lat": 67.76559,
    "lon": 70.2613,
    "alt_m": 13305.8
   },
   "member_spread_deg": {
    "lat": 20.96,
    "lon": 167.01
   },
   "member_spread_now_deg": {
    "lat": 0.22,
    "lon": 0.1
   },
   "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": 182.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:45:00",
    "lat": 50.7492,
    "lon": -148.94778,
    "alt_m": 13107.1
   },
   "member_spread_deg": {
    "lat": 32.24,
    "lon": 347.48
   },
   "member_spread_now_deg": {
    "lat": 25.85,
    "lon": 253.55
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC5TRB-1",
   "flight_id": "KC5TRB-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 11:30:43",
   "seed_lat": 67.33328,
   "seed_lon": 65.58336,
   "seed_alt_m": 12840.0,
   "seed_age_h": 59.82,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 17:30:00",
    "lat": 66.24399,
    "lon": 61.92006,
    "alt_m": 12645.1
   },
   "member_spread_deg": {
    "lat": 51.03,
    "lon": 253.41
   },
   "member_spread_now_deg": {
    "lat": 18.7,
    "lon": 33.27
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KD7FXO-1",
   "flight_id": "KD7FXO-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 22:35:00",
   "seed_lat": 49.70833,
   "seed_lon": -137.08333,
   "seed_alt_m": 12570.0,
   "seed_age_h": 0.75,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-11 22:00:00",
    "lat": 45.12207,
    "lon": 38.42626,
    "alt_m": 12419.0
   },
   "member_spread_deg": {
    "lat": 20.35,
    "lon": 75.57
   },
   "member_spread_now_deg": {
    "lat": 0.1,
    "lon": 0.28
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 22:11:00",
   "seed_lat": 52.41667,
   "seed_lon": -94.29167,
   "seed_alt_m": 12100.0,
   "seed_age_h": 1.15,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-11 21:45:00",
    "lat": 65.71458,
    "lon": -90.04292,
    "alt_m": 12333.0
   },
   "member_spread_deg": {
    "lat": 17.16,
    "lon": 14.22
   },
   "member_spread_now_deg": {
    "lat": 0.13,
    "lon": 0.24
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
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   "flight_id": "KE9DAB-11_2026-07-29",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 17:56:00",
   "seed_lat": 40.64583,
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  },
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   "callsign": "KI1TEN-1",
   "flight_id": "KI1TEN-1_2026-07-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-01 22:55:27",
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   "seed_lon": -104.12496,
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   "nominal_end": {
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   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "KI6DS-11",
   "flight_id": "KI6DS-11_2026-02-03",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 22:55:45",
   "seed_lat": 82.93745,
   "seed_lon": -175.87498,
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   "levels_spanned": 2,
   "nominal_end": {
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   "display_as": "track",
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  },
  {
   "callsign": "N0MPM-31",
   "flight_id": "N0MPM-31_2026-04-16",
   "payload_type": "WSPR",
   "seed_time": "2026-07-21 23:53:19",
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   "seed_lon": -135.08331,
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   "nominal_end": {
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   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "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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   "nominal_end": {
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   "member_spread_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",
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   "seed_lon": 29.04891,
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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": "SP2ROC-1",
   "flight_id": "SP2ROC-1_2026-03-14",
   "payload_type": "APRS",
   "seed_time": "2026-07-22 14:00:27",
   "seed_lat": 40.10083,
   "seed_lon": 44.614,
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   "seed_age_h": 321.33,
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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": "SP2ROC-41",
   "flight_id": "SP2ROC-41_2026-01-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 09:51:00",
   "seed_lat": 63.97917,
   "seed_lon": 91.41667,
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   "seed_age_h": 13.48,
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   "nominal_end": {
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   "display_as": "track",
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  },
  {
   "callsign": "SP6MPL-34",
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   "payload_type": "WSPR",
   "seed_time": "2026-07-31 18:52:00",
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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",
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   "nominal_end": {
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  },
  {
   "callsign": "VE3VRO-36",
   "flight_id": "VE3VRO-36_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-08-04 19:16:00",
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   "seed_lon": -25.45833,
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   "nominal_end": {
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  },
  {
   "callsign": "YU9OMT-1",
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   "payload_type": "WSPR",
   "seed_time": "2026-07-26 12:50:00",
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   "display_as": "region",
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  },
  {
   "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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   "nominal_end": {
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   "display_as": "region",
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  },
  {
   "callsign": "ZS6SRC-84",
   "flight_id": "ZS6SRC-84_2026-07-12",
   "payload_type": "WSPR",
   "seed_time": "2026-07-27 15:20:00",
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   "float_reliable": true,
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   "nominal_end": {
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    "lat": -12.65732,
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   "member_spread_deg": {
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  }
 ]
}