Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and FY3D Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/9/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (FY3D) | Time (FY3D) | Lat,Lon (FY3D) | SZA (FY3D ) | Distance(km) | Time Diff (sec) |
| 1 | 10/21/2025 | 07:40:16 | 81.00, 11.45 | 94.90 | 10/21/2025 | 07:41:21 | 80.96, 15.50 | 94.37 | 70.77 | 65 |
| 2 | 10/21/2025 | 09:21:43 | 80.96, -12.90 | 94.77 | 10/21/2025 | 09:22:54 | 80.92, -11.21 | 94.52 | 29.83 | 71 |
| 3 | 10/21/2025 | 11:03:10 | 80.91, -37.26 | 94.65 | 10/21/2025 | 11:04:25 | 80.91, -37.17 | 94.60 | 1.61 | 75 |
| 4 | 10/21/2025 | 11:54:02 | -81.03, 127.30 | 84.94 | 10/21/2025 | 11:55:05 | -80.96, 132.25 | 85.59 | 86.35 | 63 |
| 5 | 10/21/2025 | 12:44:40 | 80.91, -62.71 | 94.68 | 10/21/2025 | 12:45:55 | 80.90, -62.76 | 94.65 | 1.63 | 75 |
| 6 | 10/21/2025 | 13:35:28 | -80.97, 103.32 | 85.12 | 10/21/2025 | 13:36:38 | -80.93, 105.54 | 85.44 | 39.17 | 70 |
| 7 | 10/21/2025 | 14:26:08 | 80.90, -87.80 | 94.67 | 10/21/2025 | 14:27:23 | 80.90, -87.98 | 94.66 | 3.28 | 75 |
| 8 | 10/21/2025 | 15:16:53 | -80.91, 79.31 | 85.30 | 10/21/2025 | 15:18:09 | -80.90, 79.21 | 85.33 | 1.98 | 76 |
| 9 | 10/21/2025 | 16:07:38 | 80.90,-113.25 | 94.70 | 10/21/2025 | 16:08:52 | 80.91,-113.20 | 94.67 | 1.10 | 74 |
| 10 | 10/21/2025 | 16:58:23 | -80.91, 53.87 | 85.26 | 10/21/2025 | 16:59:38 | -80.91, 53.99 | 85.32 | 2.29 | 75 |
| 11 | 10/21/2025 | 17:49:08 | 80.91,-138.70 | 94.74 | 10/21/2025 | 17:50:22 | 80.90,-138.79 | 94.71 | 1.73 | 74 |
| 12 | 10/21/2025 | 18:39:52 | -80.90, 28.78 | 85.28 | 10/21/2025 | 18:41:07 | -80.91, 28.77 | 85.31 | 1.33 | 75 |
| 13 | 10/21/2025 | 19:30:38 | 80.91,-164.15 | 94.77 | 10/21/2025 | 19:31:51 | 80.91,-164.01 | 94.72 | 2.34 | 73 |
| 14 | 10/21/2025 | 20:21:22 | -80.90, 3.33 | 85.24 | 10/21/2025 | 20:22:37 | -80.90, 3.18 | 85.26 | 2.63 | 75 |
| 15 | 10/21/2025 | 21:12:08 | 80.91, 170.40 | 94.81 | 10/21/2025 | 21:13:21 | 80.90, 170.39 | 94.77 | 1.42 | 73 |
| 16 | 10/21/2025 | 22:02:52 | -80.90, -22.12 | 85.21 | 10/21/2025 | 22:04:06 | -80.91, -22.04 | 85.25 | 1.41 | 74 |
| 17 | 10/21/2025 | 22:53:37 | 80.90, 145.32 | 94.79 | 10/21/2025 | 22:54:50 | 80.90, 145.17 | 94.78 | 2.57 | 73 |
| 18 | 10/21/2025 | 23:44:22 | -80.91, -47.57 | 85.17 | 10/21/2025 | 23:45:36 | -80.90, -47.63 | 85.21 | 1.38 | 74 |
| 19 | 10/22/2025 | 00:35:07 | 80.90, 119.87 | 94.83 | 10/22/2025 | 00:36:19 | 80.91, 119.95 | 94.79 | 1.68 | 72 |
| 20 | 10/22/2025 | 01:25:52 | -80.91, -73.01 | 85.14 | 10/22/2025 | 01:27:05 | -80.91, -72.85 | 85.20 | 2.96 | 73 |
| 21 | 10/22/2025 | 02:16:37 | 80.91, 94.42 | 94.86 | 10/22/2025 | 02:17:49 | 80.90, 94.36 | 94.83 | 1.06 | 72 |
| 22 | 10/22/2025 | 03:07:21 | -80.90, -98.10 | 85.16 | 10/22/2025 | 03:08:34 | -80.91, -98.07 | 85.19 | 1.42 | 73 |
| 23 | 10/22/2025 | 03:58:07 | 80.91, 68.97 | 94.90 | 10/22/2025 | 03:59:18 | 80.91, 69.14 | 94.84 | 3.06 | 71 |
| 24 | 10/22/2025 | 04:48:51 | -80.90,-123.55 | 85.12 | 10/22/2025 | 04:50:04 | -80.90,-123.66 | 85.14 | 1.93 | 73 |
| 25 | 10/22/2025 | 05:39:37 | 80.91, 43.52 | 94.93 | 10/22/2025 | 05:40:48 | 80.90, 43.55 | 94.89 | 1.56 | 71 |
