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: 8/5/2025
| 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 | 08/06/2025 | 03:00:30 | 78.53, 107.30 | 63.38 | 08/06/2025 | 03:00:26 | 78.75, 108.20 | 63.22 | 31.32 | 4 |
| 2 | 08/06/2025 | 15:46:23 | -77.61, 8.69 | 100.72 | 08/06/2025 | 15:46:17 | -77.53, 9.13 | 100.61 | 13.94 | 6 |
| 3 | 08/06/2025 | 20:49:41 | -80.15, -49.59 | 104.72 | 08/06/2025 | 20:49:46 | -80.85, -51.88 | 104.45 | 88.52 | 5 |
| 4 | 08/06/2025 | 21:43:18 | 72.83, 85.05 | 85.13 | 08/06/2025 | 21:43:19 | 73.11, 83.49 | 85.56 | 59.69 | 1 |
| 5 | 08/06/2025 | 22:28:02 | -79.23, -9.12 | 115.34 | 08/06/2025 | 22:27:56 | -79.84, -7.96 | 115.16 | 72.58 | 6 |
| 6 | 08/07/2025 | 18:49:00 | -80.40, -16.39 | 105.02 | 08/07/2025 | 18:49:01 | -80.16, -15.83 | 105.05 | 29.31 | 1 |
| 7 | 08/07/2025 | 21:20:43 | 81.02, 136.27 | 73.27 | 08/07/2025 | 21:20:44 | 81.15, 136.24 | 73.26 | 13.43 | 1 |
| 8 | 08/07/2025 | 22:14:16 | -75.16, -97.13 | 97.29 | 08/07/2025 | 22:14:17 | -75.10, -96.81 | 97.09 | 11.04 | 1 |
| 9 | 08/08/2025 | 21:51:45 | -81.32, -35.71 | 108.79 | 08/08/2025 | 21:51:41 | -80.95, -35.65 | 108.99 | 41.08 | 4 |
| 10 | 08/08/2025 | 22:36:14 | 66.19,-158.05 | 50.21 | 08/08/2025 | 22:36:17 | 66.13,-158.49 | 49.60 | 21.19 | 3 |
| 11 | 08/08/2025 | 22:45:08 | 77.37, 82.94 | 80.22 | 08/08/2025 | 22:45:13 | 77.10, 84.94 | 80.11 | 57.42 | 5 |
| 12 | 08/09/2025 | 00:23:25 | 81.06, 119.41 | 69.31 | 08/09/2025 | 00:23:23 | 80.94, 119.21 | 69.15 | 13.87 | 2 |
| 13 | 08/09/2025 | 07:05:20 | 71.35, 68.02 | 55.66 | 08/09/2025 | 07:05:17 | 71.26, 67.62 | 55.14 | 17.53 | 3 |
| 14 | 08/09/2025 | 15:40:51 | 75.39,-178.09 | 82.91 | 08/09/2025 | 15:40:55 | 75.47,-178.51 | 83.16 | 14.79 | 4 |
| 15 | 08/09/2025 | 22:22:44 | 80.90, 153.10 | 69.02 | 08/09/2025 | 22:22:39 | 80.26, 151.87 | 68.69 | 74.99 | 5 |
| 16 | 08/09/2025 | 23:07:21 | -64.24, 15.98 | 131.44 | 08/09/2025 | 23:07:15 | -64.61, 17.68 | 131.61 | 91.50 | 6 |
| 17 | 08/09/2025 | 23:16:06 | -79.20, -94.58 | 102.16 | 08/09/2025 | 23:16:11 | -78.65, -92.28 | 102.32 | 78.51 | 5 |
| 18 | 08/10/2025 | 03:26:11 | 79.22, 96.42 | 65.55 | 08/10/2025 | 03:26:05 | 79.77, 95.57 | 65.88 | 64.05 | 6 |
