{
 "generated_utc": "2026-08-02T17:27:29Z",
 "gfs_cycle_utc": "2026-08-02T12:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 493.5,
  "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_20260802_12Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260802_12Z.geojson.gz"
 },
 "counts": {
  "flights": 39,
  "members": 9,
  "rows": 196569
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 16:53:40",
   "seed_lat": -47.91667,
   "seed_lon": -109.83332,
   "seed_alt_m": 12300.0,
   "seed_age_h": 0.44,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 17:00:00",
    "lat": -52.346,
    "lon": 160.21913,
    "alt_m": 12980.2
   },
   "member_spread_deg": {
    "lat": 28.7,
    "lon": 22.45
   },
   "member_spread_now_deg": {
    "lat": 0.06,
    "lon": 0.14
   },
   "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": 215.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 44.7145,
    "lon": -124.067,
    "alt_m": 13526.1
   },
   "member_spread_deg": {
    "lat": 49.71,
    "lon": 116.61
   },
   "member_spread_now_deg": {
    "lat": 20.68,
    "lon": 335.21
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 11:56:18",
   "seed_lat": 65.4375,
   "seed_lon": 107.95833,
   "seed_alt_m": 12530.0,
   "seed_age_h": 5.4,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 64.88247,
    "lon": -79.78325,
    "alt_m": 12546.4
   },
   "member_spread_deg": {
    "lat": 33.36,
    "lon": 210.09
   },
   "member_spread_now_deg": {
    "lat": 2.69,
    "lon": 6.52
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 17:01:49",
   "seed_lat": 25.5,
   "seed_lon": -43.04167,
   "seed_alt_m": 14624.0,
   "seed_age_h": 0.3,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:00:00",
    "lat": 43.24181,
    "lon": 99.28414,
    "alt_m": 14256.1
   },
   "member_spread_deg": {
    "lat": 21.95,
    "lon": 133.14
   },
   "member_spread_now_deg": {
    "lat": 0.1,
    "lon": 0.06
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 03:24:00",
   "seed_lat": 28.875,
   "seed_lon": -164.0,
   "seed_alt_m": 13080.0,
   "seed_age_h": 13.93,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 43.80464,
    "lon": -135.75169,
    "alt_m": 12921.3
   },
   "member_spread_deg": {
    "lat": 17.82,
    "lon": 100.53
   },
   "member_spread_now_deg": {
    "lat": 0.52,
    "lon": 0.86
   },
   "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": 201.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 57.08325,
    "lon": 25.5691,
    "alt_m": 12919.7
   },
   "member_spread_deg": {
    "lat": 46.91,
    "lon": 259.46
   },
   "member_spread_now_deg": {
    "lat": 38.25,
    "lon": 263.12
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DG2GG-27",
   "flight_id": "DG2GG-27_2026-07-04",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 03:23:00",
   "seed_lat": 19.25,
   "seed_lon": -168.58333,
   "seed_alt_m": 14110.0,
   "seed_age_h": 13.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 27.97964,
    "lon": -51.54781,
    "alt_m": 13964.7
   },
   "member_spread_deg": {
    "lat": 56.07,
    "lon": 85.72
   },
   "member_spread_now_deg": {
    "lat": 5.33,
    "lon": 7.31
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-29",
   "flight_id": "DG2GG-29_2026-07-28",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 07:47:00",
   "seed_lat": 57.04167,
   "seed_lon": 126.25,
   "seed_alt_m": 13080.0,
   "seed_age_h": 9.55,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 48.36676,
    "lon": -103.23838,
    "alt_m": 13157.5
   },
   "member_spread_deg": {
    "lat": 61.88,
    "lon": 262.63
   },
   "member_spread_now_deg": {
    "lat": 2.63,
    "lon": 4.01
   },
   "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": 122.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 30.84826,
    "lon": 18.75047,
    "alt_m": 9135.7
   },
   "member_spread_deg": {
    "lat": 35.48,
    "lon": 135.81
   },
   "member_spread_now_deg": {
    "lat": 42.11,
    "lon": 91.61
   },
   "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": 193.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 63.21818,
    "lon": -70.01485,
    "alt_m": 8565.3
   },
