{
 "generated_utc": "2026-08-02T23:27:24Z",
 "gfs_cycle_utc": "2026-08-02T18:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 495.5,
  "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_18Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260802_18Z.geojson.gz"
 },
 "counts": {
  "flights": 38,
  "members": 9,
  "rows": 190287
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 22:48:40",
   "seed_lat": -46.125,
   "seed_lon": -106.41665,
   "seed_alt_m": 12240.0,
   "seed_age_h": 0.52,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 22:15:00",
    "lat": -51.20187,
    "lon": 169.6162,
    "alt_m": 12940.0
   },
   "member_spread_deg": {
    "lat": 29.26,
    "lon": 343.67
   },
   "member_spread_now_deg": {
    "lat": 0.02,
    "lon": 0.15
   },
   "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": 221.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 53.96839,
    "lon": -96.24566,
    "alt_m": 12799.0
   },
   "member_spread_deg": {
    "lat": 32.76,
    "lon": 205.95
   },
   "member_spread_now_deg": {
    "lat": 23.27,
    "lon": 334.26
   },
   "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": 11.4,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 71.98913,
    "lon": -55.65214,
    "alt_m": 12720.2
   },
   "member_spread_deg": {
    "lat": 20.02,
    "lon": 106.16
   },
   "member_spread_now_deg": {
    "lat": 5.84,
    "lon": 16.71
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 19:11:20",
   "seed_lat": 25.33333,
   "seed_lon": -43.04167,
   "seed_alt_m": 14603.0,
   "seed_age_h": 4.15,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 18:45:00",
    "lat": 46.38491,
    "lon": 92.89524,
    "alt_m": 14291.0
   },
   "member_spread_deg": {
    "lat": 13.01,
    "lon": 123.59
   },
   "member_spread_now_deg": {
    "lat": 0.64,
    "lon": 0.69
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 21:19:00",
   "seed_lat": 32.02083,
   "seed_lon": -163.29167,
   "seed_alt_m": 13060.0,
   "seed_age_h": 2.02,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 20:45:00",
    "lat": 21.95876,
    "lon": -143.74069,
    "alt_m": 13061.5
   },
   "member_spread_deg": {
    "lat": 26.68,
    "lon": 120.14
   },
   "member_spread_now_deg": {
    "lat": 0.09,
    "lon": 0.62
   },
   "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": 207.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 67.27878,
    "lon": 24.60873,
    "alt_m": 12476.6
   },
   "member_spread_deg": {
    "lat": 17.44,
    "lon": 267.59
   },
   "member_spread_now_deg": {
    "lat": 37.17,
    "lon": 218.36
   },
   "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 21:58:00",
   "seed_lat": 20.8125,
   "seed_lon": -156.41667,
   "seed_alt_m": 13980.0,
   "seed_age_h": 1.37,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-09 21:30:00",
    "lat": 20.14502,
    "lon": -104.76904,
    "alt_m": 14039.4
   },
   "member_spread_deg": {
    "lat": 37.43,
    "lon": 85.96
   },
   "member_spread_now_deg": {
    "lat": 0.44,
    "lon": 0.61
   },
   "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": 15.55,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 23.0466,
    "lon": -142.22318,
    "alt_m": 13442.4
   },
   "member_spread_deg": {
    "lat": 55.76,
    "lon": 305.34
   },
   "member_spread_now_deg": {
    "lat": 6.53,
    "lon": 5.01
   },
   "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": 128.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 30.25639,
    "lon": 13.71887,
    "alt_m": 9207.6
   },
   "member_spread_deg": {
    "lat": 34.22,
    "lon": 114.46
   },
   "member_spread_now_deg": {
    "lat": 44.25,
    "lon": 97.8
   },
   "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": 199.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 74.25906,
    "lon": -21.58375,
    "alt_m": 8583.1
   },
   "member_spread_deg": {
    "lat": 38.56,
    "lon": 336.55
   },
   "member_spread_now_deg": {
    "lat": 29.69,
    "lon": 316.65
   },
   "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": 111.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 58.72159,
    "lon": 17.38027,
    "alt_m": 12015.2
   },
   "member_spread_deg": {
    "lat": 27.43,
    "lon": 183.97
   },
   "member_spread_now_deg": {
    "lat": 17.56,
    "lon": 333.66
   },
   "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": 111.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 61.49406,
    "lon": 39.19838,
    "alt_m": 11919.1
   },
   "member_spread_deg": {
    "lat": 42.44,
    "lon": 190.77
   },
   "member_spread_now_deg": {
    "lat": 16.95,
    "lon": 333.8
   },
