{
 "generated_utc": "2026-08-08T23:27:11Z",
 "gfs_cycle_utc": "2026-08-08T18:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 485.0,
  "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_20260808_18Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260808_18Z.geojson.gz"
 },
 "counts": {
  "flights": 31,
  "members": 9,
  "rows": 159570
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 06:43:40",
   "seed_lat": -56.79167,
   "seed_lon": 124.33334,
   "seed_alt_m": 12300.0,
   "seed_age_h": 16.61,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": -49.12343,
    "lon": 82.77139,
    "alt_m": 12348.2
   },
   "member_spread_deg": {
    "lat": 15.75,
    "lon": 83.94
   },
   "member_spread_now_deg": {
    "lat": 4.33,
    "lon": 3.06
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 22:14:17",
   "seed_lat": 54.10417,
   "seed_lon": -58.83333,
   "seed_alt_m": 12850.0,
   "seed_age_h": 1.1,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 21:45:00",
    "lat": 64.13168,
    "lon": 76.11696,
    "alt_m": 12918.9
   },
   "member_spread_deg": {
    "lat": 15.94,
    "lon": 113.61
   },
   "member_spread_now_deg": {
    "lat": 0.19,
    "lon": 0.3
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 10:39:49",
   "seed_lat": 43.125,
   "seed_lon": 58.66667,
   "seed_alt_m": 14040.0,
   "seed_age_h": 12.67,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 40.53214,
    "lon": -174.50957,
    "alt_m": 14584.8
   },
   "member_spread_deg": {
    "lat": 18.0,
    "lon": 345.47
   },
   "member_spread_now_deg": {
    "lat": 0.79,
    "lon": 2.02
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 21:49:00",
   "seed_lat": 41.47917,
   "seed_lon": -90.08333,
   "seed_alt_m": 12910.0,
   "seed_age_h": 1.52,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 21:15:00",
    "lat": 21.98019,
    "lon": -62.69188,
    "alt_m": 13084.0
   },
   "member_spread_deg": {
    "lat": 30.1,
    "lon": 138.83
   },
   "member_spread_now_deg": {
    "lat": 0.72,
    "lon": 0.53
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-27",
   "flight_id": "DG2GG-27_2026-07-04",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 22:13:00",
   "seed_lat": 23.95833,
   "seed_lon": -106.45833,
   "seed_alt_m": 13870.0,
   "seed_age_h": 1.12,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 21:45:00",
    "lat": 9.43464,
    "lon": -98.42004,
    "alt_m": 13993.5
   },
   "member_spread_deg": {
    "lat": 15.89,
    "lon": 68.96
   },
   "member_spread_now_deg": {
    "lat": 0.38,
    "lon": 0.31
   },
   "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": 114.38,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 33.69671,
    "lon": -31.61655,
    "alt_m": 13604.9
   },
   "member_spread_deg": {
    "lat": 76.37,
    "lon": 272.79
   },
   "member_spread_now_deg": {
    "lat": 47.14,
    "lon": 332.23
   },
   "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": 272.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 20.51382,
    "lon": 106.41037,
    "alt_m": 9032.4
   },
   "member_spread_deg": {
    "lat": 32.92,
    "lon": 296.84
   },
   "member_spread_now_deg": {
    "lat": 19.62,
    "lon": 140.06
   },
   "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": 255.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 75.50479,
    "lon": 57.01062,
    "alt_m": 11980.6
   },
   "member_spread_deg": {
    "lat": 37.69,
    "lon": 336.01
   },
   "member_spread_now_deg": {
    "lat": 49.93,
    "lon": 177.62
   },
   "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": 255.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 13.98208,
    "lon": -86.65415,
    "alt_m": 12733.7
   },
   "member_spread_deg": {
    "lat": 65.42,
    "lon": 185.4
   },
   "member_spread_now_deg": {
    "lat": 44.8,
    "lon": 95.53
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DN3LEO-13",
   "flight_id": "DN3LEO-13_2026-04-12",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 20:03:00",
   "seed_lat": 61.5,
   "seed_lon": -46.125,
   "seed_alt_m": 12360.0,
   "seed_age_h": 3.28,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 19:30:00",
    "lat": 49.77586,
    "lon": 53.34659,
    "alt_m": 12075.3
   },
   "member_spread_deg": {
    "lat": 27.08,
    "lon": 183.31
