{ "generated_utc": "2026-09-21T11:28:00Z", "gfs_cycle_utc": "2026-09-21T06:00:00Z", "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_20260921_06Z.csv.gz", "trajectories_geojson_gz": "PBA_forecast_20260921_06Z.geojson.gz" }, "counts": { "flights": 51, "members": 9, "rows": 223596 }, "flights": [ { "callsign": "AE4ZZ-22", "flight_id": "AE4ZZ-22_2026-09-19", "payload_type": "WSPR", "seed_time": "2026-09-20 19:53:45", "seed_lat": 36.85412, "seed_lon": -81.16661, "seed_alt_m": 13520.0, "seed_age_h": 15.44, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 26.09558, "lon": 12.86471, "alt_m": 13461.8 }, "member_spread_deg": { "lat": 25.69, "lon": 18.46 }, "member_spread_now_deg": { "lat": 1.41, "lon": 5.01 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "AG6NS-23", "flight_id": "AG6NS-23_2026-02-07", "payload_type": "WSPR", "seed_time": "2026-09-20 00:18:40", "seed_lat": -74.29167, "seed_lon": -123.99999, "seed_alt_m": 12180.0, "seed_age_h": 35.02, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": -87.33171, "lon": -120.4251, "alt_m": 11905.0 }, "member_spread_deg": { "lat": 35.92, "lon": 141.62 }, "member_spread_now_deg": { "lat": 11.35, "lon": 9.3 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "AI4SR-1", "flight_id": "AI4SR-1_2026-09-03", "payload_type": "APRS", "seed_time": "2026-09-07 13:29:52", "seed_lat": 11.02275, "seed_lon": -74.40442, "seed_alt_m": 12430.0, "seed_age_h": 333.84, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": -20.40779, "lon": -78.56441, "alt_m": 12362.4 }, "member_spread_deg": { "lat": 66.66, "lon": 337.75 }, "member_spread_now_deg": { "lat": 53.6, "lon": 192.95 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "AI4SR-2", "flight_id": "AI4SR-2_2026-09-04", "payload_type": "APRS", "seed_time": "2026-09-07 15:52:34", "seed_lat": 11.26191, "seed_lon": -74.64716, "seed_alt_m": 13006.0, "seed_age_h": 331.46, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 21.8881, "lon": -173.21807, "alt_m": 13008.1 }, "member_spread_deg": { "lat": 59.4, "lon": 336.15 }, "member_spread_now_deg": { "lat": 48.42, "lon": 163.85 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "BSS52", "flight_id": "BSS52_2025-12-25", "payload_type": "WSPR", "seed_time": "2026-09-21 03:12:18", "seed_lat": 41.02083, "seed_lon": 122.95833, "seed_alt_m": 13410.0, "seed_age_h": 8.13, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 27.29914, "lon": -169.79948, "alt_m": 13662.1 }, "member_spread_deg": { "lat": 36.71, "lon": 310.34 }, "member_spread_now_deg": { "lat": 1.5, "lon": 4.27 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "BSS53", "flight_id": "BSS53_2026-03-09", "payload_type": "WSPR", "seed_time": "2026-09-21 09:08:18", "seed_lat": 47.3125, "seed_lon": 120.20833, "seed_alt_m": 12730.0, "seed_age_h": 2.2, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 08:45:00", "lat": 66.67915, "lon": 29.46767, "alt_m": 12823.3 }, "member_spread_deg": { "lat": 28.78, "lon": 138.32 }, "member_spread_now_deg": { "lat": 0.44, "lon": 0.56 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "BSS54", "flight_id": "BSS54_2026-07-09", "payload_type": "WSPR", "seed_time": "2026-09-18 15:23:18", "seed_lat": 40.79167, "seed_lon": 19.75, "seed_alt_m": 14090.0, "seed_age_h": 67.95, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 53.12253, "lon": -139.71134, "alt_m": 13412.8 }, "member_spread_deg": { "lat": 24.47, "lon": 344.34 }, "member_spread_now_deg": { "lat": 8.89, "lon": 30.59 }, "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": 27.85, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 31.83679, "lon": 65.98425, "alt_m": 11452.3 }, "member_spread_deg": { "lat": 15.45, "lon": 209.0 }, "member_spread_now_deg": { "lat": 2.82, "lon": 9.16 }, "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": 5.26, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 41.39332, "lon": -63.12064, "alt_m": 12072.4 }, "member_spread_deg": { "lat": 30.83, "lon": 