{
 "generated_utc": "2026-07-29T05:27:56Z",
 "gfs_cycle_utc": "2026-07-29T00:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 471.5,
  "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_20260729_00Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260729_00Z.geojson.gz"
 },
 "counts": {
  "flights": 51,
  "members": 9,
  "rows": 255735
 },
 "flights": [
  {
   "callsign": "9A1CTF-16",
   "flight_id": "9A1CTF-16_2026-07-10",
   "payload_type": "WSPR",
   "seed_time": "2026-07-16 23:22:00",
   "seed_lat": 22.83333,
   "seed_lon": 138.79167,
   "seed_alt_m": 12180.0,
   "seed_age_h": 293.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 43.2866,
    "lon": 45.07516,
    "alt_m": 12098.1
   },
   "member_spread_deg": {
    "lat": 84.0,
    "lon": 264.27
   },
   "member_spread_now_deg": {
    "lat": 76.45,
    "lon": 317.72
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "9A1CTF-18",
   "flight_id": "9A1CTF-18_2026-07-10",
   "payload_type": "WSPR",
   "seed_time": "2026-07-16 08:00:00",
   "seed_lat": 26.92359,
   "seed_lon": 141.2035,
   "seed_alt_m": 12930.0,
   "seed_age_h": 309.33,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 13.74667,
    "lon": -24.48284,
    "alt_m": 13058.1
   },
   "member_spread_deg": {
    "lat": 52.25,
    "lon": 240.62
   },
   "member_spread_now_deg": {
    "lat": 41.86,
    "lon": 201.13
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "AE0SS-9",
   "flight_id": "AE0SS-9_2026-07-12",
   "payload_type": "APRS",
   "seed_time": "2026-07-19 01:40:35",
   "seed_lat": 33.85425,
   "seed_lon": -115.42858,
   "seed_alt_m": 14321.0,
   "seed_age_h": 243.66,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 40.40075,
    "lon": -94.874,
    "alt_m": 14145.8
   },
   "member_spread_deg": {
    "lat": 47.17,
    "lon": 128.55
   },
   "member_spread_now_deg": {
    "lat": 42.43,
    "lon": 48.86
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 04:53:40",
   "seed_lat": -51.22917,
   "seed_lon": 87.37501,
   "seed_alt_m": 12150.0,
   "seed_age_h": 0.44,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-05 05:00:00",
    "lat": -43.96058,
    "lon": -20.9084,
    "alt_m": 12613.8
   },
   "member_spread_deg": {
    "lat": 22.58,
    "lon": 166.13
   },
   "member_spread_now_deg": {
    "lat": 0.13,
    "lon": 0.26
   },
   "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": 107.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 60.90667,
    "lon": -113.21202,
    "alt_m": 12885.5
   },
   "member_spread_deg": {
    "lat": 30.92,
    "lon": 346.07
   },
   "member_spread_now_deg": {
    "lat": 27.37,
    "lon": 74.35
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 04:35:18",
   "seed_lat": 56.02083,
   "seed_lon": 3.375,
   "seed_alt_m": 12710.0,
   "seed_age_h": 0.75,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-05 04:00:00",
    "lat": 72.65097,
    "lon": -152.50334,
    "alt_m": 12678.8
   },
   "member_spread_deg": {
    "lat": 13.61,
    "lon": 330.16
   },
   "member_spread_now_deg": {
    "lat": 0.03,
    "lon": 0.15
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 00:28:47",
   "seed_lat": 46.66667,
   "seed_lon": -89.875,
   "seed_alt_m": 14080.0,
   "seed_age_h": 4.85,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-05 00:00:00",
    "lat": 24.92038,
    "lon": -38.97062,
    "alt_m": 14496.5
   },
   "member_spread_deg": {
    "lat": 32.47,
    "lon": 211.36
   },
   "member_spread_now_deg": {
    "lat": 1.77,
    "lon": 1.96
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-23",
   "flight_id": "DG2GG-23_2026-05-23",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 03:49:00",
   "seed_lat": 35.04167,
   "seed_lon": -163.625,
   "seed_alt_m": 13110.0,
   "seed_age_h": 1.52,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-05 03:15:00",
    "lat": 27.77482,
