{
 "generated_utc": "2026-08-07T23:27:33Z",
 "gfs_cycle_utc": "2026-08-07T18:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 490.5,
  "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_20260807_18Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260807_18Z.geojson.gz"
 },
 "counts": {
  "flights": 32,
  "members": 9,
  "rows": 167085
 },
 "flights": [
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 09:53:40",
   "seed_lat": -59.6875,
   "seed_lon": 84.25001,
   "seed_alt_m": 12420.0,
   "seed_age_h": 13.44,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": -42.51602,
    "lon": -8.09005,
    "alt_m": 12099.6
   },
   "member_spread_deg": {
    "lat": 10.35,
    "lon": 141.63
   },
   "member_spread_now_deg": {
    "lat": 8.05,
    "lon": 2.09
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 22:52:48",
   "seed_lat": 51.04167,
   "seed_lon": -81.33333,
   "seed_alt_m": 12700.0,
   "seed_age_h": 0.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:00:00",
    "lat": 51.67191,
    "lon": 41.6907,
    "alt_m": 12703.7
   },
   "member_spread_deg": {
    "lat": 20.54,
    "lon": 66.47
   },
   "member_spread_now_deg": {
    "lat": 0.2,
    "lon": 0.22
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-08-06 09:15:03",
   "seed_lat": 58.04167,
   "seed_lon": 26.125,
   "seed_alt_m": 13940.0,
   "seed_age_h": 38.08,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 41.34614,
    "lon": 135.65669,
    "alt_m": 14402.8
   },
   "member_spread_deg": {
    "lat": 35.64,
    "lon": 286.4
   },
   "member_spread_now_deg": {
    "lat": 9.15,
    "lon": 3.74
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 20:04:00",
   "seed_lat": 49.70833,
   "seed_lon": -129.125,
   "seed_alt_m": 12650.0,
   "seed_age_h": 3.27,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 19:30:00",
    "lat": 52.86869,
    "lon": 21.20102,
    "alt_m": 12837.4
   },
   "member_spread_deg": {
    "lat": 24.09,
    "lon": 75.75
   },
   "member_spread_now_deg": {
    "lat": 0.75,
    "lon": 4.01
   },
   "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": 327.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 78.11258,
    "lon": -54.25859,
    "alt_m": 12582.7
   },
   "member_spread_deg": {
    "lat": 36.32,
    "lon": 333.69
   },
   "member_spread_now_deg": {
    "lat": 27.42,
    "lon": 229.89
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DG2GG-27",
   "flight_id": "DG2GG-27_2026-07-04",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 22:23:00",
   "seed_lat": 29.33333,
   "seed_lon": -101.33333,
   "seed_alt_m": 13840.0,
   "seed_age_h": 0.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 22:00:00",
    "lat": 18.73636,
    "lon": -110.28064,
    "alt_m": 13978.5
   },
   "member_spread_deg": {
    "lat": 39.46,
    "lon": 55.71
   },
   "member_spread_now_deg": {
    "lat": 0.28,
    "lon": 0.23
   },
   "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": 90.38,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 39.56005,
    "lon": -37.65973,
    "alt_m": 13786.1
   },
   "member_spread_deg": {
    "lat": 66.05,
    "lon": 234.1
   },
   "member_spread_now_deg": {
    "lat": 38.28,
    "lon": 342.0
   },
   "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": 248.65,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 30.21164,
    "lon": 62.58989,
    "alt_m": 9040.3
   },
   "member_spread_deg": {
    "lat": 35.26,
    "lon": 346.25
   },
   "member_spread_now_deg": {
    "lat": 19.44,
    "lon": 132.47
   },
   "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": 319.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 56.129,
    "lon": 25.58678,
    "alt_m": 8683.8
   },
   "member_spread_deg": {
    "lat": 47.07,
    "lon": 316.92
   },
   "member_spread_now_deg": {
    "lat": 49.66,
    "lon": 335.82
   },
   "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": 231.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 65.48956,
    "lon": 99.84698,
    "alt_m": 12361.3
   },
   "member_spread_deg": {
    "lat": 37.07,
    "lon": 275.69
   },
   "member_spread_now_deg": {
    "lat": 54.62,
    "lon": 150.99
   },
   "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": 231.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 41.15066,
    "lon": -35.89404,
