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: 10/10/2025
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 10/11/2025 23:26:25 70.09,-175.43 77.39 10/11/2025 23:27:36 70.10,-175.36 77.40 2.87 71
2 10/12/2025 00:17:06 -69.94, -7.88 102.76 10/12/2025 00:17:07 -69.94, -7.96 102.76 2.95 1
3 10/12/2025 01:07:48 69.73, 159.74 77.05 10/12/2025 01:06:35 69.78, 159.46 77.10 12.08 73
4 10/14/2025 15:43:15 70.07, -59.60 78.36 10/14/2025 15:44:06 70.05, -59.56 78.34 2.48 51
5 10/14/2025 16:33:56 -69.92, 107.95 101.78 10/14/2025 16:33:36 -69.94, 107.92 101.76 2.86 20
6 10/14/2025 17:24:24 68.96, -83.37 77.28 10/14/2025 17:23:18 69.00, -85.69 77.32 92.81 66
7 10/17/2025 08:00:05 70.00, 56.30 79.28 10/17/2025 08:00:36 70.02, 56.28 79.30 2.51 31
8 10/17/2025 08:50:47 -69.90,-136.24 100.81 10/17/2025 08:50:06 -69.92,-136.24 100.80 1.66 41
9 10/19/2025 23:26:22 -70.62, 3.81 99.15 10/19/2025 23:27:31 -70.51, 5.23 99.25 53.77 69
10 10/20/2025 00:16:56 69.99, 172.11 80.24 10/20/2025 00:17:06 69.96, 172.08 80.21 3.22 10
11 10/20/2025 01:07:38 -69.89, -20.43 99.85 10/20/2025 01:06:36 -69.86, -20.43 99.89 3.41 62
12 10/22/2025 15:43:02 -70.04, 120.52 98.78 10/22/2025 15:44:08 -70.05, 120.44 98.77 3.06 66
13 10/22/2025 16:33:46 69.94, -72.02 81.14 10/22/2025 16:33:35 69.93, -72.08 81.13 2.26 11
14 10/22/2025 17:24:22 -69.52, 95.91 99.27 10/22/2025 17:23:10 -69.56, 95.04 99.24 34.04 72

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/10/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251010.jpg

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

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