| 26 | 10/22/2025 | 06:30:21 | -80.91,-149.00 | 85.09 | 10/22/2025 | 06:31:33 | -80.91,-148.88 | 85.13 | 2.08 | 72 |
| 27 | 10/22/2025 | 07:21:06 | 80.90, 18.43 | 94.92 | 10/22/2025 | 07:22:17 | 80.90, 18.33 | 94.90 | 1.86 | 71 |
| 28 | 10/22/2025 | 08:11:51 | -80.91,-174.45 | 85.05 | 10/22/2025 | 08:13:03 | -80.90,-174.47 | 85.09 | 0.94 | 72 |
| 29 | 10/22/2025 | 09:02:36 | 80.90, -7.02 | 94.95 | 10/22/2025 | 09:03:46 | 80.91, -6.89 | 94.91 | 2.34 | 70 |
| 30 | 10/22/2025 | 09:53:20 | -80.90, 160.46 | 85.07 | 10/22/2025 | 09:54:32 | -80.91, 160.31 | 85.08 | 2.98 | 72 |
| 31 | 10/22/2025 | 10:44:06 | 80.91, -32.47 | 94.99 | 10/22/2025 | 10:45:16 | 80.90, -32.48 | 94.95 | 0.54 | 70 |
| 32 | 10/22/2025 | 11:34:50 | -80.90, 135.02 | 85.03 | 10/22/2025 | 11:36:01 | -80.91, 135.09 | 85.07 | 1.79 | 71 |
| 33 | 10/22/2025 | 12:25:35 | 80.89, -57.56 | 94.97 | 10/22/2025 | 12:26:45 | 80.91, -57.70 | 94.96 | 3.00 | 70 |
| 34 | 10/22/2025 | 13:16:20 | -80.90, 109.57 | 85.00 | 10/22/2025 | 13:17:31 | -80.90, 109.50 | 85.02 | 1.25 | 71 |
| 35 | 10/22/2025 | 14:07:06 | 80.91, -83.37 | 95.06 | 10/22/2025 | 14:08:15 | 80.90, -83.29 | 95.01 | 1.98 | 69 |
| 36 | 10/22/2025 | 14:57:50 | -80.91, 84.12 | 84.96 | 10/22/2025 | 14:59:00 | -80.91, 84.28 | 85.01 | 2.76 | 70 |
| 37 | 10/22/2025 | 15:48:35 | 80.90,-108.45 | 95.04 | 10/22/2025 | 15:49:44 | 80.91,-108.51 | 95.02 | 1.17 | 69 |
| 38 | 10/22/2025 | 16:39:20 | -80.91, 58.67 | 84.93 | 10/22/2025 | 16:40:30 | -80.90, 58.69 | 84.97 | 0.91 | 70 |
| 39 | 10/22/2025 | 17:30:05 | 80.90,-133.90 | 95.07 | 10/22/2025 | 17:31:13 | 80.91,-133.74 | 95.03 | 3.02 | 68 |
| 40 | 10/22/2025 | 18:20:49 | -80.90, 33.58 | 84.94 | 10/22/2025 | 18:21:59 | -80.91, 33.47 | 84.96 | 2.35 | 70 |
| 41 | 10/22/2025 | 19:11:35 | 80.91,-159.35 | 95.11 | 10/22/2025 | 19:12:43 | 80.90,-159.33 | 95.07 | 0.72 | 68 |
| 42 | 10/22/2025 | 20:02:19 | -80.90, 8.13 | 84.91 | 10/22/2025 | 20:03:28 | -80.91, 8.24 | 84.95 | 2.30 | 69 |
| 43 | 10/22/2025 | 20:53:04 | 80.89, 175.56 | 95.09 | 10/22/2025 | 20:54:12 | 80.91, 175.45 | 95.08 | 2.37 | 68 |
| 44 | 10/22/2025 | 21:43:49 | -80.90, -17.31 | 84.87 | 10/22/2025 | 21:44:58 | -80.90, -17.35 | 84.90 | 0.56 | 69 |
| 45 | 10/22/2025 | 22:34:35 | 80.92, 149.75 | 95.18 | 10/22/2025 | 22:35:42 | 80.90, 149.86 | 95.13 | 2.55 | 67 |
| 46 | 10/22/2025 | 23:25:19 | -80.91, -42.76 | 84.84 | 10/22/2025 | 23:26:28 | -80.90, -42.94 | 84.86 | 3.21 | 69 |
| 47 | 10/23/2025 | 00:16:04 | 80.90, 124.66 | 95.16 | 10/23/2025 | 00:17:11 | 80.91, 124.64 | 95.14 | 0.55 | 67 |
| 48 | 10/23/2025 | 01:06:49 | -80.91, -68.21 | 84.80 | 10/23/2025 | 01:07:57 | -80.90, -68.16 | 84.85 | 1.32 | 68 |
| 49 | 10/23/2025 | 01:57:34 | 80.91, 99.21 | 95.20 | 10/23/2025 | 01:58:41 | 80.90, 99.05 | 95.18 | 2.91 | 67 |
| 50 | 10/23/2025 | 02:48:18 | -80.90, -93.30 | 84.82 | 10/23/2025 | 02:49:26 | -80.91, -93.38 | 84.84 | 1.76 | 68 |
Figure of NOAA-21 and FY3D satellite orbits during SNOs since TLE Epoch: 10/9/2025
Download SNOs between NOAA-21 and FY3D since TLE EPOCH: 10/09/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and FY3D