128.09 }, "member_spread_now_deg": { "lat": 0.18, "lon": 0.42 }, "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": 30.58, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 40.62996, "lon": -64.19585, "alt_m": 12047.4 }, "member_spread_deg": { "lat": 36.69, "lon": 129.87 }, "member_spread_now_deg": { "lat": 2.59, "lon": 3.0 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-25", "flight_id": "DG2GG-25_2026-06-15", "payload_type": "WSPR", "seed_time": "2026-09-07 21:12:00", "seed_lat": 24.22917, "seed_lon": -100.08333, "seed_alt_m": 13800.0, "seed_age_h": 326.13, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 20.9307, "lon": 19.61924, "alt_m": 13900.1 }, "member_spread_deg": { "lat": 55.02, "lon": 302.9 }, "member_spread_now_deg": { "lat": 39.29, "lon": 207.94 }, "display_as": "region", "display_reason": "member_spread" }, { "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": 4.23, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-28 06:30:00", "lat": 45.21948, "lon": 31.02894, "alt_m": 12782.3 }, "member_spread_deg": { "lat": 38.12, "lon": 78.53 }, "member_spread_now_deg": { "lat": 0.18, "lon": 0.62 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-31", "flight_id": "DG2GG-31_2026-08-13", "payload_type": "WSPR", "seed_time": "2026-09-21 10:17:00", "seed_lat": 39.79167, "seed_lon": 73.16667, "seed_alt_m": 13180.0, "seed_age_h": 1.05, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 09:45:00", "lat": 56.17388, "lon": -55.60587, "alt_m": 12945.7 }, "member_spread_deg": { "lat": 19.8, "lon": 77.16 }, "member_spread_now_deg": { "lat": 0.21, "lon": 0.15 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-32", "flight_id": "DG2GG-32_2026-09-03", "payload_type": "WSPR", "seed_time": "2026-09-21 07:46:00", "seed_lat": 43.47917, "seed_lon": 76.75, "seed_alt_m": 13400.0, "seed_age_h": 3.57, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 07:15:00", "lat": 68.5073, "lon": -84.8822, "alt_m": 13006.0 }, "member_spread_deg": { "lat": 18.33, "lon": 87.56 }, "member_spread_now_deg": { "lat": 0.6, "lon": 0.89 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "DG2GG-34", "flight_id": "DG2GG-34_2026-09-15", "payload_type": "WSPR", "seed_time": "2026-09-21 06:15:00", "seed_lat": 43.35417, "seed_lon": 129.79167, "seed_alt_m": 13080.0, "seed_age_h": 5.08, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 26.75458, "lon": -171.24678, "alt_m": 13496.4 }, "member_spread_deg": { "lat": 41.01, "lon": 311.28 }, "member_spread_now_deg": { "lat": 0.88, "lon": 2.85 }, "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": 70.02, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 16.42433, "lon": -39.76802, "alt_m": 15284.0 }, "member_spread_deg": { "lat": 45.29, "lon": 92.44 }, "member_spread_now_deg": { "lat": 12.18, "lon": 15.27 }, "display_as": "track", "display_reason": "fresh" }, { "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": 75.73, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 71.31833, "lon": -67.61195, "alt_m": 14208.8 }, "member_spread_deg": { "lat": 8.94, "lon": 68.95 }, "member_spread_now_deg": { "lat": 6.94, "lon": 14.48 }, "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": 46.66, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 35.6129, "lon": -127.3027, "alt_m": 14112.8 }, "member_spread_deg": { "lat": 41.61, "lon": 88.62 }, "member_spread_now_deg": { "lat": 2.72, "lon": 27.99 }, "display_as": "track", "display_reason": "fresh" }, { "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": 75.1, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 58.61472, "lon": -86.7079, "alt_m": 13838.6 }, "member_spread_deg": { "lat": 24.84, "lon": 295.79 }, "member_spread_now_deg": { "lat": 3.27, "lon": 16.61 }, "display_as": "region", "display_reason": "seed_age" }, { "callsign": "EI6BFW-18", "flight_id": "EI6BFW-18_2026-07-25", "payload_type": "WSPR", "seed_time": "2026-09-20 23:13:00", "seed_lat": 