{
 "generated_utc": "2026-09-25T11:27:48Z",
 "gfs_cycle_utc": "2026-09-25T06:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 479.5,
  "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_20260925_06Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20260925_06Z.geojson.gz"
 },
 "counts": {
  "flights": 49,
  "members": 9,
  "rows": 212913
 },
 "flights": [
  {
   "callsign": "AE4ZZ-22",
   "flight_id": "AE4ZZ-22_2026-09-19",
   "payload_type": "WSPR",
   "seed_time": "2026-09-23 15:38:41",
   "seed_lat": 44.43746,
   "seed_lon": -30.29163,
   "seed_alt_m": 13470.0,
   "seed_age_h": 43.69,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 46.06539,
    "lon": 98.84851,
    "alt_m": 13088.3
   },
   "member_spread_deg": {
    "lat": 18.09,
    "lon": 332.43
   },
   "member_spread_now_deg": {
    "lat": 29.54,
    "lon": 10.77
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "AE4ZZ-23",
   "flight_id": "AE4ZZ-23_2026-09-21",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 11:00:00",
   "seed_lat": 50.87497,
   "seed_lon": 11.20837,
   "seed_alt_m": 13360.0,
   "seed_age_h": 0.33,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 11:00:00",
    "lat": 39.76669,
    "lon": 117.83192,
    "alt_m": 12872.4
   },
   "member_spread_deg": {
    "lat": 11.24,
    "lon": 66.0
   },
   "member_spread_now_deg": {
    "lat": 0.23,
    "lon": 0.04
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 06:58:40",
   "seed_lat": -60.125,
   "seed_lon": 144.41668,
   "seed_alt_m": 12120.0,
   "seed_age_h": 4.36,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-02 06:30:00",
    "lat": -67.0096,
    "lon": 87.66681,
    "alt_m": 11933.5
   },
   "member_spread_deg": {
    "lat": 11.61,
    "lon": 44.01
   },
   "member_spread_now_deg": {
    "lat": 0.82,
    "lon": 3.44
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "AIRCOR-6",
   "flight_id": "AIRCOR-6_2026-09-14",
   "payload_type": "APRS",
   "seed_time": "2026-09-23 15:39:13",
   "seed_lat": 40.33008,
   "seed_lon": -104.83542,
   "seed_alt_m": 15554.0,
   "seed_age_h": 43.68,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 30.26269,
    "lon": -50.04521,
    "alt_m": 15756.2
   },
   "member_spread_deg": {
    "lat": 18.74,
    "lon": 114.59
   },
   "member_spread_now_deg": {
    "lat": 15.76,
    "lon": 16.77
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS52",
   "flight_id": "BSS52_2025-12-25",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 04:51:18",
   "seed_lat": 32.4375,
   "seed_lon": 164.70833,
   "seed_alt_m": 13740.0,
   "seed_age_h": 6.48,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 53.53744,
    "lon": -22.7707,
    "alt_m": 13102.8
   },
   "member_spread_deg": {
    "lat": 40.48,
    "lon": 77.83
   },
   "member_spread_now_deg": {
    "lat": 1.69,
    "lon": 2.44
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 21:36:48",
   "seed_lat": 50.52083,
   "seed_lon": -101.0,
   "seed_alt_m": 13080.0,
   "seed_age_h": 13.72,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 40.03654,
    "lon": 63.89835,
    "alt_m": 13070.7
   },
   "member_spread_deg": {
    "lat": 16.93,
    "lon": 58.95
   },
   "member_spread_now_deg": {
    "lat": 4.99,
    "lon": 3.39
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 07:20:18",
   "seed_lat": 44.39583,
   "seed_lon": 119.41667,
   "seed_alt_m": 13710.0,
   "seed_age_h": 4.0,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 06:45:00",
    "lat": 60.01476,
    "lon": -10.22278,
    "alt_m": 13464.5
   },
   "member_spread_deg": {
    "lat": 28.83,
    "lon": 108.92
   },
