{
 "generated_utc": "2026-08-08T05:27:34Z",
 "gfs_cycle_utc": "2026-08-08T00:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 496.5,
  "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_20260808_00Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260808_00Z.geojson.gz"
 },
 "counts": {
  "flights": 32,
  "members": 9,
  "rows": 168642
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 04:53:40",
   "seed_lat": -56.58334,
   "seed_lon": 121.91668,
   "seed_alt_m": 12300.0,
   "seed_age_h": 0.44,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 05:00:00",
    "lat": -59.47873,
    "lon": 41.00368,
    "alt_m": 12518.9
   },
   "member_spread_deg": {
    "lat": 14.51,
    "lon": 71.15
   },
   "member_spread_now_deg": {
    "lat": 0.03,
    "lon": 0.23
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 00:10:18",
   "seed_lat": 51.52083,
   "seed_lon": -79.79167,
   "seed_alt_m": 12700.0,
   "seed_age_h": 5.16,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 45.46982,
    "lon": 47.4675,
    "alt_m": 12692.2
   },
   "member_spread_deg": {
    "lat": 21.87,
    "lon": 60.22
   },
   "member_spread_now_deg": {
    "lat": 2.1,
    "lon": 2.83
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 04:52:17",
   "seed_lat": 45.375,
   "seed_lon": 57.20833,
   "seed_alt_m": 14120.0,
   "seed_age_h": 0.46,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-15 04:15:00",
    "lat": 43.83324,
    "lon": 147.69734,
    "alt_m": 14525.1
   },
   "member_spread_deg": {
    "lat": 27.17,
    "lon": 328.13
   },
   "member_spread_now_deg": {
    "lat": 0.03,
    "lon": 0.17
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 23:49:00",
   "seed_lat": 51.29167,
   "seed_lon": -122.04167,
   "seed_alt_m": 12740.0,
   "seed_age_h": 5.52,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 33.91405,
    "lon": -39.94082,
    "alt_m": 13052.0
   },
   "member_spread_deg": {
    "lat": 30.69,
    "lon": 67.64
   },
   "member_spread_now_deg": {
    "lat": 0.82,
    "lon": 5.77
   },
   "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": 333.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 61.6885,
    "lon": 105.23775,
    "alt_m": 12788.0
   },
   "member_spread_deg": {
    "lat": 48.63,
    "lon": 333.54
   },
   "member_spread_now_deg": {
    "lat": 28.5,
    "lon": 233.17
   },
   "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 22:48:00",
   "seed_lat": 29.25,
   "seed_lon": -101.54167,
   "seed_alt_m": 13860.0,
   "seed_age_h": 6.53,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 18.3854,
    "lon": -111.61599,
    "alt_m": 13934.7
   },
   "member_spread_deg": {
    "lat": 42.26,
    "lon": 61.78
   },
   "member_spread_now_deg": {
    "lat": 1.92,
    "lon": 1.21
   },
   "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": 96.38,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 39.71844,
    "lon": -38.43237,
    "alt_m": 13756.0
   },
   "member_spread_deg": {
    "lat": 76.53,
    "lon": 285.63
   },
   "member_spread_now_deg": {
    "lat": 41.74,
    "lon": 339.15
   },
   "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": 254.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 38.47546,
    "lon": 115.91655,
    "alt_m": 8982.1
   },
   "member_spread_deg": {
    "lat": 52.27,
    "lon": 349.17
   },
   "member_spread_now_deg": {
    "lat": 19.06,
    "lon": 133.83
   },
   "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": 325.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 40.76917,
    "lon": 30.86339,
    "alt_m": 8664.2
   },
   "member_spread_deg": {
    "lat": 43.19,
    "lon": 279.76
   },
   "member_spread_now_deg": {
    "lat": 51.88,
    "lon": 340.02
   },
   "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": 237.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 87.7234,
    "lon": -56.2236,
    "alt_m": 12005.4
   },
   "member_spread_deg": {
    "lat": 47.95,
    "lon": 224.29
   },
   "member_spread_now_deg": {
    "lat": 57.18,
    "lon": 163.85
   },
   "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": 237.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 27.46166,
    "lon": -70.53992,
    "alt_m": 12814.5
   },
