{ "generated_utc": "2026-08-01T23:27:39Z", "gfs_cycle_utc": "2026-08-01T18:00:00Z", "model": { "source": "NCEP GFS 0.50 degree", "vertical_coordinate": "constant density (isopycnic)", "horizon_hours": 496.0, "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_20260801_18Z.csv.gz", "trajectories_geojson_gz": "PBA_forecast_20260801_18Z.geojson.gz" }, "counts": { "flights": 44, "members": 9, "rows": 227988 }, "flights": [ { "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": 333.66, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 20.03832, "lon": -112.17452, "alt_m": 14243.0 }, "member_spread_deg": { "lat": 69.18, "lon": 205.99 }, "member_spread_now_deg": { "lat": 44.61, "lon": 70.58 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "AG6NS-23", "flight_id": "AG6NS-23_2026-02-07", "payload_type": "WSPR", "seed_time": "2026-08-01 22:53:40", "seed_lat": -53.25, "seed_lon": -120.62499, "seed_alt_m": 12270.0, "seed_age_h": 0.44, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-08-08 23:00:00", "lat": -37.65952, "lon": 142.66529, "alt_m": 12511.7 }, "member_spread_deg": { "lat": 25.18, "lon": 8.06 }, "member_spread_now_deg": { "lat": 0.06, "lon": 0.21 }, "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": 197.67, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 50.67569, "lon": -119.6259, "alt_m": 13424.9 }, "member_spread_deg": { "lat": 36.79, "lon": 145.69 }, "member_spread_now_deg": { "lat": 16.53, "lon": 351.68 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "BSS53", "flight_id": "BSS53_2026-03-09", "payload_type": "WSPR", "seed_time": "2026-08-01 22:56:48", "seed_lat": 65.6875, "seed_lon": 89.0, "seed_alt_m": 12640.0, "seed_age_h": 0.39, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 23:00:00", "lat": 76.11309, "lon": 12.32704, "alt_m": 12542.2 }, "member_spread_deg": { "lat": 32.78, "lon": 104.19 }, "member_spread_now_deg": { "lat": 0.05, "lon": 0.77 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "BSS54", "flight_id": "BSS54_2026-07-09", "payload_type": "WSPR", "seed_time": "2026-08-01 18:41:48", "seed_lat": 29.27083, "seed_lon": -39.54167, "seed_alt_m": 14715.0, "seed_age_h": 4.64, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 18:15:00", "lat": 55.12428, "lon": 90.61253, "alt_m": 13960.5 }, "member_spread_deg": { "lat": 34.95, "lon": 158.59 }, "member_spread_now_deg": { "lat": 0.06, "lon": 0.21 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-23", "flight_id": "DG2GG-23_2026-05-23", "payload_type": "WSPR", "seed_time": "2026-08-01 21:59:00", "seed_lat": 27.64583, "seed_lon": -165.5, "seed_alt_m": 13080.0, "seed_age_h": 1.35, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 21:30:00", "lat": 46.0886, "lon": -147.93336, "alt_m": 13020.2 }, "member_spread_deg": { "lat": 21.88, "lon": 98.73 }, "member_spread_now_deg": { "lat": 0.18, "lon": 0.19 }, "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": 183.97, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 55.45079, "lon": 6.57546, "alt_m": 12885.4 }, "member_spread_deg": { "lat": 31.37, "lon": 199.94 }, "member_spread_now_deg": { "lat": 28.78, "lon": 103.85 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "DG2GG-27", "flight_id": "DG2GG-27_2026-07-04", "payload_type": "WSPR", "seed_time": "2026-08-01 22:23:00", "seed_lat": 20.33333, "seed_lon": -173.79167, "seed_alt_m": 14000.0, "seed_age_h": 0.95, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-08-08 22:00:00", "lat": 36.35784, "lon": -46.32812, "alt_m": 13681.7 }, "member_spread_deg": { "lat": 40.81, "lon": 97.29 }, "member_spread_now_deg": { "lat": 0.1, "lon": 0.63 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-29", "flight_id": "DG2GG-29_2026-07-28", "payload_type": "WSPR", "seed_time": "2026-08-01 09:02:00", "seed_lat": 43.9375, "seed_lon": 102.125, "seed_alt_m": 13020.0, "seed_age_h": 14.3, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 49.61046, "lon": -73.23629, "alt_m": 13128.3 }, "member_spread_deg": { "lat": 50.29, "lon": 306.92 }, "member_spread_now_deg": { "lat": 3.62, "lon": 4.45 }, "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": 104.65, "float_reliable": false, "dead_reckoned": true, "levels_spanned": 4, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 22.99604, "lon": 10.14986, "alt_m": 9245.7 }, "member_spread_deg": { "lat": 35.0, "lon": 298.5 }, "member_spread_now_deg": { "lat": 31.72, "lon": 67.9 