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: 8/9/2025
| 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 | 16:31:09 | -75.09, 98.47 | 118.58 | 08/14/2025 | 16:32:15 | -75.05, 101.79 | 118.85 | 95.09 | 66 |
| 2 | 08/14/2025 | 17:21:51 | 74.94, -93.79 | 61.27 | 08/14/2025 | 17:22:59 | 74.86, -91.41 | 61.01 | 69.66 | 68 |
| 3 | 08/14/2025 | 18:12:33 | -74.81, 73.90 | 118.88 | 08/14/2025 | 18:13:43 | -74.75, 75.61 | 119.08 | 50.48 | 70 |
| 4 | 08/14/2025 | 19:03:14 | 74.61,-118.25 | 60.90 | 08/14/2025 | 19:04:26 | 74.60,-117.44 | 60.82 | 23.80 | 72 |
| 5 | 08/14/2025 | 19:53:57 | -74.53, 49.29 | 119.19 | 08/14/2025 | 19:55:10 | -74.49, 49.59 | 119.26 | 9.65 | 73 |
| 6 | 08/14/2025 | 20:44:40 | 74.42,-143.12 | 60.71 | 08/14/2025 | 20:45:51 | 74.44,-143.20 | 60.71 | 3.30 | 71 |
| 7 | 08/14/2025 | 21:35:25 | -74.43, 24.16 | 119.27 | 08/14/2025 | 21:36:33 | -74.42, 24.08 | 119.29 | 2.69 | 68 |
| 8 | 08/14/2025 | 22:26:10 | 74.43,-168.51 | 60.74 | 08/14/2025 | 22:27:13 | 74.42,-168.59 | 60.72 | 2.39 | 63 |
| 9 | 08/14/2025 | 23:16:55 | -74.44, -1.23 | 119.24 | 08/14/2025 | 23:17:54 | -74.46, -1.18 | 119.25 | 2.50 | 59 |
| 10 | 08/15/2025 | 00:07:40 | 74.43, 166.11 | 60.76 | 08/15/2025 | 00:08:34 | 74.46, 166.16 | 60.77 | 3.29 | 54 |
| 11 | 08/15/2025 | 00:58:25 | -74.44, -26.61 | 119.22 | 08/15/2025 | 00:59:16 | -74.44, -26.56 | 119.24 | 1.69 | 51 |
| 12 | 08/15/2025 | 01:49:10 | 74.44, 140.72 | 60.79 | 08/15/2025 | 01:49:56 | 74.44, 140.78 | 60.78 | 1.82 | 46 |
| 13 | 08/15/2025 | 02:39:55 | -74.45, -52.00 | 119.19 | 08/15/2025 | 02:40:38 | -74.43, -51.94 | 119.23 | 3.18 | 43 |
| 14 | 08/15/2025 | 03:30:40 | 74.44, 115.33 | 60.82 | 08/15/2025 | 03:31:18 | 74.43, 115.39 | 60.79 | 2.61 | 38 |
| 15 | 08/15/2025 | 04:21:24 | -74.41, -77.26 | 119.22 | 08/15/2025 | 04:22:00 | -74.41, -77.32 | 119.22 | 1.83 | 36 |
| 16 | 08/15/2025 | 05:12:09 | 74.40, 90.07 | 60.79 | 08/15/2025 | 05:12:40 | 74.41, 90.01 | 60.80 | 2.15 | 31 |
| 17 | 08/15/2025 | 06:02:54 | -74.41,-102.65 | 119.19 | 08/15/2025 | 06:03:22 | -74.39,-102.70 | 119.21 | 2.39 | 28 |
| 18 | 08/15/2025 | 06:53:39 | 74.40, 64.68 | 60.82 | 08/15/2025 | 06:54:02 | 74.39, 64.63 | 60.81 | 1.84 | 23 |
| 19 | 08/15/2025 | 07:44:24 | -74.42,-128.04 | 119.16 | 08/15/2025 | 07:44:43 | -74.43,-127.96 | 119.16 | 2.70 | 19 |
| 20 | 08/15/2025 | 08:35:09 | 74.41, 39.29 | 60.85 | 08/15/2025 | 08:35:23 | 74.43, 39.37 | 60.85 | 3.19 | 14 |
| 21 | 08/15/2025 | 09:25:54 | -74.42,-153.42 | 119.13 | 08/15/2025 | 09:26:05 | -74.41,-153.34 | 119.15 | 2.72 | 11 |
| 22 | 08/15/2025 | 10:16:39 | 74.41, 13.91 | 60.87 | 08/15/2025 | 10:16:45 | 74.41, 13.99 | 60.86 | 2.59 | 6 |
| 23 | 08/15/2025 | 11:07:23 | -74.38,-178.69 | 119.16 | 08/15/2025 | 11:07:27 | -74.40,-178.72 | 119.14 | 2.36 | 4 |
| 24 | 08/15/2025 | 11:58:08 | 74.37, -11.36 | 60.85 | 08/15/2025 | 11:58:07 | 74.40, -11.39 | 60.87 | 3.03 | 1 |