34.83333, "seed_lon": -114.83333, "seed_alt_m": 13480.0, "seed_age_h": 12.12, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 62.44074, "lon": 35.1506, "alt_m": 13128.7 }, "member_spread_deg": { "lat": 41.08, "lon": 81.09 }, "member_spread_now_deg": { "lat": 1.2, "lon": 5.61 }, "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": 269.92, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 34.61799, "lon": -48.63316, "alt_m": 12771.7 }, "member_spread_deg": { "lat": 62.57, "lon": 218.7 }, "member_spread_now_deg": { "lat": 37.0, "lon": 251.09 }, "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": 132.07, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 34.02247, "lon": -44.94183, "alt_m": 13818.0 }, "member_spread_deg": { "lat": 26.07, "lon": 150.11 }, "member_spread_now_deg": { "lat": 31.06, "lon": 90.69 }, "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": 30.41, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 47.40953, "lon": -35.00364, "alt_m": 12974.5 }, "member_spread_deg": { "lat": 21.43, "lon": 72.43 }, "member_spread_now_deg": { "lat": 5.53, "lon": 4.11 }, "display_as": "track", "display_reason": "fresh" }, { "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": 221.25, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 44.68385, "lon": -179.24393, "alt_m": 12561.2 }, "member_spread_deg": { "lat": 26.53, "lon": 347.39 }, "member_spread_now_deg": { "lat": 26.6, "lon": 189.73 }, "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": 190.32, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 54.15685, "lon": 69.79878, "alt_m": 12831.0 }, "member_spread_deg": { "lat": 43.54, "lon": 205.13 }, "member_spread_now_deg": { "lat": 15.72, "lon": 56.69 }, "display_as": "region", "display_reason": "seed_age" }, { "callsign": "KI6DS-11", "flight_id": "KI6DS-11_2026-02-03", "payload_type": "WSPR", "seed_time": "2026-09-21 03:25:45", "seed_lat": 62.87495, "seed_lon": -174.83331, "seed_alt_m": 12840.0, "seed_age_h": 7.91, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 61.46616, "lon": -14.21521, "alt_m": 12728.6 }, "member_spread_deg": { "lat": 13.39, "lon": 38.94 }, "member_spread_now_deg": { "lat": 0.82, "lon": 1.32 }, "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": 191.95, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 63.3496, "lon": -14.93728, "alt_m": 11983.3 }, "member_spread_deg": { "lat": 14.96, "lon": 270.32 }, "member_spread_now_deg": { "lat": 18.44, "lon": 305.85 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "KO4VAQ-1", "flight_id": "KO4VAQ-1_2026-09-07", "payload_type": "WSPR", "seed_time": "2026-09-21 01:43:25", "seed_lat": 28.39578, "seed_lon": -160.99999, "seed_alt_m": 13300.0, "seed_age_h": 9.61, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 31.74605, "lon": -16.53672, "alt_m": 13220.6 }, "member_spread_deg": { "lat": 26.53, "lon": 62.63 }, "member_spread_now_deg": { "lat": 4.04, "lon": 5.2 }, "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": 18.31, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 27.27924, "lon": 150.84784, "alt_m": 15260.3 }, "member_spread_deg": { "lat": 31.86, "lon": 43.89 }, "member_spread_now_deg": { "lat": 4.2, "lon": 5.65 }, "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": 4.78, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-28 06:00:00", "lat": 50.2023, "lon": -3.13443, "alt_m": 13858.2 }, "member_spread_deg": { "lat": 22.83, "lon": 134.86 }, "member_spread_now_deg": { "lat": 0.7, "lon": 2.36 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "N4TVV-4", "flight_id": "N4TVV-4_2026-09-05", "payload_type": "APRS", "seed_time": "2026-09-21 07:56:05", "seed_lat": 35.96634, "seed_lon": 122.60608, "seed_alt_m": 12947.0, "seed_age_h": 3.4, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 07:30:00", "lat": 4.858, "lon": 112.21638, "alt_m": 13128.9 }, "member_spread_deg": { "lat": 39.47, "lon": 320.47 }, "member_spread_now_deg": { "lat": 0.83, "lon": 1.03 