   "member_spread_deg": {
    "lat": 56.91,
    "lon": 226.47
   },
   "member_spread_now_deg": {
    "lat": 50.52,
    "lon": 71.54
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DN3LEO-13",
   "flight_id": "DN3LEO-13_2026-04-12",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 19:53:00",
   "seed_lat": 68.97917,
   "seed_lon": -43.25,
   "seed_alt_m": 12290.0,
   "seed_age_h": 9.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 62.5414,
    "lon": 48.90134,
    "alt_m": 12117.7
   },
   "member_spread_deg": {
    "lat": 22.6,
    "lon": 52.96
   },
   "member_spread_now_deg": {
    "lat": 0.57,
    "lon": 1.74
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 01:23:00",
   "seed_lat": 66.16667,
   "seed_lon": -130.79167,
   "seed_alt_m": 12920.0,
   "seed_age_h": 3.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 01:00:00",
    "lat": 65.5696,
    "lon": -104.43401,
    "alt_m": 12760.7
   },
   "member_spread_deg": {
    "lat": 38.02,
    "lon": 167.73
   },
   "member_spread_now_deg": {
    "lat": 0.58,
    "lon": 0.72
   },
   "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": 27.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 25.84204,
    "lon": -168.7944,
    "alt_m": 13505.8
   },
   "member_spread_deg": {
    "lat": 39.16,
    "lon": 344.55
   },
   "member_spread_now_deg": {
    "lat": 5.77,
    "lon": 357.77
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "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": 286.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 27.61841,
    "lon": -147.47951,
    "alt_m": 13248.7
   },
   "member_spread_deg": {
    "lat": 60.08,
    "lon": 325.71
   },
   "member_spread_now_deg": {
    "lat": 73.18,
    "lon": 265.9
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC3LBR-449",
   "flight_id": "KC3LBR-449_2026-07-06",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 00:04:33",
   "seed_lat": 60.125,
   "seed_lon": -58.29167,
   "seed_alt_m": 13380.0,
   "seed_age_h": 5.26,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 69.16782,
    "lon": 33.84486,
    "alt_m": 13150.4
   },
   "member_spread_deg": {
    "lat": 21.77,
    "lon": 57.06
   },
   "member_spread_now_deg": {
    "lat": 0.5,
    "lon": 1.49
   },
   "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": 260.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 46.73278,
    "lon": -64.40902,
    "alt_m": 12967.2
   },
   "member_spread_deg": {
    "lat": 38.41,
    "lon": 289.71
   },
   "member_spread_now_deg": {
    "lat": 26.44,
    "lon": 306.6
   },
   "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 16:15:43",
   "seed_lat": 78.12495,
   "seed_lon": -23.5833,
   "seed_alt_m": 12540.0,
   "seed_age_h": 13.07,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 73.26557,
    "lon": 30.84597,
    "alt_m": 12220.8
   },
   "member_spread_deg": {
    "lat": 13.13,
    "lon": 115.48
   },
   "member_spread_now_deg": {
    "lat": 3.5,
    "lon": 4.43
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KD7FXO-1",
   "flight_id": "KD7FXO-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 20:40:00",
   "seed_lat": 48.39583,
   "seed_lon": -46.25,
   "seed_alt_m": 12850.0,
   "seed_age_h": 8.67,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 43.08096,
    "lon": 44.54785,
    "alt_m": 12667.6
   },
   "member_spread_deg": {
    "lat": 13.89,
    "lon": 95.44
   },
   "member_spread_now_deg": {
    "lat": 4.87,
    "lon": 1.32
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 23:21:00",
   "seed_lat": 64.91667,
   "seed_lon": -91.33333,
   "seed_alt_m": 12140.0,
   "seed_age_h": 5.98,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 63.66655,
    "lon": -6.08076,
    "alt_m": 12229.9
   },
   "member_spread_deg": {
    "lat": 18.0,
    "lon": 91.25
   },
   "member_spread_now_deg": {
    "lat": 0.14,
    "lon": 1.66
   },
   "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": 18.23,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 39.97578,
    "lon": 173.99637,
    "alt_m": 12397.7
   },
   "member_spread_deg": {
    "lat": 35.3,
    "lon": 353.39
   },
   "member_spread_now_deg": {
    "lat": 5.08,
    "lon": 17.37
   },
