{ "generated_utc": "2026-09-22T17:28:21Z", "gfs_cycle_utc": "2026-09-22T12:00:00Z", "model": { "source": "NCEP GFS 0.50 degree", "vertical_coordinate": "constant density (isopycnic)", "horizon_hours": 494.0, "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_20260922_12Z.csv.gz", "trajectories_geojson_gz": "PBA_forecast_20260922_12Z.geojson.gz" }, "counts": { "flights": 50, "members": 9, "rows": 216297 }, "flights": [ { "callsign": "AE4ZZ-22", "flight_id": "AE4ZZ-22_2026-09-19", "payload_type": "WSPR", "seed_time": "2026-09-22 16:52:03", "seed_lat": 39.89579, "seed_lon": -52.33329, "seed_alt_m": 13560.0, "seed_age_h": 0.47, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 16:15:00", "lat": 41.9804, "lon": 57.26758, "alt_m": 13067.6 }, "member_spread_deg": { "lat": 24.25, "lon": 116.75 }, "member_spread_now_deg": { "lat": 0.06, "lon": 0.04 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "AE4ZZ-23", "flight_id": "AE4ZZ-23_2026-09-21", "payload_type": "WSPR", "seed_time": "2026-09-22 17:01:41", "seed_lat": 38.47914, "seed_lon": -74.04162, "seed_alt_m": 13440.0, "seed_age_h": 0.31, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 17:00:00", "lat": 42.00647, "lon": 75.07913, "alt_m": 13057.3 }, "member_spread_deg": { "lat": 32.16, "lon": 156.91 }, "member_spread_now_deg": { "lat": 0.21, "lon": 0.2 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "AG6NS-23", "flight_id": "AG6NS-23_2026-02-07", "payload_type": "WSPR", "seed_time": "2026-09-22 15:48:40", "seed_lat": -55.8125, "seed_lon": 20.16668, "seed_alt_m": 12090.0, "seed_age_h": 1.52, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-29 15:15:00", "lat": -70.04075, "lon": 64.73114, "alt_m": 12228.5 }, "member_spread_deg": { "lat": 19.57, "lon": 270.17 }, "member_spread_now_deg": { "lat": 0.29, "lon": 0.39 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "BSS52", "flight_id": "BSS52_2025-12-25", "payload_type": "WSPR", "seed_time": "2026-09-22 02:38:17", "seed_lat": 38.33333, "seed_lon": 174.16667, "seed_alt_m": 13760.0, "seed_age_h": 14.7, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 34.08112, "lon": -165.80298, "alt_m": 13927.2 }, "member_spread_deg": { "lat": 42.84, "lon": 306.6 }, "member_spread_now_deg": { "lat": 2.97, "lon": 5.1 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "BSS53", "flight_id": "BSS53_2026-03-09", "payload_type": "WSPR", "seed_time": "2026-09-22 05:57:18", "seed_lat": 55.04167, "seed_lon": 162.66667, "seed_alt_m": 12510.0, "seed_age_h": 11.38, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 31.49947, "lon": 17.80329, "alt_m": 13149.5 }, "member_spread_deg": { "lat": 34.9, "lon": 161.73 }, "member_spread_now_deg": { "lat": 2.21, "lon": 4.97 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "BSS54", "flight_id": "BSS54_2026-07-09", "payload_type": "WSPR", "seed_time": "2026-09-22 12:41:04", "seed_lat": 48.52083, "seed_lon": 62.16667, "seed_alt_m": 13920.0, "seed_age_h": 4.65, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-29 12:15:00", "lat": 55.80504, "lon": -89.38776, "alt_m": 13449.2 }, "member_spread_deg": { "lat": 19.2, "lon": 60.95 }, "member_spread_now_deg": { "lat": 0.52, "lon": 0.15 }, "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": 57.85, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 46.75012, "lon": -177.34521, "alt_m": 11370.7 }, "member_spread_deg": { "lat": 38.08, "lon": 348.83 }, "member_spread_now_deg": { "lat": 14.7, "lon": 45.74 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DF7PN-427", "flight_id": "DF7PN-427_2026-08-03", "payload_type": "WSPR", "seed_time": "2026-09-21 06:04:31", "seed_lat": 45.25, "seed_lon": 106.33333, "seed_alt_m": 12200.0, "seed_age_h": 35.26, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 40.23443, "lon": -62.91426, "alt_m": 12171.4 }, "member_spread_deg": { "lat": 41.04, "lon": 115.06 }, "member_spread_now_deg": { "lat": 2.64, "lon": 8.98 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DF7PN-427e", "flight_id": "DF7PN-427e_2026-08-03", "payload_type": "WSPR", "seed_time": "2026-09-20 04:45:02", "seed_lat": 44.90608, "seed_lon": 79.22761, "seed_alt_m": 12240.0, "seed_age_h": 