   "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": 9.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 63.38742,
    "lon": -29.97148,
    "alt_m": 12150.4
   },
   "member_spread_deg": {
    "lat": 19.82,
    "lon": 180.82
   },
   "member_spread_now_deg": {
    "lat": 1.64,
    "lon": 9.49
   },
   "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": 227.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 73.49554,
    "lon": -72.65392,
    "alt_m": 15061.8
   },
   "member_spread_deg": {
    "lat": 40.38,
    "lon": 292.76
   },
   "member_spread_now_deg": {
    "lat": 22.97,
    "lon": 250.83
   },
   "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 20:18:00",
   "seed_lat": 49.5,
   "seed_lon": 158.16667,
   "seed_alt_m": 12930.0,
   "seed_age_h": 3.03,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 19:45:00",
    "lat": 65.55411,
    "lon": -66.85148,
    "alt_m": 12735.7
   },
   "member_spread_deg": {
    "lat": 32.91,
    "lon": 168.87
   },
   "member_spread_now_deg": {
    "lat": 0.43,
    "lon": 0.48
   },
   "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": 251.08,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 44.83039,
    "lon": -60.14759,
    "alt_m": 13865.6
   },
   "member_spread_deg": {
    "lat": 92.04,
    "lon": 280.03
   },
   "member_spread_now_deg": {
    "lat": 40.82,
    "lon": 304.2
   },
   "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": 8.16,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 38.86375,
    "lon": -178.024,
    "alt_m": 13199.6
   },
   "member_spread_deg": {
    "lat": 36.27,
    "lon": 335.27
   },
   "member_spread_now_deg": {
    "lat": 2.34,
    "lon": 2.69
   },
   "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": 160.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 35.5409,
    "lon": 150.89482,
    "alt_m": 13125.9
   },
   "member_spread_deg": {
    "lat": 65.87,
    "lon": 336.15
   },
   "member_spread_now_deg": {
    "lat": 45.18,
    "lon": 338.21
   },
   "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 22:57:03",
   "seed_lat": 62.1875,
   "seed_lon": -120.5,
   "seed_alt_m": 13340.0,
   "seed_age_h": 0.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:00:00",
    "lat": 61.7508,
    "lon": 39.44406,
    "alt_m": 13173.5
   },
   "member_spread_deg": {
    "lat": 18.28,
    "lon": 95.23
   },
   "member_spread_now_deg": {
    "lat": 0.23,
    "lon": 0.28
   },
   "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": 134.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 71.36492,
    "lon": -168.95664,
    "alt_m": 13055.7
   },
   "member_spread_deg": {
    "lat": 42.39,
    "lon": 356.61
   },
   "member_spread_now_deg": {
    "lat": 10.35,
    "lon": 109.59
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC5TRB-1",
   "flight_id": "KC5TRB-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 11:30:43",
   "seed_lat": 67.33328,
   "seed_lon": 65.58336,
   "seed_alt_m": 12840.0,
   "seed_age_h": 11.82,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 59.86458,
    "lon": -6.90405,
    "alt_m": 12544.9
   },
   "member_spread_deg": {
    "lat": 44.4,
    "lon": 165.7
   },
   "member_spread_now_deg": {
    "lat": 0.93,
    "lon": 12.72
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 22:23:30",
   "seed_lat": 53.97917,
   "seed_lon": -117.25,
   "seed_alt_m": 12200.0,
   "seed_age_h": 0.94,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 22:00:00",
    "lat": 56.29234,
    "lon": -99.21567,
    "alt_m": 12146.5
   },
   "member_spread_deg": {
    "lat": 10.91,
    "lon": 156.68
   },
   "member_spread_now_deg": {
    "lat": 0.12,
    "lon": 0.81
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE9DAB-11",
   "flight_id": "KE9DAB-11_2026-07-29",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 19:21:00",
   "seed_lat": 24.83333,
   "seed_lon": -42.70833,
   "seed_alt_m": 12560.0,
   "seed_age_h": 3.98,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 18:45:00",
    "lat": 39.41699,
    "lon": 66.79659,
    "alt_m": 12230.8
   },
   "member_spread_deg": {
    "lat": 15.49,
    "lon": 110.69
   },
   "member_spread_now_deg": {
    "lat": 0.31,
    "lon": 0.63
   },
   "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": 24.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 12.17406,
    "lon": -84.4414,
    "alt_m": 12400.7
   },
   "member_spread_deg": {
    "lat": 19.49,
    "lon": 29.51
   },
   "member_spread_now_deg": {
    "lat": 3.64,
    "lon": 2.45
   },
   "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": 10.74,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 59.58557,
