{
 "generated_utc": "2026-10-02T17:27:37Z",
 "gfs_cycle_utc": "2026-10-02T12:00:00Z",
 "model": {
  "source": "NCEP GFS 0.50 degree",
  "vertical_coordinate": "constant density (isopycnic)",
  "horizon_hours": 479.0,
  "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_20261002_12Z.csv.gz",
  "trajectories_geojson_gz": "PBA_forecast_20261002_12Z.geojson.gz"
 },
 "counts": {
  "flights": 51,
  "members": 9,
  "rows": 205407
 },
 "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": 217.69,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 48.70459,
    "lon": 1.02445,
    "alt_m": 13403.1
   },
   "member_spread_deg": {
    "lat": 47.74,
    "lon": 122.35
   },
   "member_spread_now_deg": {
    "lat": 18.82,
    "lon": 342.87
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "AE4ZZ-23",
   "flight_id": "AE4ZZ-23_2026-09-21",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 07:55:00",
   "seed_lat": 39.68747,
   "seed_lon": 116.29166,
   "seed_alt_m": 13050.0,
   "seed_age_h": 9.42,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 41.70037,
    "lon": -1.43198,
    "alt_m": 13390.3
   },
   "member_spread_deg": {
    "lat": 30.6,
    "lon": 58.31
   },
   "member_spread_now_deg": {
    "lat": 1.46,
    "lon": 3.64
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "AG6NS-23",
   "flight_id": "AG6NS-23_2026-02-07",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 04:43:40",
   "seed_lat": -66.22916,
   "seed_lon": -172.08332,
   "seed_alt_m": 12090.0,
   "seed_age_h": 12.61,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": -58.51426,
    "lon": 110.34485,
    "alt_m": 11998.2
   },
   "member_spread_deg": {
    "lat": 30.43,
    "lon": 276.42
   },
   "member_spread_now_deg": {
    "lat": 1.2,
    "lon": 8.64
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS52",
   "flight_id": "BSS52_2025-12-25",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 16:56:18",
   "seed_lat": 33.5625,
   "seed_lon": -59.0,
   "seed_alt_m": 13850.0,
   "seed_age_h": 0.4,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-09 17:00:00",
    "lat": 28.893,
    "lon": 38.37709,
    "alt_m": 13890.1
   },
   "member_spread_deg": {
    "lat": 15.73,
    "lon": 89.4
   },
   "member_spread_now_deg": {
    "lat": 0.39,
    "lon": 0.2
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS53",
   "flight_id": "BSS53_2026-03-09",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 16:47:18",
   "seed_lat": 30.89583,
   "seed_lon": 2.54167,
   "seed_alt_m": 13560.0,
   "seed_age_h": 0.55,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 16:15:00",
    "lat": 25.75176,
    "lon": -152.25809,
    "alt_m": 13429.6
   },
   "member_spread_deg": {
    "lat": 38.76,
    "lon": 46.71
   },
   "member_spread_now_deg": {
    "lat": 0.01,
    "lon": 0.12
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "BSS54",
   "flight_id": "BSS54_2026-07-09",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 16:25:48",
   "seed_lat": 49.97917,
   "seed_lon": -10.125,
   "seed_alt_m": 13770.0,
   "seed_age_h": 0.9,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 16:00:00",
    "lat": 47.73609,
    "lon": 39.6214,
    "alt_m": 13745.9
   },
   "member_spread_deg": {
    "lat": 28.53,
    "lon": 195.26
   },
   "member_spread_now_deg": {
    "lat": 0.17,
    "lon": 0.5
   },
   "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": 297.85,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 25.14629,
    "lon": 136.52911,
    "alt_m": 11538.2
   },
   "member_spread_deg": {
    "lat": 26.89,
    "lon": 303.87
   },
   "member_spread_now_deg": {
    "lat": 44.21,
    "lon": 229.16
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DF7PN-427",
