Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and METOP-B Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 8/8/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (METOP-B) | Time (METOP-B) | Lat,Lon (METOP-B) | SZA (METOP-B ) | Distance(km) | Time Diff (sec) |
| 1 | 08/14/2025 | 16:31:10 | -75.10, 98.43 | 118.56 | 08/14/2025 | 16:32:15 | -75.09, 101.89 | 118.82 | 98.83 | 65 |
| 2 | 08/14/2025 | 17:21:52 | 74.96, -93.83 | 61.28 | 08/14/2025 | 17:22:59 | 74.90, -91.31 | 61.04 | 73.24 | 67 |
| 3 | 08/14/2025 | 18:12:34 | -74.82, 73.86 | 118.87 | 08/14/2025 | 18:13:44 | -74.73, 75.57 | 119.09 | 51.05 | 70 |
| 4 | 08/14/2025 | 19:03:15 | 74.63,-118.29 | 60.92 | 08/14/2025 | 19:04:27 | 74.59,-117.48 | 60.81 | 24.23 | 72 |
| 5 | 08/14/2025 | 19:53:57 | -74.49, 49.39 | 119.23 | 08/14/2025 | 19:55:11 | -74.48, 49.55 | 119.27 | 5.27 | 74 |
| 6 | 08/14/2025 | 20:44:40 | 74.44,-143.16 | 60.73 | 08/14/2025 | 20:45:51 | 74.43,-143.24 | 60.70 | 2.68 | 71 |
| 7 | 08/14/2025 | 21:35:25 | -74.45, 24.13 | 119.26 | 08/14/2025 | 21:36:32 | -74.46, 24.17 | 119.27 | 1.98 | 67 |
| 8 | 08/14/2025 | 22:26:10 | 74.44,-168.55 | 60.75 | 08/14/2025 | 22:27:12 | 74.46,-168.50 | 60.75 | 2.54 | 62 |
| 9 | 08/14/2025 | 23:16:55 | -74.45, -1.26 | 119.23 | 08/14/2025 | 23:17:54 | -74.44, -1.21 | 119.26 | 1.79 | 59 |
| 10 | 08/15/2025 | 00:07:40 | 74.45, 166.07 | 60.78 | 08/15/2025 | 00:08:34 | 74.44, 166.12 | 60.76 | 1.69 | 54 |
| 11 | 08/15/2025 | 00:58:24 | -74.41, -26.52 | 119.26 | 08/15/2025 | 00:59:16 | -74.43, -26.59 | 119.25 | 3.04 | 52 |
| 12 | 08/15/2025 | 01:49:10 | 74.45, 140.68 | 60.81 | 08/15/2025 | 01:49:56 | 74.43, 140.74 | 60.77 | 3.16 | 46 |
| 13 | 08/15/2025 | 02:39:54 | -74.41, -51.91 | 119.23 | 08/15/2025 | 02:40:38 | -74.41, -51.97 | 119.24 | 1.85 | 44 |
| 14 | 08/15/2025 | 03:30:39 | 74.41, 115.42 | 60.78 | 08/15/2025 | 03:31:18 | 74.41, 115.36 | 60.78 | 1.86 | 39 |
| 15 | 08/15/2025 | 04:21:24 | -74.42, -77.30 | 119.20 | 08/15/2025 | 04:22:00 | -74.40, -77.35 | 119.23 | 2.86 | 36 |
| 16 | 08/15/2025 | 05:12:09 | 74.41, 90.03 | 60.81 | 08/15/2025 | 05:12:40 | 74.40, 89.98 | 60.79 | 2.40 | 31 |
| 17 | 08/15/2025 | 06:02:54 | -74.42,-102.68 | 119.17 | 08/15/2025 | 06:03:21 | -74.43,-102.61 | 119.18 | 2.41 | 27 |
| 18 | 08/15/2025 | 06:53:39 | 74.42, 64.64 | 60.83 | 08/15/2025 | 06:54:01 | 74.43, 64.72 | 60.83 | 2.71 | 22 |
| 19 | 08/15/2025 | 07:44:24 | -74.43,-128.07 | 119.15 | 08/15/2025 | 07:44:43 | -74.41,-127.99 | 119.17 | 2.85 | 19 |
| 20 | 08/15/2025 | 08:35:09 | 74.42, 39.26 | 60.86 | 08/15/2025 | 08:35:23 | 74.41, 39.34 | 60.84 | 2.69 | 14 |
| 21 | 08/15/2025 | 09:25:53 | -74.38,-153.33 | 119.18 | 08/15/2025 | 09:26:05 | -74.40,-153.37 | 119.16 | 2.01 | 12 |
| 22 | 08/15/2025 | 10:16:38 | 74.38, 14.00 | 60.83 | 08/15/2025 | 10:16:45 | 74.40, 13.96 | 60.85 | 2.41 | 7 |
| 23 | 08/15/2025 | 11:07:23 | -74.39,-178.72 | 119.15 | 08/15/2025 | 11:07:27 | -74.38,-178.75 | 119.15 | 1.15 | 4 |