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "DL0MMZ", "flight_id": "DL0MMZ_2026-07-24", "payload_type": "OTHER", "seed_time": "2026-07-25 15:59:04", "seed_lat": 36.60802, "seed_lon": 30.46457, "seed_alt_m": 8441.0, "seed_age_h": 175.35, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 4, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 45.9951, "lon": -60.09104, "alt_m": 8623.8 }, "member_spread_deg": { "lat": 24.35, "lon": 334.33 }, "member_spread_now_deg": { "lat": 31.09, "lon": 71.48 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "DL0MZ-493", "flight_id": "DL0MZ-493_2026-07-25", "payload_type": "WSPR", "seed_time": "2026-07-29 07:36:01", "seed_lat": 64.20833, "seed_lon": 58.16667, "seed_alt_m": 12170.0, "seed_age_h": 87.73, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 29.90993, "lon": -99.68752, "alt_m": 12763.0 }, "member_spread_deg": { "lat": 36.01, "lon": 94.54 }, "member_spread_now_deg": { "lat": 22.24, "lon": 31.64 }, "display_as": "region", "display_reason": "seed_age" }, { "callsign": "DL0MZ-493e", "flight_id": "DL0MZ-493e_2026-07-25", "payload_type": "WSPR", "seed_time": "2026-07-29 07:27:02", "seed_lat": 64.15625, "seed_lon": 58.08889, "seed_alt_m": 12170.0, "seed_age_h": 87.88, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 48.73785, "lon": -18.81091, "alt_m": 12545.1 }, "member_spread_deg": { "lat": 31.38, "lon": 140.63 }, "member_spread_now_deg": { "lat": 22.44, "lon": 31.42 }, "display_as": "region", "display_reason": "seed_age" }, { "callsign": "DN3LEO-13", "flight_id": "DN3LEO-13_2026-04-12", "payload_type": "WSPR", "seed_time": "2026-08-01 08:53:00", "seed_lat": 67.89583, "seed_lon": 53.04167, "seed_alt_m": 12400.0, "seed_age_h": 14.45, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 71.94272, "lon": 143.50157, "alt_m": 12380.5 }, "member_spread_deg": { "lat": 39.48, "lon": 316.68 }, "member_spread_now_deg": { "lat": 5.19, "lon": 14.41 }, "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": 203.07, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 73.96958, "lon": -76.82487, "alt_m": 14930.1 }, "member_spread_deg": { "lat": 28.41, "lon": 216.16 }, "member_spread_now_deg": { "lat": 28.8, "lon": 346.24 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "EI6BFW-18", "flight_id": "EI6BFW-18_2026-07-25", "payload_type": "WSPR", "seed_time": "2026-08-01 21:18:00", "seed_lat": 53.83333, "seed_lon": 148.58333, "seed_alt_m": 12945.0, "seed_age_h": 2.03, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 20:45:00", "lat": 81.16919, "lon": 11.15645, "alt_m": 12416.2 }, "member_spread_deg": { "lat": 35.83, "lon": 168.18 }, "member_spread_now_deg": { "lat": 0.12, "lon": 0.78 }, "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": 227.08, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 41.85024, "lon": -127.71081, "alt_m": 14204.4 }, "member_spread_deg": { "lat": 67.68, "lon": 349.68 }, "member_spread_now_deg": { "lat": 42.61, "lon": 292.94 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "K5NOT-11", "flight_id": "K5NOT-11_2026-06-20", "payload_type": "WSPR", "seed_time": "2026-08-01 15:25:37", "seed_lat": 40.99994, "seed_lon": 4.45834, "seed_alt_m": 13180.0, "seed_age_h": 7.91, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 64.31391, "lon": 152.09267, "alt_m": 12838.4 }, "member_spread_deg": { "lat": 26.97, "lon": 45.63 }, "member_spread_now_deg": { "lat": 0.97, "lon": 2.52 }, "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": 136.9, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 30.12559, "lon": 165.13873, "alt_m": 13147.5 }, "member_spread_deg": { "lat": 63.19, "lon": 344.07 }, "member_spread_now_deg": { "lat": 33.47, "lon": 86.29 }, "display_as": "region", "display_reason": "member_spread" }, { "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": 313.38, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": -28.93677, "lon": -106.28414, "alt_m": 14419.4 }, "member_spread_deg": { "lat": 45.29, "lon": 208.92 }, "member_spread_now_deg": { "lat": 30.94, "lon": 253.23 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "KC3LBR-449", "flight_id": "KC3LBR-449_2026-07-06", "payload_type": "WSPR", "seed_time": "2026-08-01 22:57:03", "seed_lat": 65.70833, "seed_lon": -129.20833, "seed_alt_m": 13250.0, "seed_age_h": 0.38, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 23:00:00", "lat": 54.6987, "lon": -21.45627, "alt_m": 13409.6 }, "member_spread_deg": { "lat": 32.84, "lon": 