   "flight_id": "DF7PN-427_2026-08-03",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 04:33:47",
   "seed_lat": 32.41667,
   "seed_lon": 70.375,
   "seed_alt_m": 12430.0,
   "seed_age_h": 12.77,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 44.26343,
    "lon": -46.27321,
    "alt_m": 12530.3
   },
   "member_spread_deg": {
    "lat": 27.77,
    "lon": 116.85
   },
   "member_spread_now_deg": {
    "lat": 2.83,
    "lon": 7.49
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DF7PN-427e",
   "flight_id": "DF7PN-427e_2026-08-03",
   "payload_type": "WSPR",
   "seed_time": "2026-10-01 10:25:32",
   "seed_lat": 33.68186,
   "seed_lon": 50.67882,
   "seed_alt_m": 12530.0,
   "seed_age_h": 30.91,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 38.27539,
    "lon": 0.51813,
    "alt_m": 12523.7
   },
   "member_spread_deg": {
    "lat": 26.29,
    "lon": 106.93
   },
   "member_spread_now_deg": {
    "lat": 4.4,
    "lon": 16.03
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-30",
   "flight_id": "DG2GG-30_2026-08-07",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 02:26:00",
   "seed_lat": 55.0625,
   "seed_lon": -167.29167,
   "seed_alt_m": 12220.0,
   "seed_age_h": 14.9,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 54.84679,
    "lon": 99.8265,
    "alt_m": 12124.2
   },
   "member_spread_deg": {
    "lat": 34.42,
    "lon": 118.74
   },
   "member_spread_now_deg": {
    "lat": 1.7,
    "lon": 8.17
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-31",
   "flight_id": "DG2GG-31_2026-08-13",
   "payload_type": "WSPR",
   "seed_time": "2026-09-28 14:02:00",
   "seed_lat": 21.33333,
   "seed_lon": -81.66667,
   "seed_alt_m": 13590.0,
   "seed_age_h": 99.3,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 34.35705,
    "lon": 93.86874,
    "alt_m": 13457.0
   },
   "member_spread_deg": {
    "lat": 24.67,
    "lon": 139.97
   },
   "member_spread_now_deg": {
    "lat": 27.22,
    "lon": 40.34
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "DG2GG-32",
   "flight_id": "DG2GG-32_2026-09-03",
   "payload_type": "WSPR",
   "seed_time": "2026-09-29 14:26:00",
   "seed_lat": 56.64583,
   "seed_lon": -16.75,
   "seed_alt_m": 13030.0,
   "seed_age_h": 74.9,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 60.6099,
    "lon": -107.22752,
    "alt_m": 12817.3
   },
   "member_spread_deg": {
    "lat": 45.87,
    "lon": 312.53
   },
   "member_spread_now_deg": {
    "lat": 42.98,
    "lon": 10.73
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "DG2GG-34",
   "flight_id": "DG2GG-34_2026-09-15",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 16:00:00",
   "seed_lat": 18.10417,
   "seed_lon": -95.54167,
   "seed_alt_m": 13680.0,
   "seed_age_h": 1.33,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 15:30:00",
    "lat": 19.9696,
    "lon": -75.87798,
    "alt_m": 13781.0
   },
   "member_spread_deg": {
    "lat": 18.1,
    "lon": 108.96
   },
   "member_spread_now_deg": {
    "lat": 0.22,
    "lon": 0.38
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DG2GG-36",
   "flight_id": "DG2GG-36_2026-09-26",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 00:50:00",
   "seed_lat": 41.4375,
   "seed_lon": 127.125,
   "seed_alt_m": 12810.0,
   "seed_age_h": 16.5,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 38.1372,
    "lon": -65.81038,
    "alt_m": 13357.4
   },
   "member_spread_deg": {
    "lat": 29.33,
    "lon": 82.23
   },
   "member_spread_now_deg": {
    "lat": 4.0,
    "lon": 8.14
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DH1PR-578",
   "flight_id": "DH1PR-578_2026-09-27",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 12:56:17",
