Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-20 and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/22/2025
Index Date (NOAA-20) Time (NOAA-20) Lat,Lon (NOAA-20) SZA (NOAA-20 ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 10/22/2025 15:43:30 -69.99, 120.46 98.82 10/22/2025 15:44:07 -70.01, 120.38 98.81 3.34 37
2 10/22/2025 16:34:15 69.92, -72.12 81.11 10/22/2025 16:33:34 69.90, -72.12 81.10 1.49 41
3 10/25/2025 07:09:52 70.17, 68.62 82.28 10/25/2025 07:11:04 70.13, 68.81 82.24 8.75 72
4 10/25/2025 08:00:32 -69.98,-123.77 97.91 10/25/2025 08:00:35 -69.97,-123.79 97.92 1.83 3
5 10/25/2025 08:51:15 69.80, 43.81 81.93 10/25/2025 08:50:03 69.80, 43.63 81.93 6.95 72
6 10/27/2025 23:26:52 70.06,-175.47 83.08 10/27/2025 23:27:32 70.05,-175.41 83.06 2.73 40
7 10/28/2025 00:17:33 -69.93, -7.94 97.05 10/28/2025 00:17:02 -69.94, -7.93 97.04 1.69 31
8 10/30/2025 14:53:15 -70.51, 132.27 95.60 10/30/2025 14:54:25 -70.42, 133.38 95.69 42.42 70
9 10/30/2025 15:43:51 69.96, -59.57 83.86 10/30/2025 15:43:58 69.98, -59.61 83.88 2.57 7
10 10/30/2025 16:34:33 -69.88, 107.88 96.22 10/30/2025 16:33:28 -69.88, 107.87 96.22 0.36 65
11 11/02/2025 07:10:08 -70.05,-111.26 95.21 11/02/2025 07:10:57 -70.05,-111.27 95.21 0.65 49
12 11/02/2025 08:00:52 69.93, 56.24 84.68 11/02/2025 08:00:24 69.93, 56.21 84.68 1.08 28
13 11/04/2025 22:36:36 70.59,-163.67 86.15 11/04/2025 22:37:46 70.45,-162.42 86.01 48.76 70
14 11/04/2025 23:27:09 -70.03, 4.53 94.41 11/04/2025 23:27:22 -70.02, 4.59 94.42 2.36 13
15 11/05/2025 00:17:53 69.90, 172.03 85.48 11/05/2025 00:16:49 69.90, 172.07 85.48 1.32 64

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/22/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251022.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/22/2025 in txt file.

Historial Predications of SNOs between NOAA-20 and LANDSAT-9