79.77 }, "member_spread_now_deg": { "lat": 0.21, "lon": 0.08 }, "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": 110.2, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 51.84587, "lon": 138.56343, "alt_m": 13157.0 }, "member_spread_deg": { "lat": 31.53, "lon": 322.17 }, "member_spread_now_deg": { "lat": 25.05, "lon": 103.27 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "KC5TRB-1", "flight_id": "KC5TRB-1_2026-06-20", "payload_type": "WSPR", "seed_time": "2026-07-31 09:45:43", "seed_lat": 65.74995, "seed_lon": 26.6667, "seed_alt_m": 12780.0, "seed_age_h": 37.57, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 61.72167, "lon": 176.60696, "alt_m": 12668.7 }, "member_spread_deg": { "lat": 20.82, "lon": 353.15 }, "member_spread_now_deg": { "lat": 21.83, "lon": 11.76 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "KE8RES-8", "flight_id": "KE8RES-8_2026-06-20", "payload_type": "WSPR", "seed_time": "2026-08-01 22:51:00", "seed_lat": 51.64583, "seed_lon": -129.58333, "seed_alt_m": 12140.0, "seed_age_h": 0.48, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-08-08 22:15:00", "lat": 53.9039, "lon": -88.60421, "alt_m": 12205.5 }, "member_spread_deg": { "lat": 24.59, "lon": 45.64 }, "member_spread_now_deg": { "lat": 0.11, "lon": 0.02 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "KE9DAB-11", "flight_id": "KE9DAB-11_2026-07-29", "payload_type": "WSPR", "seed_time": "2026-08-01 19:11:00", "seed_lat": 31.0625, "seed_lon": -34.0, "seed_alt_m": 12640.0, "seed_age_h": 4.15, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 18:45:00", "lat": 49.08208, "lon": 47.37838, "alt_m": 12280.4 }, "member_spread_deg": { "lat": 27.86, "lon": 141.75 }, "member_spread_now_deg": { "lat": 0.45, "lon": 0.84 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "KI1TEN-1", "flight_id": "KI1TEN-1_2026-07-23", "payload_type": "WSPR", "seed_time": "2026-08-01 22:25:27", "seed_lat": 23.97912, "seed_lon": -103.83329, "seed_alt_m": 12420.0, "seed_age_h": 0.91, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 22:00:00", "lat": 14.72762, "lon": -88.98224, "alt_m": 12401.3 }, "member_spread_deg": { "lat": 14.81, "lon": 22.28 }, "member_spread_now_deg": { "lat": 0.1, "lon": 0.06 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "KI6DS-11", "flight_id": "KI6DS-11_2026-02-03", "payload_type": "WSPR", "seed_time": "2026-08-01 15:35:45", "seed_lat": 73.85411, "seed_lon": 47.70835, "seed_alt_m": 13120.0, "seed_age_h": 7.74, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 63.01427, "lon": 76.58925, "alt_m": 12867.6 }, "member_spread_deg": { "lat": 22.82, "lon": 166.88 }, "member_spread_now_deg": { "lat": 1.36, "lon": 12.53 }, "display_as": "track", "display_reason": "fresh" }, { "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": 327.4, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 59.79404, "lon": -166.69203, "alt_m": 12833.0 }, "member_spread_deg": { "lat": 21.34, "lon": 309.12 }, "member_spread_now_deg": { "lat": 62.86, "lon": 156.63 }, "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": 263.45, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": -27.37067, "lon": -7.07709, "alt_m": 14421.0 }, "member_spread_deg": { "lat": 41.06, "lon": 180.39 }, "member_spread_now_deg": { "lat": 36.78, "lon": 199.89 }, "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": 154.56, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 8.44257, "lon": 105.70455, "alt_m": 12173.0 }, "member_spread_deg": { "lat": 47.14, "lon": 295.03 }, "member_spread_now_deg": { "lat": 47.23, "lon": 48.52 }, "display_as": "region", "display_reason": "seed_age" }, { "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": 154.01, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 60.56471, "lon": -59.54999, "alt_m": 13649.9 }, "member_spread_deg": { "lat": 40.21, "lon": 241.11 }, "member_spread_now_deg": { "lat": 16.68, "lon": 51.63 }, "display_as": "region", "display_reason": "seed_age" }, { "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": 249.33, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 40.81476, "lon": 27.92274, "alt_m": 14525.5 }, "member_spread_deg": { "lat": 72.59, "lon": 255.49 }, "member_spread_now_deg": { "lat": 48.55, "lon": 92.87 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "SP2ROC-41", "flight_id": "SP2ROC-41_2026-01-25", "payload_type": "WSPR", "seed_time": "2026-08-01 12:55:00", "seed_lat": 69.16667, "seed_lon": 