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "NE9JJ-11", "flight_id": "NE9JJ-11_2026-09-11", "payload_type": "WSPR", "seed_time": "2026-09-21 04:05:30", "seed_lat": 27.125, "seed_lon": 170.41667, "seed_alt_m": 13115.0, "seed_age_h": 7.24, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 44.68054, "lon": -62.8625, "alt_m": 12873.6 }, "member_spread_deg": { "lat": 30.4, "lon": 67.48 }, "member_spread_now_deg": { "lat": 0.81, "lon": 1.56 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "NQ1W-6", "flight_id": "NQ1W-6_2026-09-11", "payload_type": "WSPR", "seed_time": "2026-09-21 05:41:00", "seed_lat": 39.77083, "seed_lon": 105.16667, "seed_alt_m": 13060.0, "seed_age_h": 5.65, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 32.03945, "lon": -170.21558, "alt_m": 13262.1 }, "member_spread_deg": { "lat": 24.14, "lon": 352.35 }, "member_spread_now_deg": { "lat": 0.49, "lon": 2.11 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "PE2BZ-11", "flight_id": "PE2BZ-11_2026-09-16", "payload_type": "APRS", "seed_time": "2026-09-21 11:02:26", "seed_lat": 43.19792, "seed_lon": -0.04558, "seed_alt_m": 12863.0, "seed_age_h": 0.29, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 11:00:00", "lat": 35.60298, "lon": 71.24541, "alt_m": 12447.6 }, "member_spread_deg": { "lat": 21.75, "lon": 48.21 }, "member_spread_now_deg": { "lat": 0.08, "lon": 0.13 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "SP0LND-12", "flight_id": "SP0LND-12_2026-09-19", "payload_type": "APRS", "seed_time": "2026-09-21 11:03:22", "seed_lat": 65.3855, "seed_lon": 25.60492, "seed_alt_m": 13177.0, "seed_age_h": 0.28, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 11:00:00", "lat": 45.51612, "lon": 118.9203, "alt_m": 13745.8 }, "member_spread_deg": { "lat": 25.06, "lon": 94.23 }, "member_spread_now_deg": { "lat": 0.04, "lon": 0.04 }, "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": 140.43, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 49.97899, "lon": 27.0711, "alt_m": 13726.6 }, "member_spread_deg": { "lat": 26.92, "lon": 271.55 }, "member_spread_now_deg": { "lat": 39.01, "lon": 289.25 }, "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": 192.54, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 84.2572, "lon": -67.09739, "alt_m": 12732.1 }, "member_spread_deg": { "lat": 22.31, "lon": 350.32 }, "member_spread_now_deg": { "lat": 36.15, "lon": 272.74 }, "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": 99.81, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 37.30534, "lon": -95.0807, "alt_m": 14512.1 }, "member_spread_deg": { "lat": 41.5, "lon": 39.62 }, "member_spread_now_deg": { "lat": 9.87, "lon": 35.15 }, "display_as": "region", "display_reason": "seed_age" }, { "callsign": "SP0LND-39", "flight_id": "SP0LND-39_2026-08-27", "payload_type": "WSPR", "seed_time": "2026-09-20 23:50:00", "seed_lat": 47.14583, "seed_lon": -138.125, "seed_alt_m": 13650.0, "seed_age_h": 11.5, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 60.08257, "lon": 87.30742, "alt_m": 13495.7 }, "member_spread_deg": { "lat": 30.49, "lon": 110.39 }, "member_spread_now_deg": { "lat": 6.16, "lon": 8.78 }, "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": 10.29, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 27.5642, "lon": -32.40961, "alt_m": 14619.5 }, "member_spread_deg": { "lat": 16.03, "lon": 39.91 }, "member_spread_now_deg": { "lat": 2.3, "lon": 2.6 }, "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": 188.08, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 38.91355, "lon": 9.49784, "alt_m": 14214.8 }, "member_spread_deg": { "lat": 48.67, "lon": 124.44 }, "member_spread_now_deg": { "lat": 19.52, "lon": 349.38 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "SP2ROC-41", "flight_id": "SP2ROC-41_2026-01-25", "payload_type": "WSPR", "seed_time": "2026-09-21 10:21:00", "seed_lat": 63.02083, "seed_lon": 64.125, "seed_alt_m": 15400.0, "seed_age_h": 