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: 10/6/2025
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 10/09/2025 07:09:48 70.84, 67.59 77.13 10/09/2025 07:10:55 70.71, 69.65 76.99 76.84 67
2 10/09/2025 08:00:16 -70.00,-123.77 103.71 10/09/2025 08:00:36 -70.00,-123.75 103.71 0.74 20
3 10/09/2025 08:50:59 69.90, 43.70 76.21 10/09/2025 08:50:02 69.89, 43.74 76.20 1.91 57
4 10/11/2025 23:26:25 70.12,-175.48 77.42 10/11/2025 23:27:35 70.13,-175.33 77.42 5.62 70
5 10/12/2025 00:17:06 -69.97, -7.93 102.73 10/12/2025 00:17:06 -69.97, -7.92 102.73 0.52 0
6 10/12/2025 01:07:47 69.71, 159.77 77.03 10/12/2025 01:06:35 69.75, 159.42 77.07 14.24 72
7 10/14/2025 15:43:15 70.05, -59.57 78.34 10/14/2025 15:44:06 70.06, -59.54 78.35 1.49 51
8 10/14/2025 16:33:57 -69.95, 107.90 101.75 10/14/2025 16:33:36 -69.96, 107.95 101.74 1.99 21
9 10/14/2025 17:24:24 68.94, -83.34 77.26 10/14/2025 17:23:18 69.01, -85.68 77.33 93.39 66
10 10/17/2025 08:00:06 70.04, 56.24 79.31 10/17/2025 08:00:36 70.01, 56.27 79.29 2.83 30
11 10/17/2025 08:50:48 -69.94,-136.29 100.78 10/17/2025 08:50:06 -69.91,-136.24 100.80 3.19 42
12 10/19/2025 23:26:22 -70.60, 3.84 99.16 10/19/2025 23:27:31 -70.49, 5.20 99.28 52.05 69
13 10/20/2025 00:16:55 69.98, 172.12 80.23 10/20/2025 00:17:04 69.99, 172.12 80.23 0.83 9
14 10/20/2025 01:07:37 -69.88, -20.41 99.87 10/20/2025 01:06:34 -69.89, -20.38 99.86 1.47 63

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/6/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251007.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/06/2025 in txt file.

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