{
 "generated_utc": "2026-08-03T05:27:15Z",
 "gfs_cycle_utc": "2026-08-03T00:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 476.5,
  "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_20260803_00Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260803_00Z.geojson.gz"
 },
 "counts": {
  "flights": 38,
  "members": 9,
  "rows": 187425
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 23:03:40",
   "seed_lat": -46.08334,
   "seed_lon": -106.24999,
   "seed_alt_m": 12240.0,
   "seed_age_h": 6.27,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": -56.17234,
    "lon": 165.34529,
    "alt_m": 12941.2
   },
   "member_spread_deg": {
    "lat": 22.42,
    "lon": 344.93
   },
   "member_spread_now_deg": {
    "lat": 0.15,
    "lon": 1.89
   },
   "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": 227.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 49.92042,
    "lon": -36.45552,
    "alt_m": 13157.3
   },
   "member_spread_deg": {
    "lat": 41.77,
    "lon": 131.88
   },
   "member_spread_now_deg": {
    "lat": 25.15,
    "lon": 331.29
   },
   "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": 17.4,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 55.52106,
    "lon": -82.93662,
    "alt_m": 12198.3
   },
   "member_spread_deg": {
    "lat": 29.67,
    "lon": 112.29
   },
   "member_spread_now_deg": {
    "lat": 7.38,
    "lon": 30.87
   },
   "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": 10.15,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 41.11309,
    "lon": 100.83165,
    "alt_m": 14358.8
   },
   "member_spread_deg": {
    "lat": 14.09,
    "lon": 113.85
   },
   "member_spread_now_deg": {
    "lat": 1.89,
    "lon": 2.78
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-03 03:16:30",
   "seed_lat": 31.72917,
   "seed_lon": -165.79167,
   "seed_alt_m": 13075.0,
   "seed_age_h": 2.06,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-10 02:45:00",
    "lat": 44.79205,
    "lon": -87.30242,
    "alt_m": 13045.6
   },
   "member_spread_deg": {
    "lat": 17.96,
    "lon": 148.64
   },
   "member_spread_now_deg": {
    "lat": 0.38,
    "lon": 0.8
   },
   "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": 213.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 62.88816,
    "lon": 14.35633,
    "alt_m": 12551.8
   },
   "member_spread_deg": {
    "lat": 18.79,
    "lon": 269.26
   },
   "member_spread_now_deg": {
    "lat": 33.45,
    "lon": 200.59
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DG2GG-27",
   "flight_id": "DG2GG-27_2026-07-04",
   "payload_type": "WSPR",
   "seed_time": "2026-08-03 01:50:30",
   "seed_lat": 20.375,
   "seed_lon": -154.25,
   "seed_alt_m": 13920.0,
   "seed_age_h": 3.49,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-10 01:15:00",
    "lat": 37.81081,
    "lon": -62.11935,
    "alt_m": 13899.9
   },
   "member_spread_deg": {
    "lat": 32.91,
    "lon": 83.81
   },
   "member_spread_now_deg": {
    "lat": 1.32,
    "lon": 1.58
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-29",
   "flight_id": "DG2GG-29_2026-07-28",
   "payload_type": "WSPR",
   "seed_time": "2026-08-03 04:47:00",
   "seed_lat": 44.16667,
   "seed_lon": 147.29167,
   "seed_alt_m": 13190.0,
   "seed_age_h": 0.55,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-10 04:45:00",
    "lat": 21.65026,
    "lon": -147.02758,
    "alt_m": 13576.7
   },
   "member_spread_deg": {
    "lat": 51.15,
    "lon": 325.93
   },
   "member_spread_now_deg": {
    "lat": 0.38,
    "lon": 0.12
   },
   "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": 134.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 28.41546,
    "lon": 2.60772,
    "alt_m": 9367.9
   },
   "member_spread_deg": {
    "lat": 28.39,
    "lon": 146.36
   },
   "member_spread_now_deg": {
    "lat": 46.65,
    "lon": 104.48
   },
   "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": 205.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 75.93337,
    "lon": -22.58618,
    "alt_m": 8538.1
   },
   "member_spread_deg": {
    "lat": 45.85,
    "lon": 286.81
   },
   "member_spread_now_deg": {
    "lat": 30.8,
    "lon": 305.28
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DL0MZ-493",
   "flight_id": "DL0MZ-493_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 07:36:01",
   "seed_lat": 64.20833,
   "seed_lon": 58.16667,
   "seed_alt_m": 12170.0,
   "seed_age_h": 117.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 52.93806,
    "lon": 39.02551,
    "alt_m": 12302.2
   },
   "member_spread_deg": {
    "lat": 65.37,
    "lon": 182.13
   },
   "member_spread_now_deg": {
    "lat": 18.09,
    "lon": 338.97
   },
