{
 "generated_utc": "2026-08-07T05:27:32Z",
 "gfs_cycle_utc": "2026-08-07T00:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 491.5,
  "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_20260807_00Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260807_00Z.geojson.gz"
 },
 "counts": {
  "flights": 34,
  "members": 9,
  "rows": 179649
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 04:53:40",
   "seed_lat": -57.9375,
   "seed_lon": 68.00001,
   "seed_alt_m": 12480.0,
   "seed_age_h": 0.44,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 05:00:00",
    "lat": -52.89806,
    "lon": -38.89296,
    "alt_m": 12133.1
   },
   "member_spread_deg": {
    "lat": 23.98,
    "lon": 25.49
   },
   "member_spread_now_deg": {
    "lat": 0.1,
    "lon": 0.25
   },
   "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": 323.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 57.9103,
    "lon": -148.98495,
    "alt_m": 12835.9
   },
   "member_spread_deg": {
    "lat": 57.02,
    "lon": 261.35
   },
   "member_spread_now_deg": {
    "lat": 47.05,
    "lon": 137.09
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 02:00:18",
   "seed_lat": 53.25,
   "seed_lon": -109.0,
   "seed_alt_m": 12710.0,
   "seed_age_h": 3.33,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 01:30:00",
    "lat": 47.73055,
    "lon": 47.25493,
    "alt_m": 12559.3
   },
   "member_spread_deg": {
    "lat": 21.13,
    "lon": 58.35
   },
   "member_spread_now_deg": {
    "lat": 0.88,
    "lon": 1.3
   },
   "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": 20.08,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 43.76739,
    "lon": -170.45347,
    "alt_m": 14202.5
   },
   "member_spread_deg": {
    "lat": 34.08,
    "lon": 341.96
   },
   "member_spread_now_deg": {
    "lat": 6.17,
    "lon": 6.75
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 01:39:00",
   "seed_lat": 37.8125,
   "seed_lon": -149.33333,
   "seed_alt_m": 13020.0,
   "seed_age_h": 3.68,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 01:15:00",
    "lat": 47.17593,
    "lon": 35.90147,
    "alt_m": 12742.7
   },
   "member_spread_deg": {
    "lat": 32.7,
    "lon": 95.29
   },
   "member_spread_now_deg": {
    "lat": 0.48,
    "lon": 2.04
   },
   "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": 309.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 73.73464,
    "lon": 35.12558,
    "alt_m": 12355.7
   },
   "member_spread_deg": {
    "lat": 35.07,
    "lon": 317.53
   },
   "member_spread_now_deg": {
    "lat": 39.17,
    "lon": 222.01
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DG2GG-27",
   "flight_id": "DG2GG-27_2026-07-04",
   "payload_type": "WSPR",
   "seed_time": "2026-08-06 22:53:00",
   "seed_lat": 37.4375,
   "seed_lon": -100.95833,
   "seed_alt_m": 13850.0,
   "seed_age_h": 6.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 31.12177,
    "lon": -114.65901,
    "alt_m": 14057.6
   },
   "member_spread_deg": {
    "lat": 35.39,
    "lon": 59.33
   },
   "member_spread_now_deg": {
    "lat": 0.7,
    "lon": 1.05
   },
   "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": 72.38,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 22.82509,
    "lon": -106.68413,
    "alt_m": 13551.5
   },
   "member_spread_deg": {
    "lat": 82.8,
    "lon": 308.97
   },
   "member_spread_now_deg": {
    "lat": 26.93,
    "lon": 34.01
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "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": 230.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 32.82732,
    "lon": 66.7508,
    "alt_m": 9085.4
   },
   "member_spread_deg": {
    "lat": 39.07,
    "lon": 265.73
   },
   "member_spread_now_deg": {
    "lat": 34.37,
    "lon": 136.85
   },
   "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": 301.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 51.92925,
    "lon": 25.38796,
    "alt_m": 8709.8
   },
   "member_spread_deg": {
    "lat": 43.45,
    "lon": 346.62
   },
   "member_spread_now_deg": {
    "lat": 39.79,
    "lon": 329.28
   },
   "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": 213.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 55.42456,
    "lon": 81.07281,
    "alt_m": 12190.2
   },
   "member_spread_deg": {
    "lat": 46.57,
    "lon": 290.7
   },
   "member_spread_now_deg": {
    "lat": 48.79,
    "lon": 125.83
   },
   "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": 213.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 23.63093,
    "lon": -91.172,
    "alt_m": 12771.2
   },
   "member_spread_deg": {
    "lat": 43.93,
    "lon": 157.91
   },
   "member_spread_now_deg": {
    "lat": 37.34,
    "lon": 60.16
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DN3LEO-13",
   "flight_id": "DN3LEO-13_2026-04-12",