    "lon": 7.59106,
    "alt_m": 13020.6
   },
   "member_spread_deg": {
    "lat": 29.29,
    "lon": 102.2
   },
   "member_spread_now_deg": {
    "lat": 1.5,
    "lon": 11.29
   },
   "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": 287.45,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": -6.59433,
    "lon": -137.83171,
    "alt_m": 14863.4
   },
   "member_spread_deg": {
    "lat": 41.34,
    "lon": 186.9
   },
   "member_spread_now_deg": {
    "lat": 43.18,
    "lon": 343.62
   },
   "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": 178.56,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 42.4402,
    "lon": 173.1009,
    "alt_m": 12207.0
   },
   "member_spread_deg": {
    "lat": 32.12,
    "lon": 338.65
   },
   "member_spread_now_deg": {
    "lat": 55.41,
    "lon": 83.75
   },
   "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": 178.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 73.11257,
    "lon": -41.49261,
    "alt_m": 13584.5
   },
   "member_spread_deg": {
    "lat": 46.87,
    "lon": 112.73
   },
   "member_spread_now_deg": {
    "lat": 26.4,
    "lon": 57.26
   },
   "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": 273.33,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 36.78132,
    "lon": 109.40876,
    "alt_m": 14625.7
   },
   "member_spread_deg": {
    "lat": 57.51,
    "lon": 121.84
   },
   "member_spread_now_deg": {
    "lat": 45.73,
    "lon": 125.38
   },
   "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": 10.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": 51.91163,
    "lon": 155.683,
    "alt_m": 15584.6
   },
   "member_spread_deg": {
    "lat": 39.96,
    "lon": 335.88
   },
   "member_spread_now_deg": {
    "lat": 0.37,
    "lon": 6.89
   },
   "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": 308.05,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": -18.96155,
    "lon": 41.28975,
    "alt_m": 14112.1
   },
   "member_spread_deg": {
    "lat": 36.98,
    "lon": 256.18
   },
   "member_spread_now_deg": {
    "lat": 16.53,
    "lon": 296.73
   },
   "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": 52.47,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 59.87619,
    "lon": 147.52316,
    "alt_m": 12930.8
   },
   "member_spread_deg": {
    "lat": 37.19,
    "lon": 171.0
   },
   "member_spread_now_deg": {
    "lat": 12.77,
    "lon": 255.8
   },
   "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 20:21:00",
   "seed_lat": 35.39583,
   "seed_lon": -52.04167,
   "seed_alt_m": 13560.0,
   "seed_age_h": 2.98,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 19:45:00",
    "lat": 55.43675,
    "lon": 97.6597,
    "alt_m": 12972.4
   },
   "member_spread_deg": {
    "lat": 49.5,
    "lon": 195.67
   },
   "member_spread_now_deg": {
    "lat": 0.75,
    "lon": 0.72
   },
   "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": 304.6,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 57.13474,
    "lon": -95.07167,
    "alt_m": 12170.1
   },
   "member_spread_deg": {
    "lat": 41.54,
    "lon": 307.09
   },
   "member_spread_now_deg": {
    "lat": 56.97,
    "lon": 204.18
   },
   "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": 178.5,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": 49.73631,
    "lon": -115.36973,
    "alt_m": 11483.9
   },
   "member_spread_deg": {
    "lat": 77.02,
    "lon": 151.92
   },
   "member_spread_now_deg": {
    "lat": 36.4,
    "lon": 330.13
   },
   "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": 66.77,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": -13.98673,
    "lon": 2.39648,
    "alt_m": 12652.4
   },
   "member_spread_deg": {
    "lat": 24.76,
    "lon": 167.25
   },
   "member_spread_now_deg": {
    "lat": 16.6,
    "lon": 66.97
   },
   "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": 152.0,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:45:00",
    "lat": -4.71999,
    "lon": -100.88401,
    "alt_m": 13129.5
   },
   "member_spread_deg": {
    "lat": 30.85,
    "lon": 269.96
   },
   "member_spread_now_deg": {
    "lat": 23.68,
    "lon": 344.28
   },
   "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": 333.45,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 17:30:00",
    "lat": -29.52203,
    "lon": -147.08406,
    "alt_m": 12947.8
   },
   "member_spread_deg": {
    "lat": 30.09,
    "lon": 324.16
   },
   "member_spread_now_deg": {
    "lat": 10.84,
    "lon": 178.5
   },
   "display_as": "region",
   "display_reason": "member_spread"
  }
 ]
}