   "seed_lat": 47.875,
   "seed_lon": 70.91667,
   "seed_alt_m": 11420.0,
   "seed_age_h": 4.4,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 12:30:00",
    "lat": 45.06691,
    "lon": -49.93782,
    "alt_m": 11552.4
   },
   "member_spread_deg": {
    "lat": 33.82,
    "lon": 175.74
   },
   "member_spread_now_deg": {
    "lat": 0.67,
    "lon": 0.73
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DH1PR-578e",
   "flight_id": "DH1PR-578e_2026-09-27",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 12:57:02",
   "seed_lat": 47.87474,
   "seed_lon": 70.92743,
   "seed_alt_m": 11420.0,
   "seed_age_h": 4.38,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 12:30:00",
    "lat": 44.91799,
    "lon": -50.43396,
    "alt_m": 11556.1
   },
   "member_spread_deg": {
    "lat": 33.91,
    "lon": 175.87
   },
   "member_spread_now_deg": {
    "lat": 0.67,
    "lon": 0.73
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "DJ2DS-35",
   "flight_id": "DJ2DS-35_2026-10-01",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 10:24:00",
   "seed_lat": 56.35417,
   "seed_lon": 88.83333,
   "seed_alt_m": 12550.0,
   "seed_age_h": 6.93,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 55.17226,
    "lon": -52.24738,
    "alt_m": 11989.4
   },
   "member_spread_deg": {
    "lat": 20.71,
    "lon": 80.54
   },
   "member_spread_now_deg": {
    "lat": 0.85,
    "lon": 1.5
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "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": 316.66,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 18.36118,
    "lon": 18.40177,
    "alt_m": 14396.8
   },
   "member_spread_deg": {
    "lat": 45.05,
    "lon": 155.29
   },
   "member_spread_now_deg": {
    "lat": 53.54,
    "lon": 261.4
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "DO3GU-8",
   "flight_id": "DO3GU-8_2026-08-12",
   "payload_type": "APRS",
   "seed_time": "2026-09-30 15:43:46",
   "seed_lat": 54.64466,
   "seed_lon": -1.98475,
   "seed_alt_m": 14350.0,
   "seed_age_h": 49.6,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 54.41633,
    "lon": 132.34519,
    "alt_m": 13807.3
   },
   "member_spread_deg": {
    "lat": 38.4,
    "lon": 300.79
   },
   "member_spread_now_deg": {
    "lat": 22.96,
    "lon": 17.93
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "EI6BFW-18",
   "flight_id": "EI6BFW-18_2026-07-25",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 10:48:00",
   "seed_lat": 46.8125,
   "seed_lon": 61.375,
   "seed_alt_m": 13050.0,
   "seed_age_h": 6.53,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 55.67296,
    "lon": -31.10841,
    "alt_m": 12694.7
   },
   "member_spread_deg": {
    "lat": 21.61,
    "lon": 96.33
   },
   "member_spread_now_deg": {
    "lat": 0.11,
    "lon": 0.55
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "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": 300.41,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 44.9475,
    "lon": 31.27912,
    "alt_m": 12912.9
   },
   "member_spread_deg": {
    "lat": 26.73,
    "lon": 229.95
   },
   "member_spread_now_deg": {
    "lat": 21.28,
    "lon": 95.47
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KI6DS-11",
   "flight_id": "KI6DS-11_2026-02-03",
   "payload_type": "WSPR",
   "seed_time": "2026-10-01 15:15:45",
   "seed_lat": 65.93745,
   "seed_lon": -11.20831,
   "seed_alt_m": 13120.0,
   "seed_age_h": 26.07,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 63.44163,
    "lon": -117.63957,
    "alt_m": 12912.8
   },
   "member_spread_deg": {
    "lat": 13.28,
    "lon": 298.97
   },
   "member_spread_now_deg": {
    "lat": 3.55,
    "lon": 25.7
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KJ4AWK-1",