   "member_spread_now_deg": {
    "lat": 0.25,
    "lon": 0.88
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BZ-7",
   "flight_id": "BZ-7_2026-08-06",
   "payload_type": "WSPR",
   "seed_time": "2026-09-20 07:29:00",
   "seed_lat": 31.91667,
   "seed_lon": 0.95833,
   "seed_alt_m": 11580.0,
   "seed_age_h": 123.85,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 47.57134,
    "lon": -103.99542,
    "alt_m": 11300.4
   },
   "member_spread_deg": {
    "lat": 63.28,
    "lon": 135.28
   },
   "member_spread_now_deg": {
    "lat": 15.03,
    "lon": 107.62
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DF7PN-427",
   "flight_id": "DF7PN-427_2026-08-03",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 21:54:01",
   "seed_lat": 50.14583,
   "seed_lon": -98.875,
   "seed_alt_m": 12370.0,
   "seed_age_h": 13.43,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 43.57116,
    "lon": 52.91301,
    "alt_m": 12291.7
   },
   "member_spread_deg": {
    "lat": 39.06,
    "lon": 121.44
   },
   "member_spread_now_deg": {
    "lat": 4.62,
    "lon": 4.77
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DF7PN-427e",
   "flight_id": "DF7PN-427e_2026-08-03",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 21:34:32",
   "seed_lat": 50.13758,
   "seed_lon": -99.1934,
   "seed_alt_m": 12360.0,
   "seed_age_h": 13.76,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 42.689,
    "lon": 52.3092,
    "alt_m": 12333.5
   },
   "member_spread_deg": {
    "lat": 28.85,
    "lon": 93.62
   },
   "member_spread_now_deg": {
    "lat": 4.75,
    "lon": 4.56
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-30",
   "flight_id": "DG2GG-30_2026-08-07",
   "payload_type": "WSPR",
   "seed_time": "2026-09-23 13:21:00",
   "seed_lat": 40.22917,
   "seed_lon": 25.54167,
   "seed_alt_m": 12550.0,
   "seed_age_h": 45.98,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 55.58947,
    "lon": -146.8909,
    "alt_m": 12820.5
   },
   "member_spread_deg": {
    "lat": 15.63,
    "lon": 357.15
   },
   "member_spread_now_deg": {
    "lat": 7.75,
    "lon": 14.14
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-31",
   "flight_id": "DG2GG-31_2026-08-13",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 00:57:00",
   "seed_lat": 41.0,
   "seed_lon": -139.58333,
   "seed_alt_m": 13260.0,
   "seed_age_h": 10.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 32.01017,
    "lon": -33.08752,
    "alt_m": 13610.9
   },
   "member_spread_deg": {
    "lat": 52.62,
    "lon": 87.81
   },
   "member_spread_now_deg": {
    "lat": 1.49,
    "lon": 4.96
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-32",
   "flight_id": "DG2GG-32_2026-09-03",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 21:26:00",
   "seed_lat": 58.625,
   "seed_lon": -153.83333,
   "seed_alt_m": 13070.0,
   "seed_age_h": 13.9,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 68.12501,
    "lon": -13.78477,
    "alt_m": 12669.0
   },
   "member_spread_deg": {
    "lat": 22.54,
    "lon": 108.98
   },
   "member_spread_now_deg": {
    "lat": 1.9,
    "lon": 3.63
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-34",
   "flight_id": "DG2GG-34_2026-09-15",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 04:25:00",
   "seed_lat": 28.02083,
   "seed_lon": 164.04167,
   "seed_alt_m": 13420.0,
   "seed_age_h": 6.92,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 17.359,
    "lon": -92.83888,
    "alt_m": 13585.5
   },
   "member_spread_deg": {
    "lat": 29.14,
    "lon": 35.65
   },
   "member_spread_now_deg": {
    "lat": 2.34,
    "lon": 0.82