   },
   "member_spread_now_deg": {
    "lat": 0.11,
    "lon": 0.82
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 22:43:00",
   "seed_lat": 68.6875,
   "seed_lon": -122.54167,
   "seed_alt_m": 12820.0,
   "seed_age_h": 0.62,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 22:15:00",
    "lat": 70.84725,
    "lon": -76.35797,
    "alt_m": 12336.2
   },
   "member_spread_deg": {
    "lat": 12.82,
    "lon": 53.58
   },
   "member_spread_now_deg": {
    "lat": 0.07,
    "lon": 0.19
   },
   "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": 45.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 9.95111,
    "lon": 157.20201,
    "alt_m": 13525.6
   },
   "member_spread_deg": {
    "lat": 51.57,
    "lon": 357.65
   },
   "member_spread_now_deg": {
    "lat": 19.35,
    "lon": 357.78
   },
   "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": 304.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 28.07539,
    "lon": -128.13444,
    "alt_m": 13129.1
   },
   "member_spread_deg": {
    "lat": 73.21,
    "lon": 279.12
   },
   "member_spread_now_deg": {
    "lat": 70.54,
    "lon": 264.6
   },
   "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 22:57:03",
   "seed_lat": 56.66667,
   "seed_lon": -51.79167,
   "seed_alt_m": 13380.0,
   "seed_age_h": 0.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 23:00:00",
    "lat": 73.91304,
    "lon": 51.86406,
    "alt_m": 13193.0
   },
   "member_spread_deg": {
    "lat": 16.81,
    "lon": 84.92
   },
   "member_spread_now_deg": {
    "lat": 0.08,
    "lon": 0.25
   },
   "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": 278.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 56.61652,
    "lon": -38.3001,
    "alt_m": 12968.3
   },
   "member_spread_deg": {
    "lat": 52.27,
    "lon": 262.3
   },
   "member_spread_now_deg": {
    "lat": 27.31,
    "lon": 210.76
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC5TRB-1",
   "flight_id": "KC5TRB-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 16:45:43",
   "seed_lat": 69.20828,
   "seed_lon": -32.66664,
   "seed_alt_m": 12600.0,
   "seed_age_h": 6.57,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 62.38515,
    "lon": 44.18714,
    "alt_m": 12450.8
   },
   "member_spread_deg": {
    "lat": 25.41,
    "lon": 108.68
   },
   "member_spread_now_deg": {
    "lat": 0.98,
    "lon": 0.62
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KD7FXO-1",
   "flight_id": "KD7FXO-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 20:45:00",
   "seed_lat": 35.77083,
   "seed_lon": -40.20833,
   "seed_alt_m": 13070.0,
   "seed_age_h": 2.58,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 20:15:00",
    "lat": 41.70561,
    "lon": 12.94186,
    "alt_m": 12894.5
   },
   "member_spread_deg": {
    "lat": 9.71,
    "lon": 55.42
   },
   "member_spread_now_deg": {
    "lat": 0.44,
    "lon": 0.67
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 22:21:00",
   "seed_lat": 62.70833,
   "seed_lon": -100.58333,
   "seed_alt_m": 12140.0,
   "seed_age_h": 0.98,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 21:45:00",
    "lat": 63.5794,
    "lon": -8.35622,
    "alt_m": 12236.6
   },
   "member_spread_deg": {
    "lat": 23.69,
    "lon": 65.91
   },
   "member_spread_now_deg": {
    "lat": 0.12,
    "lon": 0.27
   },
   "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": 36.23,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 28.11206,
    "lon": -145.24153,
    "alt_m": 12576.0
   },
   "member_spread_deg": {
    "lat": 23.47,
    "lon": 311.59
   },
   "member_spread_now_deg": {
    "lat": 15.06,
    "lon": 33.14
   },
   "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": 168.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 1.59991,
    "lon": -72.28622,
    "alt_m": 12358.0
   },
   "member_spread_deg": {
    "lat": 30.65,
    "lon": 81.38
   },
   "member_spread_now_deg": {
    "lat": 15.88,
    "lon": 12.58
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "KI6DS-11",
   "flight_id": "KI6DS-11_2026-02-03",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 20:25:45",
   "seed_lat": 60.58328,
   "seed_lon": -38.08331,
   "seed_alt_m": 13240.0,
   "seed_age_h": 2.91,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 20:00:00",