   "flight_id": "KJ4AWK-1_2026-08-22",
   "payload_type": "APRS",
   "seed_time": "2026-09-26 23:40:52",
   "seed_lat": 59.10342,
   "seed_lon": -116.23583,
   "seed_alt_m": 12175.0,
   "seed_age_h": 137.65,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 75.05684,
    "lon": 108.12879,
    "alt_m": 12305.9
   },
   "member_spread_deg": {
    "lat": 33.07,
    "lon": 252.78
   },
   "member_spread_now_deg": {
    "lat": 18.44,
    "lon": 119.31
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "KM6BWB-1",
   "flight_id": "KM6BWB-1_2026-09-21",
   "payload_type": "WSPR",
   "seed_time": "2026-10-01 06:03:25",
   "seed_lat": 39.62494,
   "seed_lon": 122.79168,
   "seed_alt_m": 12420.0,
   "seed_age_h": 35.28,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 25.51175,
    "lon": -38.44941,
    "alt_m": 13056.1
   },
   "member_spread_deg": {
    "lat": 24.51,
    "lon": 40.12
   },
   "member_spread_now_deg": {
    "lat": 4.33,
    "lon": 7.38
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "KO4VAQ-1",
   "flight_id": "KO4VAQ-1_2026-09-07",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 09:38:25",
   "seed_lat": 33.77078,
   "seed_lon": 78.91668,
   "seed_alt_m": 12870.0,
   "seed_age_h": 7.69,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 41.97667,
    "lon": -55.30004,
    "alt_m": 12941.5
   },
   "member_spread_deg": {
    "lat": 17.0,
    "lon": 113.21
   },
   "member_spread_now_deg": {
    "lat": 0.89,
    "lon": 3.79
   },
   "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": 288.31,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 22.51543,
    "lon": 83.65536,
    "alt_m": 15271.1
   },
   "member_spread_deg": {
    "lat": 56.39,
    "lon": 243.01
   },
   "member_spread_now_deg": {
    "lat": 29.51,
    "lon": 260.47
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "LU1DNQ-1",
   "flight_id": "LU1DNQ-1_2026-09-20",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 14:39:00",
   "seed_lat": -0.94066,
   "seed_lon": -88.24584,
   "seed_alt_m": 13070.0,
   "seed_age_h": 2.68,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 14:15:00",
    "lat": -11.47321,
    "lon": -92.63822,
    "alt_m": 13058.8
   },
   "member_spread_deg": {
    "lat": 20.9,
    "lon": 91.65
   },
   "member_spread_now_deg": {
    "lat": 0.34,
    "lon": 0.75
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "N0MPM-31",
   "flight_id": "N0MPM-31_2026-04-16",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 10:53:19",
   "seed_lat": 35.74995,
   "seed_lon": 61.95835,
   "seed_alt_m": 14420.0,
   "seed_age_h": 6.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 40.00061,
    "lon": -60.63842,
    "alt_m": 14415.2
   },
   "member_spread_deg": {
    "lat": 20.27,
    "lon": 252.5
   },
   "member_spread_now_deg": {
    "lat": 1.54,
    "lon": 2.99
   },
   "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": 257.97,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 28.67812,
    "lon": 31.57689,
    "alt_m": 13057.5
   },
   "member_spread_deg": {
    "lat": 71.62,
    "lon": 253.88
   },
   "member_spread_now_deg": {
    "lat": 64.21,
    "lon": 222.08
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "NE9JJ-11",
   "flight_id": "NE9JJ-11_2026-09-11",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 12:53:00",
   "seed_lat": 42.875,
   "seed_lon": 14.0,
   "seed_alt_m": 13180.0,
   "seed_age_h": 4.45,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 12:30:00",
    "lat": 25.82564,
    "lon": -161.32325,
    "alt_m": 13333.1
   },
   "member_spread_deg": {
    "lat": 38.59,
    "lon": 337.88
   },
   "member_spread_now_deg": {
    "lat": 0.98,
    "lon": 0.33