60.58, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 47.6308, "lon": -61.48119, "alt_m": 12260.7 }, "member_spread_deg": { "lat": 43.03, "lon": 149.0 }, "member_spread_now_deg": { "lat": 3.05, "lon": 11.8 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-30", "flight_id": "DG2GG-30_2026-08-07", "payload_type": "WSPR", "seed_time": "2026-09-21 07:06:00", "seed_lat": 62.91667, "seed_lon": 23.0, "seed_alt_m": 11970.0, "seed_age_h": 34.23, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 44.38711, "lon": 111.00672, "alt_m": 12518.5 }, "member_spread_deg": { "lat": 11.96, "lon": 117.23 }, "member_spread_now_deg": { "lat": 9.41, "lon": 5.61 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-31", "flight_id": "DG2GG-31_2026-08-13", "payload_type": "WSPR", "seed_time": "2026-09-22 08:37:00", "seed_lat": 39.85417, "seed_lon": 100.41667, "seed_alt_m": 13220.0, "seed_age_h": 8.72, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 29.69092, "lon": -73.58021, "alt_m": 13536.3 }, "member_spread_deg": { "lat": 40.08, "lon": 88.23 }, "member_spread_now_deg": { "lat": 1.04, "lon": 4.37 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-32", "flight_id": "DG2GG-32_2026-09-03", "payload_type": "WSPR", "seed_time": "2026-09-22 06:46:00", "seed_lat": 43.77083, "seed_lon": 101.5, "seed_alt_m": 13410.0, "seed_age_h": 10.57, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 49.31325, "lon": -6.06166, "alt_m": 13121.4 }, "member_spread_deg": { "lat": 20.75, "lon": 86.71 }, "member_spread_now_deg": { "lat": 1.6, "lon": 1.87 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-34", "flight_id": "DG2GG-34_2026-09-15", "payload_type": "WSPR", "seed_time": "2026-09-22 03:10:00", "seed_lat": 40.60417, "seed_lon": 177.375, "seed_alt_m": 13400.0, "seed_age_h": 14.17, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 47.05742, "lon": -115.37376, "alt_m": 13078.3 }, "member_spread_deg": { "lat": 20.86, "lon": 347.17 }, "member_spread_now_deg": { "lat": 3.13, "lon": 10.32 }, "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": 100.02, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 12.0024, "lon": -31.80316, "alt_m": 15305.6 }, "member_spread_deg": { "lat": 45.85, "lon": 146.81 }, "member_spread_now_deg": { "lat": 13.22, "lon": 25.83 }, "display_as": "region", "display_reason": "seed_age" }, { "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": 105.73, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 59.71042, "lon": -38.46502, "alt_m": 14142.3 }, "member_spread_deg": { "lat": 24.43, "lon": 118.62 }, "member_spread_now_deg": { "lat": 3.23, "lon": 37.48 }, "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": 76.66, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 47.86691, "lon": -115.57725, "alt_m": 13659.0 }, "member_spread_deg": { "lat": 49.75, "lon": 355.34 }, "member_spread_now_deg": { "lat": 8.16, "lon": 355.96 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "DO3GU-8", "flight_id": "DO3GU-8_2026-08-12", "payload_type": "APRS", "seed_time": "2026-09-18 08:14:06", "seed_lat": 42.27058, "seed_lon": 26.24284, "seed_alt_m": 14576.0, "seed_age_h": 105.1, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 58.84047, "lon": -44.85698, "alt_m": 13934.4 }, "member_spread_deg": { "lat": 25.2, "lon": 106.31 }, "member_spread_now_deg": { "lat": 4.22, "lon": 32.59 }, "display_as": "region", "display_reason": "seed_age" }, { "callsign": "EI6BFW-18", "flight_id": "EI6BFW-18_2026-07-25", "payload_type": "WSPR", "seed_time": "2026-09-22 15:58:00", "seed_lat": 34.27083, "seed_lon": -85.83333, "seed_alt_m": 13560.0, "seed_age_h": 1.37, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 15:30:00", "lat": 49.97211, "lon": 119.3752, "alt_m": 12633.9 }, "member_spread_deg": { "lat": 25.31, "lon": 167.08 }, "member_spread_now_deg": { "lat": 0.42, "lon": 0.29 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "I1RFQ", "flight_id": "I1RFQ_2026-09-06", "payload_type": "WSPR", "seed_time": "2026-09-10 05:25:00", "seed_lat": 48.52083, "seed_lon": 159.54167, "seed_alt_m": 12130.0, "seed_age_h": 299.92, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 19.07578, "lon": -46.32645, "alt_m": 