   "member_spread_deg": {
    "lat": 35.68,
    "lon": 276.29
   },
   "member_spread_now_deg": {
    "lat": 27.18,
    "lon": 323.5
   },
   "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": 105.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 38.2118,
    "lon": -21.45114,
    "alt_m": 12687.0
   },
   "member_spread_deg": {
    "lat": 61.75,
    "lon": 168.12
   },
   "member_spread_now_deg": {
    "lat": 17.7,
    "lon": 356.88
   },
   "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": 105.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 41.75011,
    "lon": -25.19079,
    "alt_m": 12635.1
   },
   "member_spread_deg": {
    "lat": 26.9,
    "lon": 170.77
   },
   "member_spread_now_deg": {
    "lat": 17.14,
    "lon": 349.66
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DN3LEO-13",
   "flight_id": "DN3LEO-13_2026-04-12",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 13:23:00",
   "seed_lat": 66.9375,
   "seed_lon": 71.91667,
   "seed_alt_m": 12470.0,
   "seed_age_h": 3.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 13:00:00",
    "lat": 72.32165,
    "lon": -29.537,
    "alt_m": 12101.9
   },
   "member_spread_deg": {
    "lat": 34.28,
    "lon": 192.64
   },
   "member_spread_now_deg": {
    "lat": 0.32,
    "lon": 3.43
   },
   "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": 221.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 72.71456,
    "lon": -79.3299,
    "alt_m": 14930.0
   },
   "member_spread_deg": {
    "lat": 46.98,
    "lon": 276.64
   },
   "member_spread_now_deg": {
    "lat": 21.97,
    "lon": 246.59
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 06:53:00",
   "seed_lat": 51.125,
   "seed_lon": 151.16667,
   "seed_alt_m": 12920.0,
   "seed_age_h": 10.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 35.67701,
    "lon": -26.60504,
    "alt_m": 13330.0
   },
   "member_spread_deg": {
    "lat": 42.54,
    "lon": 77.74
   },
   "member_spread_now_deg": {
    "lat": 1.45,
    "lon": 3.44
   },
   "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": 245.08,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 48.95726,
    "lon": -68.39888,
    "alt_m": 13737.8
   },
   "member_spread_deg": {
    "lat": 81.03,
    "lon": 287.79
   },
   "member_spread_now_deg": {
    "lat": 38.27,
    "lon": 296.77
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "K5NOT-11",
   "flight_id": "K5NOT-11_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 15:10:37",
   "seed_lat": 44.83328,
   "seed_lon": 16.375,
   "seed_alt_m": 13120.0,
   "seed_age_h": 2.16,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 14:45:00",
    "lat": 43.75342,
    "lon": -172.85599,
    "alt_m": 13198.7
   },
   "member_spread_deg": {
    "lat": 34.35,
    "lon": 354.73
   },
   "member_spread_now_deg": {
    "lat": 0.51,
    "lon": 0.61
   },
   "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": 154.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 40.59453,
    "lon": 149.80682,
    "alt_m": 13091.1
   },
   "member_spread_deg": {
    "lat": 58.0,
    "lon": 306.28
   },
   "member_spread_now_deg": {
    "lat": 41.43,
    "lon": 338.13
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC3LBR-422-10",
   "flight_id": "KC3LBR-422-10_2026-01-02",
   "payload_type": "WSPR",
   "seed_time": "2026-07-19 21:57:02",
   "seed_lat": -26.39583,
   "seed_lon": -68.16667,
   "seed_alt_m": 14380.0,
   "seed_age_h": 331.38,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": -32.52652,
    "lon": -100.44659,
    "alt_m": 14401.8
   },
   "member_spread_deg": {
    "lat": 36.17,
    "lon": 230.3
   },
   "member_spread_now_deg": {
    "lat": 25.77,
    "lon": 249.25
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC3LBR-449",
   "flight_id": "KC3LBR-449_2026-07-06",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 16:57:03",
   "seed_lat": 62.5,
   "seed_lon": -121.625,
   "seed_alt_m": 13270.0,
   "seed_age_h": 0.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:00:00",
    "lat": 53.71652,
    "lon": 0.03687,
    "alt_m": 13465.2
   },
   "member_spread_deg": {
    "lat": 14.03,
    "lon": 96.32