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DO3GU-44",
   "flight_id": "DO3GU-44_2026-07-29",
   "payload_type": "WSPR",
   "seed_time": "2026-09-18 13:18:43",
   "seed_lat": 35.89583,
   "seed_lon": -76.25,
   "seed_alt_m": 15219.0,
   "seed_age_h": 166.02,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 4.38769,
    "lon": -35.08318,
    "alt_m": 15334.4
   },
   "member_spread_deg": {
    "lat": 48.37,
    "lon": 271.83
   },
   "member_spread_now_deg": {
    "lat": 41.46,
    "lon": 80.03
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DO3GU-48",
   "flight_id": "DO3GU-48_2026-09-08",
   "payload_type": "WSPR",
   "seed_time": "2026-09-18 07:36:22",
   "seed_lat": 68.0,
   "seed_lon": 83.29167,
   "seed_alt_m": 14417.0,
   "seed_age_h": 171.73,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 60.26647,
    "lon": -2.52665,
    "alt_m": 14389.6
   },
   "member_spread_deg": {
    "lat": 26.58,
    "lon": 56.26
   },
   "member_spread_now_deg": {
    "lat": 11.99,
    "lon": 34.38
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "DO3GU-49",
   "flight_id": "DO3GU-49_2026-09-15",
   "payload_type": "WSPR",
   "seed_time": "2026-09-19 12:40:28",
   "seed_lat": 39.83333,
   "seed_lon": 60.66667,
   "seed_alt_m": 13990.0,
   "seed_age_h": 142.66,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 15.81314,
    "lon": -93.19587,
    "alt_m": 14425.7
   },
   "member_spread_deg": {
    "lat": 40.82,
    "lon": 308.21
   },
   "member_spread_now_deg": {
    "lat": 38.46,
    "lon": 342.12
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DO3GU-8",
   "flight_id": "DO3GU-8_2026-08-12",
   "payload_type": "APRS",
   "seed_time": "2026-09-24 02:46:08",
   "seed_lat": 45.11771,
   "seed_lon": 143.63833,
   "seed_alt_m": 13946.0,
   "seed_age_h": 32.57,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 77.36596,
    "lon": 6.44403,
    "alt_m": 13859.0
   },
   "member_spread_deg": {
    "lat": 29.82,
    "lon": 40.15
   },
   "member_spread_now_deg": {
    "lat": 3.03,
    "lon": 22.25
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 10:28:00",
   "seed_lat": 39.0625,
   "seed_lon": -20.125,
   "seed_alt_m": 13590.0,
   "seed_age_h": 0.87,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 10:00:00",
    "lat": 43.65305,
    "lon": 63.43891,
    "alt_m": 13224.8
   },
   "member_spread_deg": {
    "lat": 11.97,
    "lon": 69.7
   },
   "member_spread_now_deg": {
    "lat": 0.33,
    "lon": 0.29
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KC3LBR-485",
   "flight_id": "KC3LBR-485_2026-03-19",
   "payload_type": "WSPR",
   "seed_time": "2026-09-15 23:15:47",
   "seed_lat": 26.64583,
   "seed_lon": -149.20833,
   "seed_alt_m": 13760.0,
   "seed_age_h": 228.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 29.86889,
    "lon": 59.60802,
    "alt_m": 13770.8
   },
   "member_spread_deg": {
    "lat": 30.03,
    "lon": 212.38
   },
   "member_spread_now_deg": {
    "lat": 51.99,
    "lon": 107.01
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KC5TRB-1",
   "flight_id": "KC5TRB-1_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-09-20 04:55:43",
   "seed_lat": 47.10411,
   "seed_lon": 148.79169,
   "seed_alt_m": 13000.0,
   "seed_age_h": 126.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 43.45273,
    "lon": 14.18893,
    "alt_m": 13229.3
   },
   "member_spread_deg": {
    "lat": 40.3,
    "lon": 137.39
   },
   "member_spread_now_deg": {
    "lat": 25.67,
    "lon": 61.8
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KD7FXO-1",