   "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": 117.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 54.21181,
    "lon": 40.45615,
    "alt_m": 12276.2
   },
   "member_spread_deg": {
    "lat": 27.47,
    "lon": 176.6
   },
   "member_spread_now_deg": {
    "lat": 18.7,
    "lon": 339.14
   },
   "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": 15.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 69.72368,
    "lon": 58.72309,
    "alt_m": 11684.6
   },
   "member_spread_deg": {
    "lat": 26.99,
    "lon": 225.61
   },
   "member_spread_now_deg": {
    "lat": 3.81,
    "lon": 13.53
   },
   "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": 233.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 67.94323,
    "lon": -86.7308,
    "alt_m": 15004.9
   },
   "member_spread_deg": {
    "lat": 31.23,
    "lon": 280.3
   },
   "member_spread_now_deg": {
    "lat": 25.03,
    "lon": 256.03
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-03 03:33:00",
   "seed_lat": 50.79167,
   "seed_lon": 166.75,
   "seed_alt_m": 12930.0,
   "seed_age_h": 1.78,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-10 03:00:00",
    "lat": 41.21857,
    "lon": -37.76022,
    "alt_m": 13236.9
   },
   "member_spread_deg": {
    "lat": 43.75,
    "lon": 210.28
   },
   "member_spread_now_deg": {
    "lat": 0.39,
    "lon": 1.41
   },
   "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": 257.08,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 6.2354,
    "lon": -161.09904,
    "alt_m": 14514.1
   },
   "member_spread_deg": {
    "lat": 96.79,
    "lon": 272.35
   },
   "member_spread_now_deg": {
    "lat": 42.65,
    "lon": 312.63
   },
   "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": 14.16,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 78.56038,
    "lon": 161.83532,
    "alt_m": 12901.6
   },
   "member_spread_deg": {
    "lat": 47.99,
    "lon": 341.02
   },
   "member_spread_now_deg": {
    "lat": 3.82,
    "lon": 4.87
   },
   "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": 166.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 35.65005,
    "lon": 163.6137,
    "alt_m": 13294.1
   },
   "member_spread_deg": {
    "lat": 65.2,
    "lon": 358.56
   },
   "member_spread_now_deg": {
    "lat": 48.28,
    "lon": 356.46
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC3LBR-449",
   "flight_id": "KC3LBR-449_2026-07-06",
   "payload_type": "WSPR",
   "seed_time": "2026-08-03 04:22:33",
   "seed_lat": 61.20833,
   "seed_lon": -118.58333,
   "seed_alt_m": 13270.0,
   "seed_age_h": 0.96,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-10 04:00:00",
    "lat": 63.70838,
    "lon": 33.99548,
    "alt_m": 12993.2
   },
   "member_spread_deg": {
    "lat": 17.41,
    "lon": 93.16
   },
   "member_spread_now_deg": {
    "lat": 0.57,
    "lon": 0.58
   },
   "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": 140.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 72.50845,
    "lon": -160.92429,
    "alt_m": 13099.3
   },
   "member_spread_deg": {
    "lat": 53.86,
    "lon": 342.23
   },
   "member_spread_now_deg": {
    "lat": 7.56,
    "lon": 115.97
   },
   "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": 17.82,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 61.9439,
    "lon": -48.13976,
    "alt_m": 12602.0
   },
   "member_spread_deg": {
    "lat": 25.58,
    "lon": 205.33
   },
   "member_spread_now_deg": {
    "lat": 3.24,
    "lon": 19.74
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KD7FXO-1",
   "flight_id": "KD7FXO-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-08-03 04:20:00",
   "seed_lat": 38.91667,
   "seed_lon": -156.20833,
   "seed_alt_m": 13020.0,
   "seed_age_h": 1.0,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-10 03:45:00",
    "lat": 56.15255,
    "lon": 45.23339,
    "alt_m": 12584.1
   },
   "member_spread_deg": {
    "lat": 40.43,
    "lon": 160.29
   },
   "member_spread_now_deg": {
    "lat": 0.37,
    "lon": 0.1
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-02 23:48:30",
   "seed_lat": 53.97917,
   "seed_lon": -116.875,
   "seed_alt_m": 12230.0,
   "seed_age_h": 5.53,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 54.80207,
    "lon": -53.52911,
    "alt_m": 12581.1
   },
   "member_spread_deg": {
    "lat": 10.61,
    "lon": 103.41
   },
   "member_spread_now_deg": {
    "lat": 0.47,
    "lon": 1.68
   },
   "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": 9.98,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 46.15718,
    "lon": 74.21893,
    "alt_m": 12145.1
   },
   "member_spread_deg": {
    "lat": 17.52,
    "lon": 107.11
   },