    "alt_m": 12874.6
   },
   "member_spread_deg": {
    "lat": 33.45,
    "lon": 167.67
   },
   "member_spread_now_deg": {
    "lat": 44.16,
    "lon": 62.18
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DN3LEO-13",
   "flight_id": "DN3LEO-13_2026-04-12",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 19:53:00",
   "seed_lat": 68.97917,
   "seed_lon": -43.25,
   "seed_alt_m": 12290.0,
   "seed_age_h": 3.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 19:30:00",
    "lat": 71.9602,
    "lon": -13.10513,
    "alt_m": 11827.6
   },
   "member_spread_deg": {
    "lat": 19.14,
    "lon": 109.05
   },
   "member_spread_now_deg": {
    "lat": 0.35,
    "lon": 1.1
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 22:18:00",
   "seed_lat": 65.8125,
   "seed_lon": -131.5,
   "seed_alt_m": 12950.0,
   "seed_age_h": 1.03,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 21:45:00",
    "lat": 63.6969,
    "lon": -118.47651,
    "alt_m": 12884.2
   },
   "member_spread_deg": {
    "lat": 32.9,
    "lon": 297.13
   },
   "member_spread_now_deg": {
    "lat": 0.17,
    "lon": 0.11
   },
   "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": 21.41,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 21.40048,
    "lon": -161.54463,
    "alt_m": 13509.5
   },
   "member_spread_deg": {
    "lat": 31.66,
    "lon": 354.08
   },
   "member_spread_now_deg": {
    "lat": 4.42,
    "lon": 25.58
   },
   "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": 280.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 23.5029,
    "lon": -173.99125,
    "alt_m": 13198.3
   },
   "member_spread_deg": {
    "lat": 55.81,
    "lon": 349.86
   },
   "member_spread_now_deg": {
    "lat": 73.33,
    "lon": 269.03
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC3LBR-449",
   "flight_id": "KC3LBR-449_2026-07-06",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 22:57:03",
   "seed_lat": 60.3125,
   "seed_lon": -58.5,
   "seed_alt_m": 13400.0,
   "seed_age_h": 0.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 23:00:00",
    "lat": 54.75486,
    "lon": 39.82041,
    "alt_m": 13510.6
   },
   "member_spread_deg": {
    "lat": 18.86,
    "lon": 63.69
   },
   "member_spread_now_deg": {
    "lat": 0.03,
    "lon": 0.14
   },
   "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": 254.2,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 40.25271,
    "lon": -76.72469,
    "alt_m": 13277.4
   },
   "member_spread_deg": {
    "lat": 42.11,
    "lon": 274.51
   },
   "member_spread_now_deg": {
    "lat": 35.43,
    "lon": 298.35
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC5TRB-1",
   "flight_id": "KC5TRB-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 16:15:43",
   "seed_lat": 78.12495,
   "seed_lon": -23.5833,
   "seed_alt_m": 12540.0,
   "seed_age_h": 7.07,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 66.21291,
    "lon": 103.04896,
    "alt_m": 12739.4
   },
   "member_spread_deg": {
    "lat": 22.96,
    "lon": 97.02
   },
   "member_spread_now_deg": {
    "lat": 2.13,
    "lon": 1.05
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KD7FXO-1",
   "flight_id": "KD7FXO-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 20:40:00",
   "seed_lat": 48.39583,
   "seed_lon": -46.25,
   "seed_alt_m": 12850.0,
   "seed_age_h": 2.67,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 20:15:00",
    "lat": 43.00524,
    "lon": 31.98684,
    "alt_m": 12708.4
   },
   "member_spread_deg": {
    "lat": 8.74,
    "lon": 86.95
   },
   "member_spread_now_deg": {
    "lat": 0.88,
    "lon": 0.9
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 22:51:00",
   "seed_lat": 64.875,
   "seed_lon": -91.16667,
   "seed_alt_m": 12140.0,
   "seed_age_h": 0.48,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 22:15:00",
    "lat": 55.89049,
    "lon": -52.53288,
    "alt_m": 12107.2
   },
   "member_spread_deg": {
    "lat": 18.42,
    "lon": 51.6
   },
   "member_spread_now_deg": {
    "lat": 0.02,
    "lon": 0.26
   },
   "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": 12.23,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 41.53828,
    "lon": 138.17418,
    "alt_m": 12431.4
   },
   "member_spread_deg": {
    "lat": 26.52,
    "lon": 348.61
   },