   "flight_id": "KD7FXO-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-09-12 06:05:00",
   "seed_lat": 45.47917,
   "seed_lon": 159.375,
   "seed_alt_m": 12660.0,
   "seed_age_h": 317.25,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 65.77566,
    "lon": -89.08662,
    "alt_m": 12008.6
   },
   "member_spread_deg": {
    "lat": 44.84,
    "lon": 241.62
   },
   "member_spread_now_deg": {
    "lat": 28.54,
    "lon": 224.74
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KE8RES-8",
   "flight_id": "KE8RES-8_2026-06-20",
   "payload_type": "WSPR",
   "seed_time": "2026-09-13 13:01:00",
   "seed_lat": 42.0625,
   "seed_lon": 28.04167,
   "seed_alt_m": 12700.0,
   "seed_age_h": 286.32,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 62.39129,
    "lon": 97.7713,
    "alt_m": 12459.6
   },
   "member_spread_deg": {
    "lat": 40.89,
    "lon": 353.33
   },
   "member_spread_now_deg": {
    "lat": 27.98,
    "lon": 194.25
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KI6DS-11",
   "flight_id": "KI6DS-11_2026-02-03",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 21:25:45",
   "seed_lat": 70.24995,
   "seed_lon": -101.37498,
   "seed_alt_m": 12810.0,
   "seed_age_h": 13.91,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 67.86361,
    "lon": -5.02337,
    "alt_m": 12958.3
   },
   "member_spread_deg": {
    "lat": 38.25,
    "lon": 227.92
   },
   "member_spread_now_deg": {
    "lat": 0.75,
    "lon": 8.51
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KJ4AWK-1",
   "flight_id": "KJ4AWK-1_2026-08-22",
   "payload_type": "APRS",
   "seed_time": "2026-09-25 01:16:18",
   "seed_lat": 62.70708,
   "seed_lon": -145.26817,
   "seed_alt_m": 12310.0,
   "seed_age_h": 10.06,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 57.34579,
    "lon": -33.68207,
    "alt_m": 12092.6
   },
   "member_spread_deg": {
    "lat": 23.23,
    "lon": 74.21
   },
   "member_spread_now_deg": {
    "lat": 2.56,
    "lon": 1.53
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KM6BWB-1",
   "flight_id": "KM6BWB-1_2026-09-21",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 10:53:25",
   "seed_lat": 35.43744,
   "seed_lon": -15.04162,
   "seed_alt_m": 12920.0,
   "seed_age_h": 0.44,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 11:00:00",
    "lat": 37.86748,
    "lon": 111.03001,
    "alt_m": 12572.3
   },
   "member_spread_deg": {
    "lat": 32.02,
    "lon": 129.16
   },
   "member_spread_now_deg": {
    "lat": 0.12,
    "lon": 0.07
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KO4VAQ-1",
   "flight_id": "KO4VAQ-1_2026-09-07",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 21:13:25",
   "seed_lat": 41.06244,
   "seed_lon": -87.66665,
   "seed_alt_m": 13120.0,
   "seed_age_h": 14.11,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 23.01646,
    "lon": -18.56459,
    "alt_m": 13172.2
   },
   "member_spread_deg": {
    "lat": 18.2,
    "lon": 88.13
   },
   "member_spread_now_deg": {
    "lat": 7.0,
    "lon": 4.07
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KS4VA-27",
   "flight_id": "KS4VA-27_2026-08-29",
   "payload_type": "WSPR",
   "seed_time": "2026-09-20 17:01:27",
   "seed_lat": 22.39578,
   "seed_lon": 15.66669,
   "seed_alt_m": 15250.0,
   "seed_age_h": 114.31,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 18.82699,
    "lon": 95.15518,
    "alt_m": 15435.1
   },
   "member_spread_deg": {
    "lat": 38.43,
    "lon": 271.22
   },
   "member_spread_now_deg": {
    "lat": 4.59,
    "lon": 57.3
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "N0MPM-31",