   "payload_type": "WSPR",
   "seed_time": "2026-08-06 17:53:00",
   "seed_lat": 83.8125,
   "seed_lon": -34.54167,
   "seed_alt_m": 12120.0,
   "seed_age_h": 11.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 66.20749,
    "lon": 15.02601,
    "alt_m": 12187.7
   },
   "member_spread_deg": {
    "lat": 27.46,
    "lon": 224.19
   },
   "member_spread_now_deg": {
    "lat": 5.71,
    "lon": 6.43
   },
   "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": 329.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 68.00496,
    "lon": -102.43049,
    "alt_m": 15049.7
   },
   "member_spread_deg": {
    "lat": 23.53,
    "lon": 350.92
   },
   "member_spread_now_deg": {
    "lat": 31.29,
    "lon": 345.28
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 02:03:00",
   "seed_lat": 62.85417,
   "seed_lon": -131.95833,
   "seed_alt_m": 12900.0,
   "seed_age_h": 3.28,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 01:30:00",
    "lat": 64.50278,
    "lon": -105.71543,
    "alt_m": 12923.0
   },
   "member_spread_deg": {
    "lat": 20.37,
    "lon": 151.56
   },
   "member_spread_now_deg": {
    "lat": 0.19,
    "lon": 1.24
   },
   "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": 3.41,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 01:30:00",
    "lat": 28.35333,
    "lon": -144.99877,
    "alt_m": 13484.3
   },
   "member_spread_deg": {
    "lat": 35.73,
    "lon": 343.42
   },
   "member_spread_now_deg": {
    "lat": 1.75,
    "lon": 2.23
   },
   "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": 262.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 35.0918,
    "lon": -160.96253,
    "alt_m": 13157.8
   },
   "member_spread_deg": {
    "lat": 54.12,
    "lon": 309.18
   },
   "member_spread_now_deg": {
    "lat": 73.24,
    "lon": 283.19
   },
   "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 00:57:04",
   "seed_lat": 58.6875,
   "seed_lon": -70.875,
   "seed_alt_m": 13260.0,
   "seed_age_h": 4.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 00:30:00",
    "lat": 64.72739,
    "lon": 4.40968,
    "alt_m": 13170.2
   },
   "member_spread_deg": {
    "lat": 16.84,
    "lon": 53.91
   },
   "member_spread_now_deg": {
    "lat": 0.2,
    "lon": 2.62
   },
   "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": 236.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 56.53236,
    "lon": -147.6028,
    "alt_m": 12785.5
   },
   "member_spread_deg": {
    "lat": 39.13,
    "lon": 321.75
   },
   "member_spread_now_deg": {
    "lat": 31.5,
    "lon": 270.59
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC5TRB-1",
   "flight_id": "KC5TRB-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-06 01:55:43",
   "seed_lat": 77.04161,
   "seed_lon": 175.7917,
   "seed_alt_m": 12360.0,
   "seed_age_h": 27.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 50.16312,
    "lon": 41.27632,
    "alt_m": 12645.3
   },
   "member_spread_deg": {
    "lat": 20.04,
    "lon": 314.23
   },
   "member_spread_now_deg": {
    "lat": 24.39,
    "lon": 73.25
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KD7FXO-1",
   "flight_id": "KD7FXO-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-08-06 22:10:00",
   "seed_lat": 50.70833,
   "seed_lon": -73.83333,
   "seed_alt_m": 12630.0,
   "seed_age_h": 7.17,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 57.26098,
    "lon": 94.157,
    "alt_m": 12358.6
   },
   "member_spread_deg": {
    "lat": 35.26,
    "lon": 87.32
   },
   "member_spread_now_deg": {
    "lat": 0.58,
    "lon": 6.61
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-06 22:06:00",
   "seed_lat": 62.375,
   "seed_lon": -80.91667,
   "seed_alt_m": 12140.0,
   "seed_age_h": 7.23,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 52.52928,
    "lon": -65.96813,
    "alt_m": 12040.1
   },
   "member_spread_deg": {
    "lat": 19.1,
    "lon": 64.58
   },
   "member_spread_now_deg": {
    "lat": 0.57,
    "lon": 2.99
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE9DAB-11",
   "flight_id": "KE9DAB-11_2026-07-29",
   "payload_type": "WSPR",
   "seed_time": "2026-08-06 15:31:00",
   "seed_lat": 38.9375,
   "seed_lon": 14.83333,
   "seed_alt_m": 12250.0,
   "seed_age_h": 13.82,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 44.88547,
    "lon": 167.29367,
    "alt_m": 12441.8
   },
   "member_spread_deg": {
    "lat": 29.54,
    "lon": 328.57
   },
   "member_spread_now_deg": {
    "lat": 4.1,
    "lon": 1.26
   },
   "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,
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   "seed_age_h": 126.41,
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   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
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    "lon": -85.68514,