12805.1 }, "member_spread_deg": { "lat": 46.15, "lon": 211.8 }, "member_spread_now_deg": { "lat": 48.98, "lon": 215.21 }, "display_as": "region", "display_reason": "member_spread" }, { "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": 162.07, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 23.33135, "lon": 13.12104, "alt_m": 13804.4 }, "member_spread_deg": { "lat": 31.84, "lon": 218.15 }, "member_spread_now_deg": { "lat": 31.17, "lon": 100.84 }, "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": 60.41, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 43.39317, "lon": -67.86125, "alt_m": 12859.3 }, "member_spread_deg": { "lat": 7.59, "lon": 67.1 }, "member_spread_now_deg": { "lat": 9.39, "lon": 355.9 }, "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": 251.25, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 47.50394, "lon": -135.00928, "alt_m": 12268.0 }, "member_spread_deg": { "lat": 36.51, "lon": 268.51 }, "member_spread_now_deg": { "lat": 37.54, "lon": 182.26 }, "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": 220.32, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 51.02093, "lon": 80.90663, "alt_m": 12651.0 }, "member_spread_deg": { "lat": 60.07, "lon": 295.33 }, "member_spread_now_deg": { "lat": 30.35, "lon": 103.98 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "KI6DS-11", "flight_id": "KI6DS-11_2026-02-03", "payload_type": "WSPR", "seed_time": "2026-09-22 03:10:45", "seed_lat": 53.81245, "seed_lon": -159.37498, "seed_alt_m": 12870.0, "seed_age_h": 14.16, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 57.13084, "lon": -23.29525, "alt_m": 12874.0 }, "member_spread_deg": { "lat": 27.69, "lon": 35.92 }, "member_spread_now_deg": { "lat": 0.38, "lon": 2.89 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "KJ4AWK-1", "flight_id": "KJ4AWK-1_2026-08-22", "payload_type": "APRS", "seed_time": "2026-09-13 11:22:57", "seed_lat": 73.68216, "seed_lon": 37.14858, "seed_alt_m": 12487.0, "seed_age_h": 221.95, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 68.63716, "lon": 61.95312, "alt_m": 12385.3 }, "member_spread_deg": { "lat": 28.44, "lon": 332.56 }, "member_spread_now_deg": { "lat": 19.36, "lon": 333.78 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "KM6BWB-1", "flight_id": "KM6BWB-1_2026-09-21", "payload_type": "WSPR", "seed_time": "2026-09-22 16:53:25", "seed_lat": 44.47911, "seed_lon": -47.79162, "seed_alt_m": 12940.0, "seed_age_h": 0.44, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 17:00:00", "lat": 30.58942, "lon": 72.45446, "alt_m": 12905.3 }, "member_spread_deg": { "lat": 33.1, "lon": 73.02 }, "member_spread_now_deg": { "lat": 0.13, "lon": 0.21 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "KO4VAQ-1", "flight_id": "KO4VAQ-1_2026-09-07", "payload_type": "WSPR", "seed_time": "2026-09-22 16:33:25", "seed_lat": 24.41661, "seed_lon": -123.74999, "seed_alt_m": 13060.0, "seed_age_h": 0.78, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 16:00:00", "lat": 24.03693, "lon": -44.5629, "alt_m": 13300.3 }, "member_spread_deg": { "lat": 52.37, "lon": 127.28 }, "member_spread_now_deg": { "lat": 0.11, "lon": 0.5 }, "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": 48.31, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 28.03908, "lon": 163.46422, "alt_m": 15235.6 }, "member_spread_deg": { "lat": 18.21, "lon": 354.51 }, "member_spread_now_deg": { "lat": 5.42, "lon": 11.84 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "N0MPM-31", "flight_id": "N0MPM-31_2026-04-16", "payload_type": "WSPR", "seed_time": "2026-09-21 06:33:19", "seed_lat": 47.37495, "seed_lon": 103.37502, "seed_alt_m": 13900.0, "seed_age_h": 34.78, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 51.1093, "lon": 4.66472, "alt_m": 13982.8 }, "member_spread_deg": { "lat": 52.12, "lon": 174.73 }, "member_spread_now_deg": { "lat": 5.45, "lon": 19.63 }, "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": 17.97, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 30.08746, "lon": -178.01049, "alt_m": 13078.7 }, "member_spread_deg": { "lat": 51.5, "lon": 351.91 }, "member_spread_now_deg": { "lat": 