    "lon": -156.20643,
    "alt_m": 13080.5
   },
   "member_spread_deg": {
    "lat": 20.83,
    "lon": 107.89
   },
   "member_spread_now_deg": {
    "lat": 0.19,
    "lon": 0.79
   },
   "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": 93.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 77.53054,
    "lon": -37.68852,
    "alt_m": 12653.7
   },
   "member_spread_deg": {
    "lat": 28.46,
    "lon": 202.84
   },
   "member_spread_now_deg": {
    "lat": 21.01,
    "lon": 333.6
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DG2GG-27",
   "flight_id": "DG2GG-27_2026-07-04",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 07:28:00",
   "seed_lat": 55.9375,
   "seed_lon": 130.41667,
   "seed_alt_m": 13230.0,
   "seed_age_h": 21.87,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 50.02687,
    "lon": -59.86648,
    "alt_m": 13242.0
   },
   "member_spread_deg": {
    "lat": 34.23,
    "lon": 327.94
   },
   "member_spread_now_deg": {
    "lat": 9.94,
    "lon": 10.02
   },
   "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": 14.65,
   "float_reliable": false,
   "dead_reckoned": false,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 32.62344,
    "lon": 1.86886,
    "alt_m": 9430.9
   },
   "member_spread_deg": {
    "lat": 47.97,
    "lon": 175.68
   },
   "member_spread_now_deg": {
    "lat": 4.83,
    "lon": 3.11
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "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": 85.35,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 49.46378,
    "lon": 172.20968,
    "alt_m": 8710.5
   },
   "member_spread_deg": {
    "lat": 29.3,
    "lon": 334.56
   },
   "member_spread_now_deg": {
    "lat": 26.11,
    "lon": 20.73
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "DL0MZ-493",
   "flight_id": "DL0MZ-493_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 04:36:01",
   "seed_lat": 63.02083,
   "seed_lon": 56.91667,
   "seed_alt_m": 12160.0,
   "seed_age_h": 0.73,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-05 04:00:00",
    "lat": 65.24651,
    "lon": -139.66917,
    "alt_m": 12360.3
   },
   "member_spread_deg": {
    "lat": 37.81,
    "lon": 347.54
   },
   "member_spread_now_deg": {
    "lat": 0.16,
    "lon": 0.22
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DL0MZ-493e",
   "flight_id": "DL0MZ-493e_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 04:37:32",
   "seed_lat": 63.01546,
   "seed_lon": 56.89114,
   "seed_alt_m": 12160.0,
   "seed_age_h": 0.71,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-05 04:15:00",
    "lat": 68.32709,
    "lon": -154.84977,
    "alt_m": 12217.7
   },
   "member_spread_deg": {
    "lat": 39.51,
    "lon": 349.51
   },
   "member_spread_now_deg": {
    "lat": 0.16,
    "lon": 0.19
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DN3LEO-13",
   "flight_id": "DN3LEO-13_2026-04-12",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 20:23:00",
   "seed_lat": 56.22917,
   "seed_lon": -36.875,
   "seed_alt_m": 12440.0,
   "seed_age_h": 8.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 65.02842,
    "lon": 145.84717,
    "alt_m": 12416.8
   },
   "member_spread_deg": {
    "lat": 20.61,
    "lon": 270.37
   },
   "member_spread_now_deg": {
    "lat": 2.04,
    "lon": 1.65
   },
   "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": 113.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 88.83018,
    "lon": -74.43867,
    "alt_m": 14638.5
   },
   "member_spread_deg": {
    "lat": 40.5,
    "lon": 318.85
   },
   "member_spread_now_deg": {
    "lat": 6.96,
    "lon": 304.23
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 08:23:00",
   "seed_lat": 66.16667,
   "seed_lon": 33.04167,
   "seed_alt_m": 12700.0,
   "seed_age_h": 20.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 63.05462,
    "lon": -138.4934,