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   },
   "member_spread_deg": {
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   },
   "member_spread_now_deg": {
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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": "2026-08-06 19:55:45",
   "seed_lat": 74.12495,
   "seed_lon": -25.58331,
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   "levels_spanned": 2,
   "nominal_end": {
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    "lat": 74.29106,
    "lon": 117.2684,
    "alt_m": 13277.2
   },
   "member_spread_deg": {
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   },
   "member_spread_now_deg": {
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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",
   "seed_lat": 42.93908,
   "seed_lon": 39.39383,
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   "seed_age_h": 280.56,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 29.29505,
    "lon": -128.31889,
    "alt_m": 12059.1
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   "member_spread_deg": {
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   "member_spread_now_deg": {
    "lat": 54.27,
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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,
   "seed_alt_m": 13803.0,
   "seed_age_h": 280.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 53.41216,
    "lon": -76.72146,
    "alt_m": 13462.7
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   "member_spread_deg": {
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   },
   "member_spread_now_deg": {
    "lat": 47.58,
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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 04:51:00",
   "seed_lat": 56.95833,
   "seed_lon": 142.16667,
   "seed_alt_m": 15460.0,
   "seed_age_h": 0.48,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 04:15:00",
    "lat": 15.43094,
    "lon": 169.42243,
    "alt_m": 16467.0
   },
   "member_spread_deg": {
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   "member_spread_now_deg": {
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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",
   "seed_lat": 74.5625,
   "seed_lon": -160.0,
   "seed_alt_m": 12890.0,
   "seed_age_h": 154.47,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 62.06694,
    "lon": -159.87717,
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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": "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,
   "seed_alt_m": 12836.0,
   "seed_age_h": 73.24,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:30:00",
    "lat": 34.15849,
    "lon": -31.72773,
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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": "2026-08-06 10:31:00",
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   "seed_lon": 27.75,
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   "seed_age_h": 18.82,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
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    "lon": 151.0692,
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   "member_spread_deg": {
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   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "YU9OMT-1",
   "flight_id": "YU9OMT-1_2026-05-24",
   "payload_type": "WSPR",
   "seed_time": "2026-07-26 12:50:00",
   "seed_lat": 39.60417,
   "seed_lon": 35.08336,
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   "seed_age_h": 280.5,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
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    "lat": 61.19004,
    "lon": 3.19119,
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   "member_spread_deg": {
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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",
   "seed_lat": -23.70833,
   "seed_lon": 149.29167,
   "seed_alt_m": 12380.0,
   "seed_age_h": 168.77,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
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    "lat": -26.58867,
    "lon": 74.59305,
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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,
   "seed_alt_m": 13090.0,
   "seed_age_h": 254.0,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-13 23:45:00",
    "lat": 1.29021,
    "lon": -46.95904,
    "alt_m": 13152.3
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   "member_spread_deg": {
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   },
   "member_spread_now_deg": {
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    "lon": 252.7
   },
   "display_as": "region",
   "display_reason": "member_spread"
  }
 ]
}