   },
   "member_spread_now_deg": {
    "lat": 0.19,
    "lon": 0.04
   },
   "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": 128.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 72.46292,
    "lon": -147.29452,
    "alt_m": 13176.2
   },
   "member_spread_deg": {
    "lat": 32.59,
    "lon": 350.1
   },
   "member_spread_now_deg": {
    "lat": 14.05,
    "lon": 111.84
   },
   "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": 5.82,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 64.39922,
    "lon": 39.03271,
    "alt_m": 12168.4
   },
   "member_spread_deg": {
    "lat": 30.13,
    "lon": 239.79
   },
   "member_spread_now_deg": {
    "lat": 0.18,
    "lon": 4.95
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 16:46:00",
   "seed_lat": 53.54167,
   "seed_lon": -118.91667,
   "seed_alt_m": 12170.0,
   "seed_age_h": 0.57,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 16:15:00",
    "lat": 63.51851,
    "lon": -15.71341,
    "alt_m": 12326.1
   },
   "member_spread_deg": {
    "lat": 11.51,
    "lon": 118.34
   },
   "member_spread_now_deg": {
    "lat": 0.2,
    "lon": 0.38
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE9DAB-11",
   "flight_id": "KE9DAB-11_2026-07-29",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 16:46:00",
   "seed_lat": 25.35417,
   "seed_lon": -42.70833,
   "seed_alt_m": 12570.0,
   "seed_age_h": 0.57,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 16:15:00",
    "lat": 43.69325,
    "lon": 64.25348,
    "alt_m": 12164.5
   },
   "member_spread_deg": {
    "lat": 33.79,
    "lon": 112.93
   },
   "member_spread_now_deg": {
    "lat": 0.06,
    "lon": 0.08
   },
   "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": 18.41,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 16.55175,
    "lon": -87.02472,
    "alt_m": 12360.7
   },
   "member_spread_deg": {
    "lat": 16.16,
    "lon": 24.7
   },
   "member_spread_now_deg": {
    "lat": 4.03,
    "lon": 1.95
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KI6DS-11",
   "flight_id": "KI6DS-11_2026-02-03",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 12:35:45",
   "seed_lat": 70.12495,
   "seed_lon": 83.20835,
   "seed_alt_m": 13120.0,
   "seed_age_h": 4.74,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 12:00:00",
    "lat": 75.43424,
    "lon": 56.34074,
    "alt_m": 12733.0
   },
   "member_spread_deg": {
    "lat": 28.19,
    "lon": 167.96
   },
   "member_spread_now_deg": {
    "lat": 1.12,
    "lon": 4.88
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "N0MPM-31",
   "flight_id": "N0MPM-31_2026-04-16",
   "payload_type": "WSPR",
   "seed_time": "2026-07-21 23:53:19",
   "seed_lat": -24.02088,
   "seed_lon": -135.08331,
   "seed_alt_m": 14600.0,
   "seed_age_h": 281.45,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": -3.51152,
    "lon": -134.87886,
    "alt_m": 14847.3
   },
   "member_spread_deg": {
    "lat": 35.75,
    "lon": 234.21
   },
   "member_spread_now_deg": {
    "lat": 41.26,
    "lon": 341.33
   },
   "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",
   "seed_lat": 42.93908,
   "seed_lon": 39.39383,
   "seed_alt_m": 11696.0,
   "seed_age_h": 172.56,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 33.88347,
    "lon": 175.37048,
    "alt_m": 12248.3
   },
   "member_spread_deg": {
    "lat": 33.49,
    "lon": 350.43
   },
   "member_spread_now_deg": {
    "lat": 53.69,
    "lon": 70.54
   },
   "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": 172.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 73.81337,
    "lon": -56.21561,
    "alt_m": 13534.2
   },
   "member_spread_deg": {
    "lat": 40.11,
    "lon": 123.47
   },
   "member_spread_now_deg": {
    "lat": 24.66,
    "lon": 55.15
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "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,
   "seed_alt_m": 14644.0,
   "seed_age_h": 267.33,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": 38.90689,
    "lon": 98.51266,
    "alt_m": 14731.0
   },
   "member_spread_deg": {
    "lat": 63.23,
    "lon": 142.03
   },
   "member_spread_now_deg": {