   "flight_id": "N0MPM-31_2026-04-16",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 23:23:19",
   "seed_lat": 46.49995,
   "seed_lon": -123.24998,
   "seed_alt_m": 13900.0,
   "seed_age_h": 11.95,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 39.69875,
    "lon": 49.42101,
    "alt_m": 14085.6
   },
   "member_spread_deg": {
    "lat": 11.82,
    "lon": 63.06
   },
   "member_spread_now_deg": {
    "lat": 4.19,
    "lon": 7.87
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "N4TVV-4",
   "flight_id": "N4TVV-4_2026-09-05",
   "payload_type": "APRS",
   "seed_time": "2026-09-21 23:21:55",
   "seed_lat": 46.33,
   "seed_lon": 147.514,
   "seed_alt_m": 12666.0,
   "seed_age_h": 83.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 42.51385,
    "lon": -82.98264,
    "alt_m": 12861.7
   },
   "member_spread_deg": {
    "lat": 35.19,
    "lon": 303.99
   },
   "member_spread_now_deg": {
    "lat": 35.5,
    "lon": 332.74
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "NE9JJ-11",
   "flight_id": "NE9JJ-11_2026-09-11",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 22:43:00",
   "seed_lat": 28.625,
   "seed_lon": -119.16667,
   "seed_alt_m": 12970.0,
   "seed_age_h": 12.62,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 47.59404,
    "lon": 13.20113,
    "alt_m": 13015.4
   },
   "member_spread_deg": {
    "lat": 17.05,
    "lon": 72.21
   },
   "member_spread_now_deg": {
    "lat": 2.31,
    "lon": 2.44
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "NQ1W-6",
   "flight_id": "NQ1W-6_2026-09-11",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 23:56:00",
   "seed_lat": 29.72917,
   "seed_lon": -150.04167,
   "seed_alt_m": 13380.0,
   "seed_age_h": 11.4,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 25.87098,
    "lon": -54.00059,
    "alt_m": 13482.8
   },
   "member_spread_deg": {
    "lat": 22.21,
    "lon": 61.6
   },
   "member_spread_now_deg": {
    "lat": 0.77,
    "lon": 7.32
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "PE2BZ-11",
   "flight_id": "PE2BZ-11_2026-09-16",
   "payload_type": "APRS",
   "seed_time": "2026-09-23 15:32:47",
   "seed_lat": 35.57308,
   "seed_lon": 6.40783,
   "seed_alt_m": 12600.0,
   "seed_age_h": 43.79,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 33.57785,
    "lon": -135.9735,
    "alt_m": 12615.1
   },
   "member_spread_deg": {
    "lat": 22.19,
    "lon": 321.33
   },
   "member_spread_now_deg": {
    "lat": 9.5,
    "lon": 8.23
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-12",
   "flight_id": "SP0LND-12_2026-09-19",
   "payload_type": "APRS",
   "seed_time": "2026-09-24 14:38:48",
   "seed_lat": 44.85758,
   "seed_lon": 27.55167,
   "seed_alt_m": 13732.0,
   "seed_age_h": 20.69,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 46.56975,
    "lon": 173.78432,
    "alt_m": 13716.1
   },
   "member_spread_deg": {
    "lat": 14.4,
    "lon": 353.48
   },
   "member_spread_now_deg": {
    "lat": 2.0,
    "lon": 9.95
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-13",
   "flight_id": "SP0LND-13_2026-08-13",
   "payload_type": "APRS",
   "seed_time": "2026-09-15 14:54:25",
   "seed_lat": 53.91942,
   "seed_lon": -95.70808,
   "seed_alt_m": 13217.0,
   "seed_age_h": 236.43,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 42.88989,
    "lon": 135.72785,
    "alt_m": 13372.0
   },
   "member_spread_deg": {
    "lat": 35.01,
    "lon": 302.34
   },
   "member_spread_now_deg": {
    "lat": 28.03,
    "lon": 253.94
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP0LND-14",
   "flight_id": "SP0LND-14_2026-09-09",
   "payload_type": "APRS",
