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: 10/8/2025
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 07:09:47 70.83, 67.60 77.13 10/09/2025 07:10:54 70.71, 69.65 77.00 76.44 67
2 10/09/2025 08:00:15 -70.00,-123.76 103.71 10/09/2025 08:00:35 -70.00,-123.76 103.71 0.13 20
3 10/09/2025 08:50:59 69.89, 43.71 76.20 10/09/2025 08:50:02 69.89, 43.74 76.20 1.40 57
4 10/11/2025 23:26:25 70.12,-175.47 77.41 10/11/2025 23:27:36 70.08,-175.40 77.37 5.04 71
5 10/12/2025 00:17:06 -69.96, -7.92 102.73 10/12/2025 00:17:06 -69.97, -7.92 102.73 0.58 0
6 10/12/2025 01:07:47 69.70, 159.78 77.02 10/12/2025 01:06:35 69.75, 159.43 77.07 14.82 72
7 10/14/2025 15:43:15 70.04, -59.56 78.33 10/14/2025 15:44:07 70.02, -59.61 78.31 3.24 52
8 10/14/2025 16:33:57 -69.94, 107.91 101.76 10/14/2025 16:33:37 -69.91, 107.88 101.79 3.34 20
9 10/14/2025 17:24:25 68.99, -83.41 77.31 10/14/2025 17:23:18 69.03, -85.66 77.34 89.99 67
10 10/17/2025 08:00:06 70.03, 56.26 79.30 10/17/2025 08:00:36 70.04, 56.30 79.31 1.97 30
11 10/17/2025 08:50:48 -69.93,-136.27 100.79 10/17/2025 08:50:06 -69.93,-136.21 100.78 2.70 42
12 10/19/2025 23:26:21 -70.59, 3.86 99.18 10/19/2025 23:27:31 -70.47, 5.17 99.30 50.46 70
13 10/20/2025 00:16:55 69.97, 172.14 80.21 10/20/2025 00:17:05 69.97, 172.09 80.21 2.03 10
14 10/20/2025 01:07:37 -69.87, -20.39 99.88 10/20/2025 01:06:35 -69.87, -20.41 99.88 1.02 62

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/8/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251008.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/08/2025 in txt file.

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