| 19 | 08/10/2025 | 22:53:42 | -79.80, -20.24 | 113.22 | 08/10/2025 | 22:53:36 | -79.26, -23.54 | 113.41 | 89.40 | 6 |
| 20 | 08/10/2025 | 23:47:06 | 80.44, 89.55 | 75.80 | 08/10/2025 | 23:47:08 | 79.78, 91.29 | 75.60 | 80.67 | 2 |
| 21 | 08/11/2025 | 06:28:45 | 75.76, 67.09 | 61.19 | 08/11/2025 | 06:28:50 | 75.77, 67.98 | 60.79 | 24.50 | 5 |
| 22 | 08/11/2025 | 15:04:23 | 70.58,-179.17 | 88.90 | 08/11/2025 | 15:04:28 | 70.93,-178.54 | 88.83 | 45.55 | 5 |
| 23 | 08/11/2025 | 19:14:47 | -79.71, -30.17 | 102.51 | 08/11/2025 | 19:14:41 | -79.64, -31.14 | 102.24 | 20.71 | 6 |
| 24 | 08/11/2025 | 21:46:18 | 80.81, 125.35 | 75.12 | 08/11/2025 | 21:46:23 | 81.00, 127.18 | 74.82 | 38.75 | 5 |
| 25 | 08/11/2025 | 23:24:32 | 77.87, 164.86 | 64.09 | 08/11/2025 | 23:24:33 | 77.35, 162.53 | 63.59 | 80.53 | 1 |
| 26 | 08/11/2025 | 23:33:36 | 64.99, 46.97 | 94.87 | 08/11/2025 | 23:33:30 | 65.15, 46.06 | 95.44 | 45.81 | 6 |
| 27 | 08/12/2025 | 00:18:00 | -81.26, -80.14 | 106.76 | 08/12/2025 | 00:18:05 | -80.87, -77.90 | 107.24 | 57.61 | 5 |
| 28 | 08/12/2025 | 15:35:35 | -72.26, -4.13 | 92.66 | 08/12/2025 | 15:35:29 | -71.84, -5.40 | 91.76 | 63.77 | 6 |
| 29 | 08/12/2025 | 22:17:27 | -81.26, -49.73 | 106.54 | 08/12/2025 | 22:17:21 | -80.66, -49.72 | 106.69 | 67.16 | 6 |
| 30 | 08/12/2025 | 23:55:35 | -76.15, -15.91 | 117.82 | 08/12/2025 | 23:55:30 | -75.91, -17.20 | 118.26 | 43.68 | 5 |
| 31 | 08/13/2025 | 00:04:29 | -67.82,-137.87 | 87.78 | 08/13/2025 | 00:04:27 | -67.57,-136.68 | 87.50 | 57.00 | 2 |
| 32 | 08/13/2025 | 00:48:57 | 81.18, 109.40 | 71.02 | 08/13/2025 | 00:49:02 | 81.15, 110.10 | 70.79 | 12.43 | 5 |
| 33 | 08/13/2025 | 03:20:39 | -80.62, -96.56 | 110.84 | 08/13/2025 | 03:20:44 | -80.31, -93.70 | 111.57 | 63.13 | 5 |
| 34 | 08/14/2025 | 00:26:32 | 73.93, 162.61 | 59.89 | 08/14/2025 | 00:26:28 | 74.00, 162.99 | 59.55 | 14.20 | 4 |
| 35 | 08/14/2025 | 01:20:07 | -80.61, -66.20 | 110.60 | 08/14/2025 | 01:20:01 | -81.05, -66.03 | 110.48 | 49.38 | 6 |
| 36 | 08/14/2025 | 03:51:50 | 79.77, 85.52 | 67.68 | 08/14/2025 | 03:51:44 | 80.56, 84.61 | 68.20 | 89.28 | 6 |
| 37 | 08/14/2025 | 06:23:23 | -78.27,-121.95 | 114.66 | 08/14/2025 | 06:23:28 | -77.78,-119.37 | 115.63 | 80.87 | 5 |
| 38 | 08/14/2025 | 19:09:14 | 77.90, 139.37 | 81.18 | 08/14/2025 | 19:09:19 | 78.52, 141.81 | 80.57 | 88.20 | 5 |