    "lat": 48.27,
    "lon": 118.69
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP2ROC-41",
   "flight_id": "SP2ROC-41_2026-01-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 12:53:00",
   "seed_lat": 68.4375,
   "seed_lon": 63.41667,
   "seed_alt_m": 15460.0,
   "seed_age_h": 4.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 12:30:00",
    "lat": 56.01102,
    "lon": 150.51357,
    "alt_m": 15415.9
   },
   "member_spread_deg": {
    "lat": 26.11,
    "lon": 346.16
   },
   "member_spread_now_deg": {
    "lat": 0.08,
    "lon": 2.51
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP6MPL-32",
   "flight_id": "SP6MPL-32_2026-01-23",
   "payload_type": "WSPR",
   "seed_time": "2026-07-21 03:17:00",
   "seed_lat": -22.31248,
   "seed_lon": 162.875,
   "seed_alt_m": 14160.0,
   "seed_age_h": 302.05,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": -18.56773,
    "lon": 41.23861,
    "alt_m": 14072.5
   },
   "member_spread_deg": {
    "lat": 32.11,
    "lon": 246.46
   },
   "member_spread_now_deg": {
    "lat": 14.23,
    "lon": 286.69
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "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": 46.47,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 61.08793,
    "lon": 150.34396,
    "alt_m": 12779.1
   },
   "member_spread_deg": {
    "lat": 37.08,
    "lon": 226.66
   },
   "member_spread_now_deg": {
    "lat": 9.98,
    "lon": 246.48
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "VE3VRO-36",
   "flight_id": "VE3VRO-36_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 16:31:00",
   "seed_lat": 35.04167,
   "seed_lon": -53.125,
   "seed_alt_m": 13540.0,
   "seed_age_h": 0.82,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 16:00:00",
    "lat": 40.19055,
    "lon": -39.96422,
    "alt_m": 13406.9
   },
   "member_spread_deg": {
    "lat": 37.04,
    "lon": 186.68
   },
   "member_spread_now_deg": {
    "lat": 0.27,
    "lon": 0.29
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "W0DLK-1",
   "flight_id": "W0DLK-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-07-21 06:43:47",
   "seed_lat": 46.18745,
   "seed_lon": 121.75004,
   "seed_alt_m": 12630.0,
   "seed_age_h": 298.6,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 66.87476,
    "lon": -6.68153,
    "alt_m": 12299.7
   },
   "member_spread_deg": {
    "lat": 54.02,
    "lon": 313.74
   },
   "member_spread_now_deg": {
    "lat": 56.4,
    "lon": 201.42
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "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": 172.5,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": 48.9524,
    "lon": -70.36851,
    "alt_m": 11487.3
   },
   "member_spread_deg": {
    "lat": 52.64,
    "lon": 273.29
   },
   "member_spread_now_deg": {
    "lat": 35.81,
    "lon": 331.26
   },
   "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": 60.77,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": -12.8935,
    "lon": -2.64279,
    "alt_m": 12662.5
   },
   "member_spread_deg": {
    "lat": 29.63,
    "lon": 167.49
   },
   "member_spread_now_deg": {
    "lat": 18.63,
    "lon": 48.79
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "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": 146.0,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:45:00",
    "lat": -11.44892,
    "lon": -91.6181,
    "alt_m": 13036.4
   },
   "member_spread_deg": {
    "lat": 34.52,
    "lon": 279.72
   },
   "member_spread_now_deg": {
    "lat": 26.48,
    "lon": 355.61
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "ZS6ZU-11",
   "flight_id": "ZS6ZU-11_2026-07-17",
   "payload_type": "WSPR",
   "seed_time": "2026-07-20 01:53:00",
   "seed_lat": -22.0625,
   "seed_lon": -151.29167,
   "seed_alt_m": 13360.0,
   "seed_age_h": 327.45,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 11:30:00",
    "lat": -26.72714,
    "lon": -162.195,
    "alt_m": 13015.1
   },
   "member_spread_deg": {
    "lat": 31.29,
    "lon": 318.46
   },
   "member_spread_now_deg": {
    "lat": 10.4,
    "lon": 182.53
   },
   "display_as": "region",
   "display_reason": "member_spread"
  }
 ]
}