    "alt_m": 12938.5
   },
   "member_spread_deg": {
    "lat": 35.39,
    "lon": 132.21
   },
   "member_spread_now_deg": {
    "lat": 2.78,
    "lon": 7.17
   },
   "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": 137.08,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 48.05379,
    "lon": 158.88481,
    "alt_m": 13829.6
   },
   "member_spread_deg": {
    "lat": 39.09,
    "lon": 333.55
   },
   "member_spread_now_deg": {
    "lat": 23.17,
    "lon": 275.45
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "K5NOT-11",
   "flight_id": "K5NOT-11_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 19:05:37",
   "seed_lat": 48.83328,
   "seed_lon": -42.83333,
   "seed_alt_m": 13180.0,
   "seed_age_h": 10.24,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 39.38649,
    "lon": 105.76163,
    "alt_m": 13056.7
   },
   "member_spread_deg": {
    "lat": 38.56,
    "lon": 118.34
   },
   "member_spread_now_deg": {
    "lat": 9.31,
    "lon": 4.54
   },
   "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": 46.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 42.73952,
    "lon": 134.21969,
    "alt_m": 13225.3
   },
   "member_spread_deg": {
    "lat": 74.03,
    "lon": 206.9
   },
   "member_spread_now_deg": {
    "lat": 13.05,
    "lon": 27.6
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "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": 223.38,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": -31.87798,
    "lon": 121.47007,
    "alt_m": 14353.9
   },
   "member_spread_deg": {
    "lat": 30.15,
    "lon": 353.13
   },
   "member_spread_now_deg": {
    "lat": 10.77,
    "lon": 301.99
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC3LBR-449",
   "flight_id": "KC3LBR-449_2026-07-06",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 03:57:03",
   "seed_lat": 72.33333,
   "seed_lon": 150.04167,
   "seed_alt_m": 13170.0,
   "seed_age_h": 1.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-05 03:30:00",
    "lat": 56.57859,
    "lon": -107.47447,
    "alt_m": 13314.5
   },
   "member_spread_deg": {
    "lat": 36.84,
    "lon": 250.73
   },
   "member_spread_now_deg": {
    "lat": 0.14,
    "lon": 0.41
   },
   "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": 20.2,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 54.67828,
    "lon": 79.94516,
    "alt_m": 12792.8
   },
   "member_spread_deg": {
    "lat": 27.08,
    "lon": 210.73
   },
   "member_spread_now_deg": {
    "lat": 5.78,
    "lon": 2.77
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KC5TRB-1",
   "flight_id": "KC5TRB-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 19:00:43",
   "seed_lat": 41.99995,
   "seed_lon": -27.8333,
   "seed_alt_m": 13060.0,
   "seed_age_h": 10.32,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 69.25359,
    "lon": 76.18629,
    "alt_m": 12969.4
   },
   "member_spread_deg": {
    "lat": 31.07,
    "lon": 108.53
   },
   "member_spread_now_deg": {
    "lat": 3.46,
    "lon": 5.22
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 01:21:00",
   "seed_lat": 59.04167,
   "seed_lon": -143.875,
   "seed_alt_m": 12140.0,
   "seed_age_h": 3.98,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-05 00:45:00",
    "lat": 55.88592,
    "lon": -86.70714,
    "alt_m": 12154.9
   },
   "member_spread_deg": {
    "lat": 16.79,
    "lon": 44.11
   },
   "member_spread_now_deg": {
    "lat": 2.1,
    "lon": 0.88
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KI1TEN-1",
   "flight_id": "KI1TEN-1_2026-07-23",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 22:05:27",
   "seed_lat": 31.31245,
   "seed_lon": -88.74996,
   "seed_alt_m": 12400.0,
   "seed_age_h": 7.24,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 16.48601,
    "lon": -90.61572,
    "alt_m": 12411.4
   },
   "member_spread_deg": {