    "lat": 70.98047,
    "lon": 118.42121,
    "alt_m": 13254.3
   },
   "member_spread_deg": {
    "lat": 18.64,
    "lon": 94.19
   },
   "member_spread_now_deg": {
    "lat": 0.8,
    "lon": 0.68
   },
   "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": 322.56,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 42.24208,
    "lon": -80.02421,
    "alt_m": 12216.4
   },
   "member_spread_deg": {
    "lat": 46.61,
    "lon": 332.78
   },
   "member_spread_now_deg": {
    "lat": 55.45,
    "lon": 329.69
   },
   "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": 322.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 70.92502,
    "lon": -16.13029,
    "alt_m": 13349.9
   },
   "member_spread_deg": {
    "lat": 79.55,
    "lon": 272.0
   },
   "member_spread_now_deg": {
    "lat": 40.31,
    "lon": 303.68
   },
   "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 06:48:00",
   "seed_lat": 63.0,
   "seed_lon": 153.125,
   "seed_alt_m": 15660.0,
   "seed_age_h": 16.53,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 22.79956,
    "lon": 173.28566,
    "alt_m": 16346.8
   },
   "member_spread_deg": {
    "lat": 73.16,
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   },
   "member_spread_now_deg": {
    "lat": 6.61,
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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": 196.47,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 64.46963,
    "lon": -107.64334,
    "alt_m": 13042.9
   },
   "member_spread_deg": {
    "lat": 32.72,
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   },
   "member_spread_now_deg": {
    "lat": 27.38,
    "lon": 310.25
   },
   "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": 115.24,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 50.2161,
    "lon": 40.77106,
    "alt_m": 12655.6
   },
   "member_spread_deg": {
    "lat": 25.87,
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   },
   "member_spread_now_deg": {
    "lat": 21.51,
    "lon": 352.39
   },
   "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": 19.15,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 36.17,
    "lon": 145.4295,
    "alt_m": 13497.4
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   "member_spread_deg": {
    "lat": 20.18,
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   },
   "member_spread_now_deg": {
    "lat": 1.55,
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   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "W0RBO-12",
   "flight_id": "W0RBO-12_2026-05-02",
   "payload_type": "WSPR",
   "seed_time": "2026-08-08 12:02:53",
   "seed_lat": 45.06245,
   "seed_lon": 63.33336,
   "seed_alt_m": 13480.0,
   "seed_age_h": 11.29,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": 34.91416,
    "lon": 169.8445,
    "alt_m": 13811.3
   },
   "member_spread_deg": {
    "lat": 22.48,
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   },
   "member_spread_now_deg": {
    "lat": 2.98,
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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,
   "seed_alt_m": 11370.0,
   "seed_age_h": 322.5,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": 52.9215,
    "lon": 42.0302,
    "alt_m": 11408.0
   },
   "member_spread_deg": {
    "lat": 78.57,
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   },
   "member_spread_now_deg": {
    "lat": 73.68,
    "lon": 305.97
   },
   "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": 210.77,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-15 17:30:00",
    "lat": -26.64426,
    "lon": -174.15036,
    "alt_m": 12517.1
   },
   "member_spread_deg": {
    "lat": 23.47,
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   },
   "member_spread_now_deg": {
    "lat": 24.3,
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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": 296.0,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-15 17:45:00",
    "lat": -3.15871,
    "lon": -21.18577,
    "alt_m": 13084.8
   },
   "member_spread_deg": {
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   },
   "member_spread_now_deg": {
    "lat": 27.66,
    "lon": 254.42
   },
   "display_as": "region",
   "display_reason": "member_spread"
  }
 ]
}