| 24 | 08/15/2025 | 11:58:08 | 74.38, -11.39 | 60.86 | 08/15/2025 | 11:58:07 | 74.38, -11.42 | 60.86 | 0.93 | 1 |
| 25 | 08/15/2025 | 12:48:53 | -74.39, 155.89 | 119.12 | 08/15/2025 | 12:48:49 | -74.37, 155.87 | 119.14 | 3.04 | 4 |
| 26 | 08/15/2025 | 13:39:38 | 74.39, -36.78 | 60.89 | 08/15/2025 | 13:39:29 | 74.37, -36.80 | 60.87 | 2.61 | 9 |
| 27 | 08/15/2025 | 14:30:23 | -74.40, 130.51 | 119.09 | 08/15/2025 | 14:30:10 | -74.40, 130.61 | 119.09 | 3.16 | 13 |
| 28 | 08/15/2025 | 15:21:08 | 74.39, -62.17 | 60.92 | 08/15/2025 | 15:20:50 | 74.40, -62.06 | 60.92 | 3.26 | 18 |
| 29 | 08/15/2025 | 16:11:52 | -74.36, 105.24 | 119.12 | 08/15/2025 | 16:11:32 | -74.39, 105.23 | 119.08 | 3.35 | 20 |
| 30 | 08/15/2025 | 17:02:37 | 74.35, -87.43 | 60.89 | 08/15/2025 | 17:02:12 | 74.38, -87.44 | 60.93 | 3.77 | 25 |
| 31 | 08/15/2025 | 17:53:22 | -74.36, 79.86 | 119.09 | 08/15/2025 | 17:52:54 | -74.37, 79.85 | 119.08 | 1.06 | 28 |
| 32 | 08/15/2025 | 18:44:07 | 74.36,-112.82 | 60.92 | 08/15/2025 | 18:43:34 | 74.37,-112.82 | 60.94 | 1.44 | 33 |
| 33 | 08/15/2025 | 19:34:52 | -74.37, 54.47 | 119.07 | 08/15/2025 | 19:34:16 | -74.35, 54.47 | 119.07 | 1.27 | 36 |
| 34 | 08/15/2025 | 20:25:37 | 74.36,-138.20 | 60.94 | 08/15/2025 | 20:24:56 | 74.35,-138.21 | 60.95 | 0.91 | 41 |
| 35 | 08/15/2025 | 21:16:22 | -74.37, 29.08 | 119.04 | 08/15/2025 | 21:15:38 | -74.34, 29.09 | 119.06 | 3.57 | 44 |
| 36 | 08/15/2025 | 22:07:07 | 74.37,-163.59 | 60.97 | 08/15/2025 | 22:06:18 | 74.34,-163.59 | 60.96 | 3.24 | 49 |
| 37 | 08/15/2025 | 22:57:51 | -74.33, 3.82 | 119.07 | 08/15/2025 | 22:57:00 | -74.32, 3.71 | 119.05 | 3.46 | 51 |
| 38 | 08/15/2025 | 23:48:36 | 74.32, 171.15 | 60.94 | 08/15/2025 | 23:47:40 | 74.32, 171.03 | 60.97 | 3.45 | 56 |
| 39 | 08/16/2025 | 00:39:21 | -74.33, -21.57 | 119.04 | 08/16/2025 | 00:38:21 | -74.36, -21.55 | 119.00 | 2.74 | 60 |
| 40 | 08/16/2025 | 01:30:06 | 74.33, 145.76 | 60.97 | 08/16/2025 | 01:29:01 | 74.35, 145.78 | 61.01 | 3.05 | 65 |
| 41 | 08/16/2025 | 02:20:51 | -74.34, -46.95 | 119.01 | 08/16/2025 | 02:19:43 | -74.34, -46.93 | 118.99 | 0.78 | 68 |
| 42 | 08/16/2025 | 03:11:36 | 74.33, 120.37 | 61.00 | 08/16/2025 | 03:10:23 | 74.34, 120.39 | 61.02 | 0.95 | 73 |
| 43 | 08/16/2025 | 04:02:20 | -74.29, -72.22 | 119.04 | 08/16/2025 | 04:01:05 | -74.32, -72.31 | 118.98 | 4.54 | 75 |
| 44 | 08/16/2025 | 04:53:01 | 74.09, 95.61 | 60.75 | 08/16/2025 | 04:51:49 | 74.12, 94.52 | 60.87 | 33.20 | 72 |
| 45 | 08/16/2025 | 05:43:44 | -74.01, -96.87 | 119.34 | 08/16/2025 | 05:42:33 | -74.01, -98.42 | 119.21 | 47.62 | 71 |
| 46 | 08/16/2025 | 06:34:25 | 73.80, 70.94 | 60.44 | 08/16/2025 | 06:33:18 | 73.76, 68.31 | 60.61 | 81.81 | 67 |
| 47 | 08/16/2025 | 07:25:07 | -73.67,-121.42 | 119.70 | 08/16/2025 | 07:24:01 | -73.70,-124.50 | 119.43 | 96.20 | 66 |
Figure of NOAA-21 and METOP-B satellite orbits during SNOs since TLE Epoch: 8/8/2025
Download SNOs between NOAA-21 and METOP-B since TLE EPOCH: 08/08/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and METOP-B