    "lat": 28.88,
    "lon": 70.71
   },
   "member_spread_now_deg": {
    "lat": 0.84,
    "lon": 0.71
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KI6DS-11",
   "flight_id": "KI6DS-11_2026-02-03",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 20:20:45",
   "seed_lat": 52.49995,
   "seed_lon": -35.12498,
   "seed_alt_m": 13600.0,
   "seed_age_h": 8.99,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 73.51319,
    "lon": 151.18208,
    "alt_m": 13071.6
   },
   "member_spread_deg": {
    "lat": 20.88,
    "lon": 147.94
   },
   "member_spread_now_deg": {
    "lat": 1.51,
    "lon": 6.62
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KL7BB-1",
   "flight_id": "KL7BB-1_2026-06-24",
   "payload_type": "APRS",
   "seed_time": "2026-07-18 17:48:12",
   "seed_lat": 60.94767,
   "seed_lon": 14.502,
   "seed_alt_m": 12261.0,
   "seed_age_h": 251.53,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 72.18447,
    "lon": -27.46014,
    "alt_m": 12171.1
   },
   "member_spread_deg": {
    "lat": 24.44,
    "lon": 282.75
   },
   "member_spread_now_deg": {
    "lat": 38.4,
    "lon": 283.79
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KO6FE-15",
   "flight_id": "KO6FE-15_2025-11-09",
   "payload_type": "WSPR",
   "seed_time": "2026-07-19 07:56:00",
   "seed_lat": 49.39583,
   "seed_lon": 101.95833,
   "seed_alt_m": 12920.0,
   "seed_age_h": 237.4,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 71.66383,
    "lon": -45.26066,
    "alt_m": 12933.2
   },
   "member_spread_deg": {
    "lat": 44.01,
    "lon": 230.23
   },
   "member_spread_now_deg": {
    "lat": 18.76,
    "lon": 355.72
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "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": 173.45,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": -17.77568,
    "lon": -144.62541,
    "alt_m": 14796.6
   },
   "member_spread_deg": {
    "lat": 32.82,
    "lon": 186.46
   },
   "member_spread_now_deg": {
    "lat": 34.1,
    "lon": 121.76
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "NQ1W",
   "flight_id": "NQ1W_2026-06-19",
   "payload_type": "WSPR",
   "seed_time": "2026-07-17 21:22:00",
   "seed_lat": 39.25,
   "seed_lon": -120.16667,
   "seed_alt_m": 13540.0,
   "seed_age_h": 271.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 11.98875,
    "lon": -53.61558,
    "alt_m": 13682.1
   },
   "member_spread_deg": {
    "lat": 34.51,
    "lon": 283.82
   },
   "member_spread_now_deg": {
    "lat": 53.87,
    "lon": 292.01
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "PA3EIV-18",
   "flight_id": "PA3EIV-18_2026-07-12",
   "payload_type": "APRS",
   "seed_time": "2026-07-16 15:02:03",
   "seed_lat": 50.87858,
   "seed_lon": 7.81841,
   "seed_alt_m": 12025.0,
   "seed_age_h": 302.3,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 63.01152,
    "lon": 59.15537,
    "alt_m": 11823.4
   },
   "member_spread_deg": {
    "lat": 37.39,
    "lon": 240.46
   },
   "member_spread_now_deg": {
    "lat": 44.55,
    "lon": 358.59
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "PA7BOR-11",
   "flight_id": "PA7BOR-11_2026-07-10",
   "payload_type": "APRS",
   "seed_time": "2026-07-16 11:43:16",
   "seed_lat": 51.03808,
   "seed_lon": 8.00992,
   "seed_alt_m": 11456.0,
   "seed_age_h": 305.61,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 52.19685,
    "lon": 4.91825,
    "alt_m": 11466.4
   },
   "member_spread_deg": {
    "lat": 28.27,
    "lon": 288.79
   },
   "member_spread_now_deg": {
    "lat": 39.21,
    "lon": 249.68
   },
   "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": 64.56,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 28.43666,
    "lon": 172.94352,
    "alt_m": 12144.2
   },
   "member_spread_deg": {
    "lat": 55.48,
    "lon": 330.02
   },
   "member_spread_now_deg": {
    "lat": 24.72,