| 25 | 08/15/2025 | 12:48:53 | -74.38, 155.93 | 119.13 | 08/15/2025 | 12:48:49 | -74.38, 155.90 | 119.13 | 0.88 | 4 |
| 26 | 08/15/2025 | 13:39:38 | 74.37, -36.74 | 60.87 | 08/15/2025 | 13:39:29 | 74.38, -36.77 | 60.88 | 0.99 | 9 |
| 27 | 08/15/2025 | 14:30:23 | -74.39, 130.54 | 119.11 | 08/15/2025 | 14:30:11 | -74.36, 130.52 | 119.12 | 2.60 | 12 |
| 28 | 08/15/2025 | 15:21:08 | 74.38, -62.13 | 60.90 | 08/15/2025 | 15:20:51 | 74.36, -62.15 | 60.89 | 1.96 | 17 |
| 29 | 08/15/2025 | 16:11:53 | -74.39, 105.15 | 119.08 | 08/15/2025 | 16:11:32 | -74.40, 105.26 | 119.08 | 3.30 | 21 |
| 30 | 08/15/2025 | 17:02:38 | 74.39, -87.52 | 60.93 | 08/15/2025 | 17:02:12 | 74.40, -87.41 | 60.94 | 3.51 | 26 |
| 31 | 08/15/2025 | 17:53:22 | -74.35, 79.89 | 119.11 | 08/15/2025 | 17:52:54 | -74.38, 79.88 | 119.07 | 3.73 | 28 |
| 32 | 08/15/2025 | 18:44:08 | 74.39,-112.91 | 60.96 | 08/15/2025 | 18:43:34 | 74.38,-112.79 | 60.95 | 3.60 | 34 |
| 33 | 08/15/2025 | 19:34:52 | -74.35, 54.50 | 119.08 | 08/15/2025 | 19:34:16 | -74.37, 54.50 | 119.06 | 1.41 | 36 |
| 34 | 08/15/2025 | 20:25:37 | 74.35,-138.17 | 60.93 | 08/15/2025 | 20:24:56 | 74.36,-138.17 | 60.96 | 2.03 | 41 |
| 35 | 08/15/2025 | 21:16:22 | -74.36, 29.11 | 119.05 | 08/15/2025 | 21:15:38 | -74.35, 29.12 | 119.05 | 0.92 | 44 |
| 36 | 08/15/2025 | 22:07:07 | 74.35,-163.56 | 60.96 | 08/15/2025 | 22:06:18 | 74.35,-163.55 | 60.97 | 0.32 | 49 |
| 37 | 08/15/2025 | 22:57:52 | -74.36, 3.73 | 119.02 | 08/15/2025 | 22:57:00 | -74.33, 3.74 | 119.04 | 3.25 | 52 |
| 38 | 08/15/2025 | 23:48:37 | 74.36, 171.06 | 60.98 | 08/15/2025 | 23:47:40 | 74.33, 171.06 | 60.98 | 2.68 | 57 |
| 39 | 08/16/2025 | 00:39:21 | -74.32, -21.53 | 119.05 | 08/16/2025 | 00:38:22 | -74.32, -21.65 | 119.03 | 3.34 | 59 |
| 40 | 08/16/2025 | 01:30:06 | 74.31, 145.80 | 60.96 | 08/16/2025 | 01:29:02 | 74.32, 145.68 | 60.98 | 3.41 | 64 |
| 41 | 08/16/2025 | 02:20:51 | -74.33, -46.92 | 119.02 | 08/16/2025 | 02:19:43 | -74.35, -46.90 | 118.98 | 3.04 | 68 |
| 42 | 08/16/2025 | 03:11:36 | 74.32, 120.41 | 60.98 | 08/16/2025 | 03:10:23 | 74.35, 120.43 | 61.03 | 3.58 | 73 |
| 43 | 08/16/2025 | 04:02:20 | -74.28, -72.18 | 119.05 | 08/16/2025 | 04:01:06 | -74.29, -72.41 | 119.01 | 6.75 | 74 |
| 44 | 08/16/2025 | 04:53:00 | 74.08, 95.64 | 60.73 | 08/16/2025 | 04:51:49 | 74.09, 94.43 | 60.84 | 36.88 | 71 |
| 45 | 08/16/2025 | 05:43:43 | -73.99, -96.84 | 119.36 | 08/16/2025 | 05:42:33 | -73.97, -98.51 | 119.24 | 51.48 | 70 |
| 46 | 08/16/2025 | 06:34:24 | 73.79, 70.98 | 60.43 | 08/16/2025 | 06:33:17 | 73.77, 68.34 | 60.62 | 81.83 | 67 |
| 47 | 08/16/2025 | 07:25:06 | -73.65,-121.39 | 119.72 | 08/16/2025 | 07:24:01 | -73.66,-124.59 | 119.47 | 99.97 | 65 |
Figure of NOAA-21 and METOP-B satellite orbits during SNOs since TLE Epoch: 8/9/2025
Download SNOs between NOAA-21 and METOP-B since TLE EPOCH: 08/09/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and METOP-B