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "NQ1W-6",
   "flight_id": "NQ1W-6_2026-09-11",
   "payload_type": "WSPR",
   "seed_time": "2026-09-28 18:36:00",
   "seed_lat": 10.85417,
   "seed_lon": -102.54167,
   "seed_alt_m": 8500.0,
   "seed_age_h": 94.73,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 30.20968,
    "lon": -113.62326,
    "alt_m": 8627.9
   },
   "member_spread_deg": {
    "lat": 43.95,
    "lon": 62.23
   },
   "member_spread_now_deg": {
    "lat": 32.75,
    "lon": 16.92
   },
   "display_as": "region",
   "display_reason": "seed_age"
  },
  {
   "callsign": "PE2BZ-11",
   "flight_id": "PE2BZ-11_2026-09-16",
   "payload_type": "APRS",
   "seed_time": "2026-09-26 11:14:53",
   "seed_lat": 37.51909,
   "seed_lon": 40.01825,
   "seed_alt_m": 8463.0,
   "seed_age_h": 150.09,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 7.39926,
    "lon": 44.71906,
    "alt_m": 8317.2
   },
   "member_spread_deg": {
    "lat": 40.47,
    "lon": 258.4
   },
   "member_spread_now_deg": {
    "lat": 37.08,
    "lon": 352.74
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP0LND-1",
   "flight_id": "SP0LND-1_2026-09-28",
   "payload_type": "APRS",
   "seed_time": "2026-10-02 11:34:20",
   "seed_lat": 40.784,
   "seed_lon": 38.14366,
   "seed_alt_m": 13585.0,
   "seed_age_h": 5.76,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 23.14857,
    "lon": -162.16408,
    "alt_m": 14249.8
   },
   "member_spread_deg": {
    "lat": 32.54,
    "lon": 333.35
   },
   "member_spread_now_deg": {
    "lat": 1.02,
    "lon": 2.45
   },
   "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": 194.69,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 21.32202,
    "lon": -53.46735,
    "alt_m": 14536.4
   },
   "member_spread_deg": {
    "lat": 61.74,
    "lon": 242.56
   },
   "member_spread_now_deg": {
    "lat": 8.82,
    "lon": 332.89
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP0LND-13",
   "flight_id": "SP0LND-13_2026-09-16",
   "payload_type": "APRS",
   "seed_time": "2026-09-28 10:22:44",
   "seed_lat": 43.07875,
   "seed_lon": 28.26709,
   "seed_alt_m": 13750.0,
   "seed_age_h": 102.96,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 69.87318,
    "lon": -47.52046,
    "alt_m": 13026.7
   },
   "member_spread_deg": {
    "lat": 35.43,
    "lon": 59.49
   },
   "member_spread_now_deg": {
    "lat": 7.75,
    "lon": 62.37
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "SP0LND-15",
   "flight_id": "SP0LND-15_2026-09-16",
   "payload_type": "APRS",
   "seed_time": "2026-10-01 13:39:51",
   "seed_lat": 12.15134,
   "seed_lon": -83.97275,
   "seed_alt_m": 14964.0,
   "seed_age_h": 27.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 1.62877,
    "lon": -72.00358,
    "alt_m": 14944.4
   },
   "member_spread_deg": {
    "lat": 20.77,
    "lon": 83.62
   },
   "member_spread_now_deg": {
    "lat": 9.3,
    "lon": 6.35
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-31",
   "flight_id": "SP0LND-31_2026-09-28",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 12:34:00",
   "seed_lat": 41.06266,
   "seed_lon": 38.91666,
   "seed_alt_m": 13600.0,
   "seed_age_h": 4.77,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 12:00:00",
    "lat": 22.72738,
    "lon": -160.0187,
    "alt_m": 14183.6
   },
   "member_spread_deg": {
    "lat": 32.35,
    "lon": 332.91
   },
   "member_spread_now_deg": {
    "lat": 0.91,
    "lon": 2.12
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-39",
   "flight_id": "SP0LND-39_2026-08-27",
   "payload_type": "WSPR",
   "seed_time": "2026-10-01 22:35:00",
   "seed_lat": 53.125,
   "seed_lon": -128.875,
   "seed_alt_m": 13700.0,