    "lon": 49.6
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-12",
   "flight_id": "SP0LND-12_2026-07-16",
   "payload_type": "APRS",
   "seed_time": "2026-07-18 10:05:46",
   "seed_lat": 66.80809,
   "seed_lon": 43.675,
   "seed_alt_m": 13484.0,
   "seed_age_h": 259.24,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 28.85846,
    "lon": -153.58737,
    "alt_m": 14093.0
   },
   "member_spread_deg": {
    "lat": 67.02,
    "lon": 331.25
   },
   "member_spread_now_deg": {
    "lat": 33.52,
    "lon": 341.23
   },
   "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": 64.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 63.0698,
    "lon": -144.17025,
    "alt_m": 13895.3
   },
   "member_spread_deg": {
    "lat": 17.7,
    "lon": 351.88
   },
   "member_spread_now_deg": {
    "lat": 13.38,
    "lon": 41.47
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "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": 159.33,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 24.06602,
    "lon": 58.67689,
    "alt_m": 14857.8
   },
   "member_spread_deg": {
    "lat": 45.97,
    "lon": 140.19
   },
   "member_spread_now_deg": {
    "lat": 34.09,
    "lon": 56.63
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "SP2ROC-12",
   "flight_id": "SP2ROC-12_2026-06-24",
   "payload_type": "APRS",
   "seed_time": "2026-07-18 09:07:40",
   "seed_lat": -5.7945,
   "seed_lon": 103.60775,
   "seed_alt_m": 14944.0,
   "seed_age_h": 260.21,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": -5.52614,
    "lon": -65.78862,
    "alt_m": 14989.5
   },
   "member_spread_deg": {
    "lat": 24.66,
    "lon": 226.42
   },
   "member_spread_now_deg": {
    "lat": 19.3,
    "lon": 215.7
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP2ROC-41",
   "flight_id": "SP2ROC-41_2026-01-25",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 17:25:00",
   "seed_lat": 57.54167,
   "seed_lon": -3.625,
   "seed_alt_m": 15460.0,
   "seed_age_h": 11.92,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 64.1018,
    "lon": 133.02848,
    "alt_m": 15280.2
   },
   "member_spread_deg": {
    "lat": 22.18,
    "lon": 131.06
   },
   "member_spread_now_deg": {
    "lat": 0.89,
    "lon": 8.53
   },
   "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": 194.05,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": -16.51368,
    "lon": -30.83286,
    "alt_m": 14221.1
   },
   "member_spread_deg": {
    "lat": 18.14,
    "lon": 98.47
   },
   "member_spread_now_deg": {
    "lat": 23.94,
    "lon": 352.71
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP6MPL-34",
   "flight_id": "SP6MPL-34_2025-12-03",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 04:52:00",
   "seed_lat": 61.79166,
   "seed_lon": 178.08333,
   "seed_alt_m": 13390.0,
   "seed_age_h": 0.47,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-05 04:15:00",
    "lat": 72.79749,
    "lon": 125.40738,
    "alt_m": 12828.4
   },
   "member_spread_deg": {
    "lat": 25.68,
    "lon": 286.49
   },
   "member_spread_now_deg": {
    "lat": 0.05,
    "lon": 0.26
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "VE3OCL-48",
   "flight_id": "VE3OCL-48_2026-05-12",
   "payload_type": "WSPR",
   "seed_time": "2026-07-18 11:55:00",
   "seed_lat": 45.41667,
   "seed_lon": -81.20833,
   "seed_alt_m": 16030.0,
   "seed_age_h": 257.42,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 71.7349,
    "lon": 103.85177,
    "alt_m": 15535.9
   },
   "member_spread_deg": {
    "lat": 37.56,
    "lon": 291.2
   },
   "member_spread_now_deg": {
    "lat": 32.85,
    "lon": 149.21
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "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": 190.6,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 35.20828,
    "lon": -178.08947,
    "alt_m": 13140.9
   },