   "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": 150.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 7.15931,
    "lon": -79.00522,
    "alt_m": 12336.0
   },
   "member_spread_deg": {
    "lat": 22.04,
    "lon": 78.88
   },
   "member_spread_now_deg": {
    "lat": 16.34,
    "lon": 8.43
   },
   "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 20:55:45",
   "seed_lat": 66.89578,
   "seed_lon": -36.87498,
   "seed_alt_m": 13120.0,
   "seed_age_h": 8.41,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 78.28299,
    "lon": 98.75577,
    "alt_m": 13307.6
   },
   "member_spread_deg": {
    "lat": 36.09,
    "lon": 319.31
   },
   "member_spread_now_deg": {
    "lat": 4.06,
    "lon": 1.91
   },
   "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,
   "seed_alt_m": 11696.0,
   "seed_age_h": 304.56,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 46.71642,
    "lon": -123.74404,
    "alt_m": 12141.0
   },
   "member_spread_deg": {
    "lat": 53.21,
    "lon": 303.32
   },
   "member_spread_now_deg": {
    "lat": 57.29,
    "lon": 335.43
   },
   "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": 304.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 63.49572,
    "lon": -57.42511,
    "alt_m": 13272.3
   },
   "member_spread_deg": {
    "lat": 64.14,
    "lon": 239.48
   },
   "member_spread_now_deg": {
    "lat": 39.99,
    "lon": 243.68
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP2ROC-41",
   "flight_id": "SP2ROC-41_2026-01-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 04:26:00",
   "seed_lat": 62.6875,
   "seed_lon": 151.54167,
   "seed_alt_m": 15700.0,
   "seed_age_h": 0.9,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-15 04:00:00",
    "lat": 13.32844,
    "lon": 162.39734,
    "alt_m": 16605.7
   },
   "member_spread_deg": {
    "lat": 67.09,
    "lon": 328.97
   },
   "member_spread_now_deg": {
    "lat": 0.21,
    "lon": 0.52
   },
   "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": 178.47,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 58.10707,
    "lon": -109.14373,
    "alt_m": 13276.2
   },
   "member_spread_deg": {
    "lat": 28.48,
    "lon": 354.08
   },
   "member_spread_now_deg": {
    "lat": 24.9,
    "lon": 319.37
   },
   "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": 97.24,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": 24.31911,
    "lon": -63.308,
    "alt_m": 13312.4
   },
   "member_spread_deg": {
    "lat": 22.4,
    "lon": 261.27
   },
   "member_spread_now_deg": {
    "lat": 29.42,
    "lon": 345.71
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "VE3VRO-36",
   "flight_id": "VE3VRO-36_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 04:11:00",
   "seed_lat": 42.47917,
   "seed_lon": 63.20833,
   "seed_alt_m": 13050.0,
   "seed_age_h": 1.15,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 03:45:00",
    "lat": 36.05924,
    "lon": -140.42023,
    "alt_m": 13465.5
   },
   "member_spread_deg": {
    "lat": 23.22,
    "lon": 344.98
   },
   "member_spread_now_deg": {
    "lat": 0.02,
    "lon": 0.2
   },
   "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,
   "seed_alt_m": 11370.0,
   "seed_age_h": 304.5,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": 56.81404,
    "lon": 3.57633,
    "alt_m": 11488.8
   },
   "member_spread_deg": {
    "lat": 78.4,
    "lon": 184.82
   },
   "member_spread_now_deg": {
    "lat": 67.29,
    "lon": 308.35
   },
   "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": 192.77,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 23:30:00",
    "lat": -7.0868,
    "lon": 36.38214,
    "alt_m": 12668.1
   },
   "member_spread_deg": {
    "lat": 28.95,
    "lon": 315.63
   },
   "member_spread_now_deg": {
    "lat": 24.1,
    "lon": 121.02
   },
   "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": 278.0,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:45:00",
    "lat": -7.20503,
    "lon": -25.4197,
    "alt_m": 13133.3
   },
   "member_spread_deg": {
    "lat": 32.34,
    "lon": 188.2
   },
   "member_spread_now_deg": {
    "lat": 27.27,
    "lon": 250.66
   },
   "display_as": "region",
   "display_reason": "member_spread"
  }
 ]
}