   "seed_time": "2026-09-13 10:47:50",
   "seed_lat": 71.62158,
   "seed_lon": 24.96141,
   "seed_alt_m": 13354.0,
   "seed_age_h": 288.54,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 59.13962,
    "lon": 48.99067,
    "alt_m": 13237.5
   },
   "member_spread_deg": {
    "lat": 40.46,
    "lon": 262.47
   },
   "member_spread_now_deg": {
    "lat": 25.43,
    "lon": 327.48
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP0LND-15",
   "flight_id": "SP0LND-15_2026-09-16",
   "payload_type": "APRS",
   "seed_time": "2026-09-17 07:31:21",
   "seed_lat": 46.4615,
   "seed_lon": 27.87242,
   "seed_alt_m": 14195.0,
   "seed_age_h": 195.81,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 30.34944,
    "lon": -28.08759,
    "alt_m": 14608.4
   },
   "member_spread_deg": {
    "lat": 66.53,
    "lon": 90.48
   },
   "member_spread_now_deg": {
    "lat": 33.16,
    "lon": 50.22
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "SP0LND-39",
   "flight_id": "SP0LND-39_2026-08-27",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 16:15:00",
   "seed_lat": 44.41667,
   "seed_lon": -30.25,
   "seed_alt_m": 14100.0,
   "seed_age_h": 19.08,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 43.09315,
    "lon": -117.85359,
    "alt_m": 13886.8
   },
   "member_spread_deg": {
    "lat": 31.69,
    "lon": 343.58
   },
   "member_spread_now_deg": {
    "lat": 10.91,
    "lon": 15.78
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-6",
   "flight_id": "SP0LND-6_2026-09-06",
   "payload_type": "APRS",
   "seed_time": "2026-09-24 22:00:07",
   "seed_lat": 44.73692,
   "seed_lon": -79.36708,
   "seed_alt_m": 14119.0,
   "seed_age_h": 13.33,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 22.20447,
    "lon": -33.33183,
    "alt_m": 14582.2
   },
   "member_spread_deg": {
    "lat": 17.8,
    "lon": 105.82
   },
   "member_spread_now_deg": {
    "lat": 3.91,
    "lon": 3.21
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-9",
   "flight_id": "SP0LND-9_2026-08-27",
   "payload_type": "APRS",
   "seed_time": "2026-09-13 15:15:20",
   "seed_lat": 42.07925,
   "seed_lon": 23.58366,
   "seed_alt_m": 13938.0,
   "seed_age_h": 284.08,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-02 05:45:00",
    "lat": 48.27936,
    "lon": 81.05252,
    "alt_m": 13902.3
   },
   "member_spread_deg": {
    "lat": 29.88,
    "lon": 98.45
   },
   "member_spread_now_deg": {
    "lat": 19.35,
    "lon": 81.83
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP2ROC-41",
   "flight_id": "SP2ROC-41_2026-01-25",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 08:13:00",
   "seed_lat": 48.3125,
   "seed_lon": 106.58333,
   "seed_alt_m": 15340.0,
   "seed_age_h": 3.12,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 07:45:00",
    "lat": 59.6261,
    "lon": -98.08516,
    "alt_m": 14914.7
   },
   "member_spread_deg": {
    "lat": 15.21,
    "lon": 20.77
   },
   "member_spread_now_deg": {
    "lat": 0.09,
    "lon": 0.56
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP6MPL-32",
   "flight_id": "SP6MPL-32_2026-01-23",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 09:27:00",
   "seed_lat": 41.72918,
   "seed_lon": 113.33333,
   "seed_alt_m": 13560.0,
   "seed_age_h": 25.88,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 71.96541,
    "lon": 27.44522,
    "alt_m": 13478.0
   },
   "member_spread_deg": {
    "lat": 38.59,
    "lon": 68.91
   },
   "member_spread_now_deg": {
    "lat": 4.01,
    "lon": 16.51
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP6MPL-34",
