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: 8/9/2025
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 08/11/2025 14:53:14 -70.05, 132.83 125.04 08/11/2025 14:54:21 -70.05, 132.83 125.05 0.25 67
2 08/11/2025 15:43:58 69.92, -59.67 54.85 08/11/2025 15:43:48 69.95, -59.67 54.87 2.62 10
3 08/11/2025 16:34:34 -69.53, 108.23 125.56 08/11/2025 16:33:22 -69.62, 107.50 125.44 30.05 72
4 08/14/2025 07:10:08 -70.00,-111.32 124.27 08/14/2025 07:10:53 -69.98,-111.39 124.30 3.68 45
5 08/14/2025 08:00:52 69.88, 56.17 55.61 08/14/2025 08:00:20 69.87, 56.10 55.61 2.67 32
6 08/16/2025 22:36:35 70.84,-164.19 57.44 08/16/2025 22:37:42 70.71,-162.08 57.23 78.59 67
7 08/16/2025 23:27:03 -70.01, 4.44 123.43 08/16/2025 23:27:23 -70.00, 4.52 123.44 3.02 20
8 08/17/2025 00:17:45 69.84, 172.00 56.41 08/17/2025 00:16:50 69.84, 171.93 56.42 2.74 55
9 08/19/2025 14:53:14 70.07, -47.18 57.49 08/19/2025 14:54:23 70.06, -47.16 57.46 1.58 69
10 08/19/2025 15:43:56 -69.97, 120.28 122.61 08/19/2025 15:43:53 -69.95, 120.33 122.63 2.83 3
11 08/19/2025 16:34:35 69.60, -71.86 57.02 08/19/2025 16:33:23 69.67, -72.41 57.12 23.28 72
12 08/22/2025 07:10:08 70.04, 68.64 58.34 08/22/2025 07:10:53 70.04, 68.70 58.33 2.23 45
13 08/22/2025 08:00:49 -69.88,-123.81 121.81 08/22/2025 08:00:24 -69.88,-123.89 121.81 2.96 25

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/9/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250809.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 08/09/2025 in txt file.

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