0.98, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 09:45:00", "lat": 48.20201, "lon": -176.07201, "alt_m": 15257.5 }, "member_spread_deg": { "lat": 6.91, "lon": 356.97 }, "member_spread_now_deg": { "lat": 0.04, "lon": 0.45 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "SP6MPL-32", "flight_id": "SP6MPL-32_2026-01-23", "payload_type": "WSPR", "seed_time": "2026-09-21 08:27:00", "seed_lat": 33.27085, "seed_lon": 28.83333, "seed_alt_m": 14040.0, "seed_age_h": 2.88, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-28 08:00:00", "lat": 43.36702, "lon": -100.46119, "alt_m": 13747.4 }, "member_spread_deg": { "lat": 26.14, "lon": 289.33 }, "member_spread_now_deg": { "lat": 0.27, "lon": 1.65 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "SP6MPL-34", "flight_id": "SP6MPL-34_2025-12-03", "payload_type": "WSPR", "seed_time": "2026-09-20 23:44:30", "seed_lat": 40.66666, "seed_lon": -119.83333, "seed_alt_m": 13625.0, "seed_age_h": 11.59, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 33.47644, "lon": -6.37984, "alt_m": 13747.4 }, "member_spread_deg": { "lat": 32.81, "lon": 169.58 }, "member_spread_now_deg": { "lat": 0.97, "lon": 2.04 }, "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": 150.67, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 72.57573, "lon": -16.08557, "alt_m": 11887.2 }, "member_spread_deg": { "lat": 28.99, "lon": 165.23 }, "member_spread_now_deg": { "lat": 20.32, "lon": 290.74 }, "display_as": "region", "display_reason": "member_spread" }, { "callsign": "VE3VRO-36", "flight_id": "VE3VRO-36_2026-07-30", "payload_type": "WSPR", "seed_time": "2026-09-20 22:16:00", "seed_lat": 52.3125, "seed_lon": -99.54167, "seed_alt_m": 12970.0, "seed_age_h": 13.07, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": 54.5049, "lon": 127.81433, "alt_m": 12704.7 }, "member_spread_deg": { "lat": 24.97, "lon": 124.57 }, "member_spread_now_deg": { "lat": 0.95, "lon": 10.55 }, "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": 301.74, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 65.06082, "lon": 46.1691, "alt_m": 12958.8 }, "member_spread_deg": { "lat": 45.36, "lon": 220.75 }, "member_spread_now_deg": { "lat": 43.06, "lon": 332.84 }, "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": 159.41, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 37.39717, "lon": -4.42334, "alt_m": 12378.8 }, "member_spread_deg": { "lat": 43.68, "lon": 244.01 }, "member_spread_now_deg": { "lat": 11.02, "lon": 76.88 }, "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": 44.85, "float_reliable": true, "dead_reckoned": true, "levels_spanned": 3, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 55.43554, "lon": 170.85351, "alt_m": 12244.0 }, "member_spread_deg": { "lat": 13.07, "lon": 336.37 }, "member_spread_now_deg": { "lat": 7.8, "lon": 43.27 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "WD4CFN-21", "flight_id": "WD4CFN-21_2026-09-13", "payload_type": "WSPR", "seed_time": "2026-09-20 16:23:54", "seed_lat": 26.43741, "seed_lon": -36.79154, "seed_alt_m": 13120.0, "seed_age_h": 18.94, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 2, "nominal_end": { "valid_time": "2026-09-28 05:30:00", "lat": 37.80218, "lon": 120.178, "alt_m": 12892.7 }, "member_spread_deg": { "lat": 24.9, "lon": 135.76 }, "member_spread_now_deg": { "lat": 1.58, "lon": 4.01 }, "display_as": "track", "display_reason": "fresh" }, { "callsign": "ZS6WBT-1", "flight_id": "ZS6WBT-1_2026-08-19", "payload_type": "WSPR", "seed_time": "2026-09-21 06:08:30", "seed_lat": -13.85417, "seed_lon": 154.625, "seed_alt_m": 15860.0, "seed_age_h": 5.19, "float_reliable": true, "dead_reckoned": false, "levels_spanned": 1, "nominal_end": { "valid_time": "2026-09-28 05:45:00", "lat": -17.85643, "lon": -164.2878, "alt_m": 15797.0 }, "member_spread_deg": { "lat": 14.26, "lon": 344.59 }, "member_spread_now_deg": { "lat": 0.91, "lon": 1.61 }, "display_as": "track", "display_reason": "fresh" } ] }