| 39 | 08/15/2025 | 00:12:47 | 79.93, 77.36 | 78.04 | 08/15/2025 | 00:12:48 | 80.29, 76.25 | 78.20 | 44.83 | 1 |
| 40 | 08/15/2025 | 00:57:25 | -71.44, -20.15 | 122.53 | 08/15/2025 | 00:57:24 | -71.85, -17.75 | 122.65 | 95.57 | 1 |
| 41 | 08/15/2025 | 06:54:34 | 76.97, 56.33 | 63.90 | 08/15/2025 | 06:54:28 | 77.67, 54.76 | 64.40 | 86.38 | 6 |
| 42 | 08/15/2025 | 19:40:26 | -79.15, -41.01 | 100.38 | 08/15/2025 | 19:40:20 | -78.61, -44.04 | 99.52 | 88.97 | 6 |
| 43 | 08/15/2025 | 22:11:58 | 80.41, 112.97 | 77.31 | 08/15/2025 | 22:12:03 | 80.73, 113.36 | 77.23 | 36.45 | 5 |
| 44 | 08/16/2025 | 00:43:48 | -80.95, -96.18 | 104.12 | 08/16/2025 | 00:43:46 | -80.96, -96.24 | 104.11 | 1.29 | 2 |
| 45 | 08/16/2025 | 22:43:07 | -81.08, -62.86 | 104.33 | 08/16/2025 | 22:43:01 | -80.26, -64.39 | 104.14 | 95.50 | 6 |
| 46 | 08/17/2025 | 01:14:47 | 81.32, 92.18 | 73.80 | 08/17/2025 | 01:14:43 | 81.14, 92.05 | 73.70 | 19.57 | 4 |
| 47 | 08/17/2025 | 01:23:41 | 57.42, 14.16 | 103.96 | 08/17/2025 | 01:23:39 | 57.38, 14.28 | 104.52 | 8.66 | 2 |
| 48 | 08/17/2025 | 03:46:19 | -80.97,-109.16 | 108.62 | 08/17/2025 | 03:46:24 | -80.70,-108.17 | 109.04 | 34.02 | 5 |
| 49 | 08/18/2025 | 01:45:38 | -80.79, -75.58 | 108.87 | 08/18/2025 | 01:45:40 | -80.64, -75.95 | 109.07 | 18.62 | 2 |
| 50 | 08/18/2025 | 04:17:29 | 80.26, 74.10 | 69.86 | 08/18/2025 | 04:17:23 | 81.02, 74.84 | 70.16 | 86.42 | 6 |
| 51 | 08/18/2025 | 06:49:05 | -79.02,-132.93 | 112.31 | 08/18/2025 | 06:49:07 | -78.94,-133.28 | 112.57 | 11.66 | 2 |
| 52 | 08/18/2025 | 19:34:59 | 76.97, 128.81 | 83.63 | 08/18/2025 | 19:34:58 | 76.75, 129.71 | 83.73 | 33.47 | 1 |
| 53 | 08/19/2025 | 02:07:40 | 51.87, 158.12 | 39.67 | 08/19/2025 | 02:07:41 | 51.91, 158.26 | 39.02 | 10.30 | 1 |
| 54 | 08/19/2025 | 02:16:36 | 79.65, 110.36 | 69.00 | 08/19/2025 | 02:16:37 | 79.70, 110.67 | 68.79 | 8.42 | 1 |
| 55 | 08/19/2025 | 11:30:21 | -66.90,-172.31 | 125.82 | 08/19/2025 | 11:30:25 | -66.92,-170.85 | 126.33 | 63.59 | 4 |
Figure of NOAA-21 and FY3D satellite orbits during SNOs since TLE Epoch: 8/5/2025
Download SNOs between NOAA-21 and FY3D since TLE EPOCH: 08/05/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and FY3D