   "seed_age_h": 18.75,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 50.33359,
    "lon": 33.89712,
    "alt_m": 13807.0
   },
   "member_spread_deg": {
    "lat": 20.57,
    "lon": 116.7
   },
   "member_spread_now_deg": {
    "lat": 1.94,
    "lon": 9.12
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-4",
   "flight_id": "SP0LND-4_2026-10-01",
   "payload_type": "APRS",
   "seed_time": "2026-10-02 11:02:51",
   "seed_lat": 42.81142,
   "seed_lon": 30.62125,
   "seed_alt_m": 13604.0,
   "seed_age_h": 6.29,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 55.68721,
    "lon": -158.04377,
    "alt_m": 13048.1
   },
   "member_spread_deg": {
    "lat": 8.1,
    "lon": 33.35
   },
   "member_spread_now_deg": {
    "lat": 1.3,
    "lon": 3.26
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP0LND-6",
   "flight_id": "SP0LND-6_2026-09-06",
   "payload_type": "APRS",
   "seed_time": "2026-10-01 17:35:05",
   "seed_lat": 23.04334,
   "seed_lon": -14.77983,
   "seed_alt_m": 14721.0,
   "seed_age_h": 23.75,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 18.88184,
    "lon": 30.99518,
    "alt_m": 14668.7
   },
   "member_spread_deg": {
    "lat": 44.79,
    "lon": 150.77
   },
   "member_spread_now_deg": {
    "lat": 6.48,
    "lon": 2.59
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP2ROC-41",
   "flight_id": "SP2ROC-41_2026-01-25",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 16:51:00",
   "seed_lat": 59.375,
   "seed_lon": -74.16667,
   "seed_alt_m": 14760.0,
   "seed_age_h": 0.48,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 16:15:00",
    "lat": 63.14721,
    "lon": 44.7413,
    "alt_m": 15037.8
   },
   "member_spread_deg": {
    "lat": 11.6,
    "lon": 21.14
   },
   "member_spread_now_deg": {
    "lat": 0.01,
    "lon": 0.06
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP6MPL-11",
   "flight_id": "SP6MPL-11_2026-09-29",
   "payload_type": "APRS",
   "seed_time": "2026-09-30 12:03:16",
   "seed_lat": 47.40458,
   "seed_lon": 14.40434,
   "seed_alt_m": 7086.0,
   "seed_age_h": 53.28,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 43.10081,
    "lon": -168.12141,
    "alt_m": 6830.9
   },
   "member_spread_deg": {
    "lat": 33.94,
    "lon": 293.98
   },
   "member_spread_now_deg": {
    "lat": 12.21,
    "lon": 26.72
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP6MPL-32",
   "flight_id": "SP6MPL-32_2026-01-23",
   "payload_type": "WSPR",
   "seed_time": "2026-10-01 16:17:00",
   "seed_lat": 67.91668,
   "seed_lon": -7.04167,
   "seed_alt_m": 13160.0,
   "seed_age_h": 25.05,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 55.97476,
    "lon": -174.60019,
    "alt_m": 12431.0
   },
   "member_spread_deg": {
    "lat": 47.96,
    "lon": 352.98
   },
   "member_spread_now_deg": {
    "lat": 22.49,
    "lon": 24.92
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "SP6MPL-34",
   "flight_id": "SP6MPL-34_2025-12-03",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 12:42:00",
   "seed_lat": 33.58333,
   "seed_lon": 32.08333,
   "seed_alt_m": 13650.0,
   "seed_age_h": 4.63,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 12:15:00",
    "lat": 40.4973,
    "lon": -86.15783,
    "alt_m": 13801.3
   },
   "member_spread_deg": {
    "lat": 32.86,
    "lon": 329.09
   },
   "member_spread_now_deg": {
    "lat": 1.55,
    "lon": 1.9
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "VE3VRO-34",
   "flight_id": "VE3VRO-34_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-09-30 21:40:00",
   "seed_lat": 67.91667,
   "seed_lon": -170.45833,
   "seed_alt_m": 11910.0,
   "seed_age_h": 43.67,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 61.22759,
    "lon": -25.76425,
    "alt_m": 11925.6
   },