47.875, "seed_alt_m": 15400.0, "seed_age_h": 10.42, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": 50.84961, "lon": 175.59622, "alt_m": 15676.8 }, "member_spread_deg": { "lat": 25.84, "lon": 353.67 }, "member_spread_now_deg": { "lat": 0.62, "lon": 4.38 }, "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": 284.05, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": -27.45751, "lon": 56.40272, "alt_m": 13878.4 }, "member_spread_deg": { "lat": 31.69, "lon": 311.74 }, "member_spread_now_deg": { "lat": 20.7, "lon": 266.38 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "SP6MPL-34", "flight_id": "SP6MPL-34_2025-12-03", "payload_type": "WSPR", "seed_time": "2026-07-31 18:52:00", "seed_lat": 74.5625, "seed_lon": -160.0, "seed_alt_m": 12890.0, "seed_age_h": 28.47, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 52.44189, "lon": -178.32246, "alt_m": 13305.9 }, "member_spread_deg": { "lat": 16.23, "lon": 349.37 }, "member_spread_now_deg": { "lat": 7.17, "lon": 198.71 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "VE3VRO-36", "flight_id": "VE3VRO-36_2026-07-30", "payload_type": "WSPR", "seed_time": "2026-08-01 20:21:00", "seed_lat": 29.3125, "seed_lon": -56.125, "seed_alt_m": 13460.0, "seed_age_h": 2.98, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 19:45:00", "lat": 30.27839, "lon": -82.54468, "alt_m": 13599.7 }, "member_spread_deg": { "lat": 34.24, "lon": 182.3 }, "member_spread_now_deg": { "lat": 0.43, "lon": 0.78 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "W0DLK-1", "flight_id": "W0DLK-1_2026-06-20", "payload_type": "WSPR", "seed_time": "2026-07-21 06:43:47", "seed_lat": 46.18745, "seed_lon": 121.75004, "seed_alt_m": 12630.0, "seed_age_h": 280.6, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 42.68106, "lon": -19.10269, "alt_m": 12906.6 }, "member_spread_deg": { "lat": 65.5, "lon": 299.12 }, "member_spread_now_deg": { "lat": 52.08, "lon": 187.05 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "W0RBO-12", "flight_id": "W0RBO-12_2026-05-02", "payload_type": "WSPR", "seed_time": "2026-08-01 22:25:23", "seed_lat": 43.39578, "seed_lon": -88.08331, "seed_alt_m": 13540.0, "seed_age_h": 0.91, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 22:00:00", "lat": 30.91451, "lon": -82.0217, "alt_m": 13924.0 }, "member_spread_deg": { "lat": 33.71, "lon": 182.12 }, "member_spread_now_deg": { "lat": 0.15, "lon": 0.39 }, "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": 319.46, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 60.90344, "lon": -67.06316, "alt_m": 12453.6 }, "member_spread_deg": { "lat": 32.78, "lon": 288.91 }, "member_spread_now_deg": { "lat": 21.59, "lon": 172.09 }, "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": 321.07, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 38.93253, "lon": -45.81827, "alt_m": 13482.3 }, "member_spread_deg": { "lat": 28.92, "lon": 324.22 }, "member_spread_now_deg": { "lat": 25.52, "lon": 295.35 }, "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": 154.5, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": 55.46259, "lon": -112.22218, "alt_m": 11559.8 }, "member_spread_deg": { "lat": 50.19, "lon": 287.22 }, "member_spread_now_deg": { "lat": 40.6, "lon": 61.63 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "ZS6SRC-37", "flight_id": "ZS6SRC-37_2026-07-15", "payload_type": "WSPR", "seed_time": "2026-07-31 04:34:00", "seed_lat": -23.70833, "seed_lon": 149.29167, "seed_alt_m": 12380.0, "seed_age_h": 42.77, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": -10.59134, "lon": -4.84279, "alt_m": 12651.3 }, "member_spread_deg": { "lat": 18.92, "lon": 122.45 }, "member_spread_now_deg": { "lat": 16.42, "lon": 59.56 }, "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": 128.0, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:45:00", "lat": -3.89643, "lon": -125.70121, "alt_m": 13163.3 }, "member_spread_deg": { "lat": 24.63, "lon": 167.06 }, "member_spread_now_deg": { "lat": 24.14, "lon": 350.91 }, "display_as": "region", "display_reason": "member_spread" }, { "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": 309.45, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-08-08 17:30:00", "lat": -33.39838, "lon": 166.19686, "alt_m": 12813.2 }, "member_spread_deg": { "lat": 22.56, "lon": 264.45 }, "member_spread_now_deg": { "lat": 14.74, "lon": 328.61 }, "display_as": "region", "display_reason": "member_spread" } ] }