   "member_spread_now_deg": {
    "lat": 0.88,
    "lon": 2.55
   },
   "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": 30.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 15.07561,
    "lon": -82.62223,
    "alt_m": 12372.0
   },
   "member_spread_deg": {
    "lat": 13.94,
    "lon": 26.83
   },
   "member_spread_now_deg": {
    "lat": 3.54,
    "lon": 1.48
   },
   "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": 16.74,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 60.27804,
    "lon": -102.53532,
    "alt_m": 13405.7
   },
   "member_spread_deg": {
    "lat": 19.9,
    "lon": 176.27
   },
   "member_spread_now_deg": {
    "lat": 1.49,
    "lon": 16.83
   },
   "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": 293.45,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": -5.63396,
    "lon": -132.22001,
    "alt_m": 14826.3
   },
   "member_spread_deg": {
    "lat": 52.81,
    "lon": 178.09
   },
   "member_spread_now_deg": {
    "lat": 45.57,
    "lon": 194.74
   },
   "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": 184.56,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 31.01882,
    "lon": 177.34767,
    "alt_m": 12269.8
   },
   "member_spread_deg": {
    "lat": 30.51,
    "lon": 356.07
   },
   "member_spread_now_deg": {
    "lat": 56.39,
    "lon": 102.17
   },
   "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": 184.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 74.17187,
    "lon": -44.73714,
    "alt_m": 13447.4
   },
   "member_spread_deg": {
    "lat": 33.28,
    "lon": 115.96
   },
   "member_spread_now_deg": {
    "lat": 25.57,
    "lon": 60.14
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "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": 279.33,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 34.69649,
    "lon": 110.97515,
    "alt_m": 14612.6
   },
   "member_spread_deg": {
    "lat": 59.72,
    "lon": 139.3
   },
   "member_spread_now_deg": {
    "lat": 45.33,
    "lon": 130.51
   },
   "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": 16.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": 69.89712,
    "lon": 139.82153,
    "alt_m": 15192.7
   },
   "member_spread_deg": {
    "lat": 33.26,
    "lon": 327.96
   },
   "member_spread_now_deg": {
    "lat": 1.4,
    "lon": 11.86
   },
   "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": 314.05,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": -18.58672,
    "lon": 45.84133,
    "alt_m": 14109.5
   },
   "member_spread_deg": {
    "lat": 34.32,
    "lon": 287.1
   },
   "member_spread_now_deg": {
    "lat": 19.16,
    "lon": 308.2
   },
   "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": 58.47,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 69.70324,
    "lon": 150.51483,
    "alt_m": 12768.7
   },
   "member_spread_deg": {
    "lat": 31.5,
    "lon": 195.97
   },
   "member_spread_now_deg": {
    "lat": 16.12,
    "lon": 328.28
   },
   "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": 8.98,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 35.76298,
    "lon": -32.0148,
    "alt_m": 13530.6
   },
   "member_spread_deg": {
    "lat": 39.38,
    "lon": 196.19
   },
   "member_spread_now_deg": {
    "lat": 2.55,
    "lon": 3.56
   },
   "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": 310.6,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 58.67141,
    "lon": 3.66058,
    "alt_m": 12585.8
   },
   "member_spread_deg": {
    "lat": 61.07,
    "lon": 317.79
   },
   "member_spread_now_deg": {
    "lat": 58.28,
    "lon": 205.94
   },
   "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": 184.5,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 59.73128,
    "lon": -148.2251,
    "alt_m": 11634.4
   },
   "member_spread_deg": {
    "lat": 46.97,
    "lon": 321.49
   },
   "member_spread_now_deg": {
    "lat": 36.19,
    "lon": 339.79
   },
   "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": 72.77,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-09 23:30:00",
    "lat": -13.8448,
    "lon": 9.83267,
    "alt_m": 12643.0
   },
   "member_spread_deg": {
    "lat": 20.69,
    "lon": 159.25
   },
   "member_spread_now_deg": {
    "lat": 14.5,
    "lon": 69.71
   },
   "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": 158.0,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-09 23:45:00",
    "lat": 0.1177,
    "lon": -114.14248,
    "alt_m": 13112.0
   },
   "member_spread_deg": {
    "lat": 29.36,
    "lon": 252.07
   },
   "member_spread_now_deg": {
    "lat": 25.15,
    "lon": 307.59
   },
   "display_as": "region",
   "display_reason": "member_spread"
  }
 ]
}