   "flight_id": "SP6MPL-34_2025-12-03",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 20:07:00",
   "seed_lat": 42.0,
   "seed_lon": -81.375,
   "seed_alt_m": 13700.0,
   "seed_age_h": 15.22,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 33.9583,
    "lon": 32.74593,
    "alt_m": 13618.8
   },
   "member_spread_deg": {
    "lat": 11.98,
    "lon": 79.77
   },
   "member_spread_now_deg": {
    "lat": 7.21,
    "lon": 1.2
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "VE3VRO-34",
   "flight_id": "VE3VRO-34_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-09-24 16:55:00",
   "seed_lat": 62.66667,
   "seed_lon": -45.75,
   "seed_alt_m": 12010.0,
   "seed_age_h": 18.42,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 65.59312,
    "lon": 165.83925,
    "alt_m": 12128.4
   },
   "member_spread_deg": {
    "lat": 18.04,
    "lon": 332.37
   },
   "member_spread_now_deg": {
    "lat": 0.65,
    "lon": 1.87
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "VE3VRO-36",
   "flight_id": "VE3VRO-36_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 09:51:00",
   "seed_lat": 57.16667,
   "seed_lon": 84.75,
   "seed_alt_m": 12760.0,
   "seed_age_h": 1.48,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 09:15:00",
    "lat": 50.99281,
    "lon": 178.1018,
    "alt_m": 12484.5
   },
   "member_spread_deg": {
    "lat": 34.66,
    "lon": 341.13
   },
   "member_spread_now_deg": {
    "lat": 0.05,
    "lon": 1.08
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "W5AJ-1",
   "flight_id": "W5AJ-1_2026-08-02",
   "payload_type": "WSPR",
   "seed_time": "2026-09-14 19:55:29",
   "seed_lat": 59.41661,
   "seed_lon": -58.74997,
   "seed_alt_m": 11480.0,
   "seed_age_h": 255.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 46.50335,
    "lon": 60.16374,
    "alt_m": 12097.5
   },
   "member_spread_deg": {
    "lat": 53.85,
    "lon": 132.32
   },
   "member_spread_now_deg": {
    "lat": 32.11,
    "lon": 319.88
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "W7EEU-11",
   "flight_id": "W7EEU-11_2026-08-23",
   "payload_type": "APRS",
   "seed_time": "2026-09-19 14:28:59",
   "seed_lat": 63.95584,
   "seed_lon": 16.81967,
   "seed_alt_m": 11926.0,
   "seed_age_h": 140.85,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": 76.86852,
    "lon": 43.33659,
    "alt_m": 12256.0
   },
   "member_spread_deg": {
    "lat": 25.68,
    "lon": 205.55
   },
   "member_spread_now_deg": {
    "lat": 17.37,
    "lon": 298.61
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "WD4CFN-21",
   "flight_id": "WD4CFN-21_2026-09-13",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 10:13:54",
   "seed_lat": 29.99994,
   "seed_lon": 54.08344,
   "seed_alt_m": 12960.0,
   "seed_age_h": 1.1,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-02 09:45:00",
    "lat": 30.59001,
    "lon": -133.32867,
    "alt_m": 12985.5
   },
   "member_spread_deg": {
    "lat": 16.82,
    "lon": 310.75
   },
   "member_spread_now_deg": {
    "lat": 0.28,
    "lon": 0.25
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "ZS6WBT-1",
   "flight_id": "ZS6WBT-1_2026-08-19",
   "payload_type": "WSPR",
   "seed_time": "2026-09-25 06:01:00",
   "seed_lat": -14.45833,
   "seed_lon": 161.41667,
   "seed_alt_m": 15860.0,
   "seed_age_h": 5.32,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-02 05:30:00",
    "lat": -29.74426,
    "lon": -63.10625,
    "alt_m": 15357.3
   },
   "member_spread_deg": {
    "lat": 30.96,
    "lon": 100.36
   },
   "member_spread_now_deg": {
    "lat": 1.32,
    "lon": 1.27
   },
   "display_as": "track",
   "display_reason": "fresh"
  }
 ]
}