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: 10/11/2025
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 23:26:24 70.08,-175.40 77.37 10/11/2025 23:27:36 70.06,-175.42 77.36 1.40 72
2 10/12/2025 00:17:06 -69.98, -7.94 102.72 10/12/2025 00:17:06 -69.95, -7.94 102.75 3.06 0
3 10/12/2025 01:07:47 69.72, 159.76 77.04 10/12/2025 01:06:34 69.79, 159.48 77.11 13.97 73
4 10/14/2025 15:43:15 70.05, -59.57 78.34 10/14/2025 15:44:06 70.06, -59.54 78.36 1.86 51
5 10/14/2025 16:33:57 -69.96, 107.89 101.74 10/14/2025 16:33:36 -69.96, 107.94 101.74 1.96 21
6 10/14/2025 17:24:25 69.00, -83.42 77.32 10/14/2025 17:23:18 69.02, -85.67 77.34 89.81 67
7 10/17/2025 08:00:06 70.03, 56.25 79.31 10/17/2025 08:00:36 70.04, 56.30 79.31 1.98 30
8 10/17/2025 08:50:48 -69.94,-136.29 100.78 10/17/2025 08:50:06 -69.93,-136.22 100.78 2.95 42
9 10/19/2025 23:26:22 -70.60, 3.84 99.17 10/19/2025 23:27:32 -70.48, 5.17 99.29 51.10 70
10 10/20/2025 00:16:56 69.97, 172.14 80.22 10/20/2025 00:17:06 69.98, 172.10 80.23 1.81 10
11 10/20/2025 01:07:38 -69.87, -20.40 99.87 10/20/2025 01:06:36 -69.88, -20.41 99.87 0.67 62
12 10/22/2025 15:43:02 -70.07, 120.47 98.75 10/22/2025 15:44:07 -70.07, 120.47 98.75 0.16 65
13 10/22/2025 16:33:46 69.96, -72.06 81.16 10/22/2025 16:33:34 69.95, -72.05 81.15 1.49 12
14 10/22/2025 17:24:21 -69.50, 95.94 99.30 10/22/2025 17:23:09 -69.58, 95.06 99.22 35.33 72

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/11/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251011.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/11/2025 in txt file.

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