   "member_spread_deg": {
    "lat": 42.07,
    "lon": 269.79
   },
   "member_spread_now_deg": {
    "lat": 34.54,
    "lon": 354.77
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "W0RBO-12",
   "flight_id": "W0RBO-12_2026-05-02",
   "payload_type": "WSPR",
   "seed_time": "2026-07-29 03:35:23",
   "seed_lat": 49.43745,
   "seed_lon": -176.37498,
   "seed_alt_m": 13780.0,
   "seed_age_h": 1.74,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-05 03:00:00",
    "lat": 58.85851,
    "lon": -48.36504,
    "alt_m": 13477.1
   },
   "member_spread_deg": {
    "lat": 36.86,
    "lon": 62.56
   },
   "member_spread_now_deg": {
    "lat": 0.19,
    "lon": 1.36
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "W0ZC-15",
   "flight_id": "W0ZC-15_2026-07-10",
   "payload_type": "APRS",
   "seed_time": "2026-07-19 15:52:12",
   "seed_lat": 67.67675,
   "seed_lon": 24.87034,
   "seed_alt_m": 12127.0,
   "seed_age_h": 229.46,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 51.82486,
    "lon": -128.51906,
    "alt_m": 12759.0
   },
   "member_spread_deg": {
    "lat": 32.29,
    "lon": 311.87
   },
   "member_spread_now_deg": {
    "lat": 32.56,
    "lon": 232.17
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "W4WC-1",
   "flight_id": "W4WC-1_2026-07-14",
   "payload_type": "APRS",
   "seed_time": "2026-07-17 22:00:22",
   "seed_lat": 35.70758,
   "seed_lon": -98.54792,
   "seed_alt_m": 9346.0,
   "seed_age_h": 271.33,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": 71.76141,
    "lon": 84.07912,
    "alt_m": 9376.5
   },
   "member_spread_deg": {
    "lat": 71.99,
    "lon": 317.29
   },
   "member_spread_now_deg": {
    "lat": 36.64,
    "lon": 174.35
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "WX8TOM-12",
   "flight_id": "WX8TOM-12_2026-07-18",
   "payload_type": "APRS",
   "seed_time": "2026-07-19 14:16:04",
   "seed_lat": 52.31942,
   "seed_lon": 14.9975,
   "seed_alt_m": 12988.0,
   "seed_age_h": 231.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 64.15642,
    "lon": -72.7884,
    "alt_m": 13192.2
   },
   "member_spread_deg": {
    "lat": 45.86,
    "lon": 222.16
   },
   "member_spread_now_deg": {
    "lat": 45.29,
    "lon": 317.36
   },
   "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": 64.5,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": 57.48853,
    "lon": 139.58202,
    "alt_m": 11575.2
   },
   "member_spread_deg": {
    "lat": 61.62,
    "lon": 345.74
   },
   "member_spread_now_deg": {
    "lat": 23.77,
    "lon": 11.27
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "ZS6SRC-37",
   "flight_id": "ZS6SRC-37_2026-07-15",
   "payload_type": "WSPR",
   "seed_time": "2026-07-28 12:19:00",
   "seed_lat": -23.0625,
   "seed_lon": 44.875,
   "seed_alt_m": 12340.0,
   "seed_age_h": 17.02,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": -33.43029,
    "lon": -31.08516,
    "alt_m": 12471.7
   },
   "member_spread_deg": {
    "lat": 22.02,
    "lon": 173.2
   },
   "member_spread_now_deg": {
    "lat": 2.05,
    "lon": 7.56
   },
   "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": 38.0,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:45:00",
    "lat": -13.11695,
    "lon": -123.45882,
    "alt_m": 13124.0
   },
   "member_spread_deg": {
    "lat": 28.12,
    "lon": 295.98
   },
   "member_spread_now_deg": {
    "lat": 9.28,
    "lon": 33.97
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "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": 219.45,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-08-04 23:30:00",
    "lat": -32.99348,
    "lon": 23.17738,
    "alt_m": 12975.7
   },
   "member_spread_deg": {
    "lat": 29.45,
    "lon": 192.81
   },
   "member_spread_now_deg": {
    "lat": 21.29,
    "lon": 306.47
   },
   "display_as": "region",
   "display_reason": "member_spread"
  }
 ]
}