9.16, "lon": 356.88 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "NE9JJ-11", "flight_id": "NE9JJ-11_2026-09-11", "payload_type": "WSPR", "seed_time": "2026-09-22 02:43:00", "seed_lat": 30.625, "seed_lon": -174.70833, "seed_alt_m": 13140.0, "seed_age_h": 14.62, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 29.1397, "lon": 8.55045, "alt_m": 13095.3 }, "member_spread_deg": { "lat": 14.03, "lon": 91.12 }, "member_spread_now_deg": { "lat": 4.86, "lon": 5.47 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "NQ1W-6", "flight_id": "NQ1W-6_2026-09-11", "payload_type": "WSPR", "seed_time": "2026-09-22 02:56:00", "seed_lat": 46.70833, "seed_lon": 144.16667, "seed_alt_m": 12740.0, "seed_age_h": 14.4, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 29.76075, "lon": -174.51333, "alt_m": 13289.0 }, "member_spread_deg": { "lat": 17.25, "lon": 201.44 }, "member_spread_now_deg": { "lat": 4.72, "lon": 358.42 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "PE2BZ-11", "flight_id": "PE2BZ-11_2026-09-16", "payload_type": "APRS", "seed_time": "2026-09-22 15:44:11", "seed_lat": 46.27, "seed_lon": 3.99341, "seed_alt_m": 12662.0, "seed_age_h": 1.6, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 15:15:00", "lat": 42.15864, "lon": 97.11386, "alt_m": 12414.7 }, "member_spread_deg": { "lat": 24.54, "lon": 88.18 }, "member_spread_now_deg": { "lat": 0.4, "lon": 0.28 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "SP0LND-12", "flight_id": "SP0LND-12_2026-09-19", "payload_type": "APRS", "seed_time": "2026-09-21 14:14:07", "seed_lat": 64.99734, "seed_lon": 26.84733, "seed_alt_m": 13239.0, "seed_age_h": 27.1, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 54.82332, "lon": 88.63025, "alt_m": 13539.6 }, "member_spread_deg": { "lat": 14.67, "lon": 64.18 }, "member_spread_now_deg": { "lat": 2.18, "lon": 4.35 }, "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": 170.43, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 57.68073, "lon": 77.66387, "alt_m": 13355.9 }, "member_spread_deg": { "lat": 47.26, "lon": 257.46 }, "member_spread_now_deg": { "lat": 33.41, "lon": 317.58 }, "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": 222.54, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 79.02955, "lon": -30.42768, "alt_m": 12825.6 }, "member_spread_deg": { "lat": 33.69, "lon": 267.05 }, "member_spread_now_deg": { "lat": 34.91, "lon": 269.94 }, "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": 129.81, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 19.89043, "lon": -86.59515, "alt_m": 14582.8 }, "member_spread_deg": { "lat": 51.7, "lon": 177.95 }, "member_spread_now_deg": { "lat": 11.86, "lon": 343.18 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "SP0LND-39", "flight_id": "SP0LND-39_2026-08-27", "payload_type": "WSPR", "seed_time": "2026-09-21 17:55:00", "seed_lat": 61.45833, "seed_lon": -111.41667, "seed_alt_m": 13550.0, "seed_age_h": 23.42, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 52.80085, "lon": 173.79508, "alt_m": 13587.1 }, "member_spread_deg": { "lat": 30.84, "lon": 236.35 }, "member_spread_now_deg": { "lat": 10.83, "lon": 6.28 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "SP0LND-6", "flight_id": "SP0LND-6_2026-09-06", "payload_type": "APRS", "seed_time": "2026-09-21 01:02:23", "seed_lat": 44.55234, "seed_lon": -123.39266, "seed_alt_m": 14174.0, "seed_age_h": 40.29, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 39.26761, "lon": 7.45557, "alt_m": 14190.7 }, "member_spread_deg": { "lat": 28.0, "lon": 61.65 }, "member_spread_now_deg": { "lat": 6.63, "lon": 10.36 }, "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": 218.08, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 32.93557, "lon": 28.23117, "alt_m": 14218.2 }, "member_spread_deg": { "lat": 37.63, "lon": 159.5 }, "member_spread_now_deg": { "lat": 17.84, "lon": 113.96 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "SP2ROC-41", "flight_id": "SP2ROC-41_2026-01-25", "payload_type": "WSPR", "seed_time": "2026-09-22 10:11:00", "seed_lat": 58.52083, "seed_lon": 76.70833, "seed_alt_m": 15460.0, "seed_age_h": 7.15, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 