   "member_spread_deg": {
    "lat": 27.48,
    "lon": 179.62
   },
   "member_spread_now_deg": {
    "lat": 4.37,
    "lon": 11.6
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "VE3VRO-36",
   "flight_id": "VE3VRO-36_2026-07-30",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 02:41:00",
   "seed_lat": 50.16667,
   "seed_lon": 153.70833,
   "seed_alt_m": 12680.0,
   "seed_age_h": 14.65,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 46.06739,
    "lon": 7.70437,
    "alt_m": 13314.9
   },
   "member_spread_deg": {
    "lat": 23.57,
    "lon": 131.67
   },
   "member_spread_now_deg": {
    "lat": 1.46,
    "lon": 358.75
   },
   "display_as": "region",
   "display_reason": "member_spread"
  },
  {
   "callsign": "W7EEU-11",
   "flight_id": "W7EEU-11_2026-08-23",
   "payload_type": "APRS",
   "seed_time": "2026-10-01 16:19:25",
   "seed_lat": 63.66616,
   "seed_lon": -24.55575,
   "seed_alt_m": 11724.0,
   "seed_age_h": 25.01,
   "float_reliable": true,
   "dead_reckoned": true,
   "levels_spanned": 3,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": 59.96873,
    "lon": 117.98401,
    "alt_m": 12052.6
   },
   "member_spread_deg": {
    "lat": 14.33,
    "lon": 90.21
   },
   "member_spread_now_deg": {
    "lat": 1.9,
    "lon": 1.58
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "WD4CFN-21",
   "flight_id": "WD4CFN-21_2026-09-13",
   "payload_type": "WSPR",
   "seed_time": "2026-10-01 07:00:38",
   "seed_lat": 29.99994,
   "seed_lon": 113.33339,
   "seed_alt_m": 8540.0,
   "seed_age_h": 34.32,
   "float_reliable": false,
   "dead_reckoned": true,
   "levels_spanned": 4,
   "nominal_end": {
    "valid_time": "2026-10-09 11:30:00",
    "lat": 28.41388,
    "lon": -143.04812,
    "alt_m": 8575.9
   },
   "member_spread_deg": {
    "lat": 34.5,
    "lon": 276.5
   },
   "member_spread_now_deg": {
    "lat": 8.85,
    "lon": 17.01
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "WD4CFN-25",
   "flight_id": "WD4CFN-25_2026-09-29",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 16:51:00",
   "seed_lat": 26.47917,
   "seed_lon": -24.29167,
   "seed_alt_m": 13910.0,
   "seed_age_h": 0.48,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-09 16:15:00",
    "lat": 40.85071,
    "lon": 132.4189,
    "alt_m": 13550.9
   },
   "member_spread_deg": {
    "lat": 17.99,
    "lon": 68.03
   },
   "member_spread_now_deg": {
    "lat": 0.1,
    "lon": 0.23
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "ZL2P-1",
   "flight_id": "ZL2P-1_2026-09-28",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 10:20:00",
   "seed_lat": -44.02083,
   "seed_lon": 7.08333,
   "seed_alt_m": 11500.0,
   "seed_age_h": 7.0,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 2,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": -46.14635,
    "lon": -22.3093,
    "alt_m": 11374.9
   },
   "member_spread_deg": {
    "lat": 12.82,
    "lon": 60.86
   },
   "member_spread_now_deg": {
    "lat": 3.46,
    "lon": 2.36
   },
   "display_as": "track",
   "display_reason": "fresh"
  },
  {
   "callsign": "ZS6WBT-1",
   "flight_id": "ZS6WBT-1_2026-08-19",
   "payload_type": "WSPR",
   "seed_time": "2026-10-02 00:41:00",
   "seed_lat": -21.10417,
   "seed_lon": -129.16667,
   "seed_alt_m": 15630.0,
   "seed_age_h": 16.65,
   "float_reliable": true,
   "dead_reckoned": false,
   "levels_spanned": 1,
   "nominal_end": {
    "valid_time": "2026-10-09 11:45:00",
    "lat": -15.27349,
    "lon": -71.97648,
    "alt_m": 15701.3
   },
   "member_spread_deg": {
    "lat": 21.78,
    "lon": 153.32
   },
   "member_spread_now_deg": {
    "lat": 3.92,
    "lon": 22.47
   },
   "display_as": "track",
   "display_reason": "fresh"
  }
 ]
}