   "member_spread_now_deg": {
    "lat": 3.23,
    "lon": 11.13
   },
   "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": 144.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 9.82764,
    "lon": -77.30527,
    "alt_m": 12362.1
   },
   "member_spread_deg": {
    "lat": 22.12,
    "lon": 87.69
   },
   "member_spread_now_deg": {
    "lat": 16.62,
    "lon": 7.9
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "KI6DS-11",
   "flight_id": "KI6DS-11_2026-02-03",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 20:55:45",
   "seed_lat": 66.89578,
   "seed_lon": -36.87498,
   "seed_alt_m": 13120.0,
   "seed_age_h": 2.41,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 20:30:00",
    "lat": 80.84701,
    "lon": 55.97937,
    "alt_m": 13123.3
   },
   "member_spread_deg": {
    "lat": 25.78,
    "lon": 278.16
   },
   "member_spread_now_deg": {
    "lat": 1.13,
    "lon": 1.84
   },
   "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": 298.56,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 17.58703,
    "lon": -179.54949,
    "alt_m": 12231.4
   },
   "member_spread_deg": {
    "lat": 50.66,
    "lon": 355.54
   },
   "member_spread_now_deg": {
    "lat": 58.09,
    "lon": 332.16
   },
   "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": 298.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 66.47739,
    "lon": -17.70366,
    "alt_m": 13463.0
   },
   "member_spread_deg": {
    "lat": 59.6,
    "lon": 284.68
   },
   "member_spread_now_deg": {
    "lat": 44.03,
    "lon": 270.06
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP2ROC-41",
   "flight_id": "SP2ROC-41_2026-01-25",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 22:46:00",
   "seed_lat": 61.60417,
   "seed_lon": 148.70833,
   "seed_alt_m": 15600.0,
   "seed_age_h": 0.57,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 22:15:00",
    "lat": 53.94623,
    "lon": -124.88083,
    "alt_m": 15610.7
   },
   "member_spread_deg": {
    "lat": 64.52,
    "lon": 304.74
   },
   "member_spread_now_deg": {
    "lat": 0.1,
    "lon": 0.21
   },
   "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": 172.47,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 57.61077,
    "lon": -115.364,
    "alt_m": 13064.1
   },
   "member_spread_deg": {
    "lat": 29.04,
    "lon": 330.07
   },
   "member_spread_now_deg": {
    "lat": 23.29,
    "lon": 212.31
   },
   "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": 91.24,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 31.03536,
    "lon": -56.58876,
    "alt_m": 13346.1
   },
   "member_spread_deg": {
    "lat": 22.92,
    "lon": 257.75
   },
   "member_spread_now_deg": {
    "lat": 29.22,
    "lon": 348.35
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "VE3VRO-36",
   "flight_id": "VE3VRO-36_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-08-07 12:36:00",
   "seed_lat": 47.83333,
   "seed_lon": 58.66667,
   "seed_alt_m": 13160.0,
   "seed_age_h": 10.73,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 42.75172,
    "lon": 179.09401,
    "alt_m": 13232.2
   },
   "member_spread_deg": {
    "lat": 24.79,
    "lon": 341.61
   },
   "member_spread_now_deg": {
    "lat": 0.64,
    "lon": 3.16
   },
   "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": 298.5,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": 58.13347,
    "lon": -117.98101,
    "alt_m": 11384.6
   },
   "member_spread_deg": {
    "lat": 72.68,
    "lon": 258.23
   },
   "member_spread_now_deg": {
    "lat": 70.68,
    "lon": 315.09
   },
   "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": 186.77,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-14 17:30:00",
    "lat": 2.27964,
    "lon": 30.92201,
    "alt_m": 12696.5
   },
   "member_spread_deg": {
    "lat": 38.49,
    "lon": 230.13
   },
   "member_spread_now_deg": {
    "lat": 23.71,
    "lon": 117.93
   },
   "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": 272.0,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-14 17:45:00",
    "lat": -3.11545,
    "lon": -31.85708,
    "alt_m": 13152.0
   },
   "member_spread_deg": {
    "lat": 32.69,
    "lon": 311.02
   },
   "member_spread_now_deg": {
    "lat": 26.79,
    "lon": 250.37
   },
   "display_as": "region",
   "display_reason": "member_spread"
  }
 ]
}