49.41165, "lon": -140.97135, "alt_m": 15083.3 }, "member_spread_deg": { "lat": 11.89, "lon": 38.7 }, "member_spread_now_deg": { "lat": 1.04, "lon": 2.01 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "SP6MPL-32", "flight_id": "SP6MPL-32_2026-01-23", "payload_type": "WSPR", "seed_time": "2026-09-21 12:32:00", "seed_lat": 33.70835, "seed_lon": 31.70833, "seed_alt_m": 14040.0, "seed_age_h": 28.8, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 37.38294, "lon": -84.41051, "alt_m": 13869.9 }, "member_spread_deg": { "lat": 29.58, "lon": 259.76 }, "member_spread_now_deg": { "lat": 3.36, "lon": 11.31 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "SP6MPL-34", "flight_id": "SP6MPL-34_2025-12-03", "payload_type": "WSPR", "seed_time": "2026-09-22 16:37:00", "seed_lat": 56.0, "seed_lon": -99.45833, "seed_alt_m": 13650.0, "seed_age_h": 0.72, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 16:00:00", "lat": 26.07062, "lon": -29.69383, "alt_m": 13997.4 }, "member_spread_deg": { "lat": 40.45, "lon": 78.09 }, "member_spread_now_deg": { "lat": 0.11, "lon": 0.23 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "VE3VRO-34", "flight_id": "VE3VRO-34_2026-07-30", "payload_type": "WSPR", "seed_time": "2026-09-15 04:40:00", "seed_lat": 72.0, "seed_lon": 103.25, "seed_alt_m": 12430.0, "seed_age_h": 180.67, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": 50.21714, "lon": 130.47579, "alt_m": 11955.1 }, "member_spread_deg": { "lat": 29.31, "lon": 173.93 }, "member_spread_now_deg": { "lat": 19.75, "lon": 288.5 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "VE3VRO-36", "flight_id": "VE3VRO-36_2026-07-30", "payload_type": "WSPR", "seed_time": "2026-09-22 15:06:00", "seed_lat": 49.89583, "seed_lon": -20.20833, "seed_alt_m": 13060.0, "seed_age_h": 2.23, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 14:30:00", "lat": 48.79542, "lon": 69.68469, "alt_m": 12869.7 }, "member_spread_deg": { "lat": 6.82, "lon": 111.3 }, "member_spread_now_deg": { "lat": 0.37, "lon": 1.47 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "W0RBO-12", "flight_id": "W0RBO-12_2026-05-02", "payload_type": "WSPR", "seed_time": "2026-09-08 21:35:23", "seed_lat": 52.33328, "seed_lon": -95.95831, "seed_alt_m": 12860.0, "seed_age_h": 331.74, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 56.11792, "lon": 32.83519, "alt_m": 13158.6 }, "member_spread_deg": { "lat": 54.21, "lon": 218.79 }, "member_spread_now_deg": { "lat": 51.56, "lon": 336.92 }, "display_as": "region", "display_reason": "member_spread" }, { "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": 189.41, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 53.27738, "lon": 24.25957, "alt_m": 12240.1 }, "member_spread_deg": { "lat": 36.59, "lon": 249.15 }, "member_spread_now_deg": { "lat": 9.72, "lon": 125.88 }, "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": 74.85, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-29 11:30:00", "lat": 60.74431, "lon": -124.89796, "alt_m": 12042.4 }, "member_spread_deg": { "lat": 29.73, "lon": 240.0 }, "member_spread_now_deg": { "lat": 12.04, "lon": 44.54 }, "display_as": "region", "display_reason": "seed_age" }, { "callsign": "WD4CFN-21", "flight_id": "WD4CFN-21_2026-09-13", "payload_type": "WSPR", "seed_time": "2026-09-22 14:25:33", "seed_lat": 23.29159, "seed_lon": -2.83323, "seed_alt_m": 13100.0, "seed_age_h": 2.91, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-29 14:00:00", "lat": 28.72296, "lon": 171.74644, "alt_m": 13176.5 }, "member_spread_deg": { "lat": 12.88, "lon": 338.49 }, "member_spread_now_deg": { "lat": 0.56, "lon": 1.25 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "ZS6WBT-1", "flight_id": "ZS6WBT-1_2026-08-19", "payload_type": "WSPR", "seed_time": "2026-09-22 05:08:30", "seed_lat": -14.08333, "seed_lon": 158.25, "seed_alt_m": 15970.0, "seed_age_h": 12.19, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-29 11:45:00", "lat": -20.63185, "lon": -140.25894, "alt_m": 15805.4 }, "member_spread_deg": { "lat": 13.58, "lon": 71.68 }, "member_spread_now_deg": { "lat": 2.03, "lon": 2.11 }, "display_as": "track", "display_reason": "fresh" } ] }