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: 10/2/2025
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 10/03/2025 23:26:33 -70.02, 4.62 105.73 10/03/2025 23:27:30 -70.05, 4.59 105.71 3.26 57
2 10/04/2025 00:17:17 69.92, 172.08 74.19 10/04/2025 00:16:57 69.95, 172.09 74.21 2.81 20
3 10/04/2025 01:07:47 -69.19, -19.53 106.55 10/04/2025 01:06:38 -69.23, -21.25 106.50 68.14 69
4 10/06/2025 15:43:25 -70.03, 120.40 104.70 10/06/2025 15:43:57 -70.00, 120.41 104.73 3.37 32
5 10/06/2025 16:34:08 69.88, -72.06 75.17 10/06/2025 16:33:24 69.89, -72.10 75.18 2.10 44
6 10/09/2025 07:09:37 70.31, 68.44 76.60 10/09/2025 07:10:49 70.22, 68.99 76.50 22.85 72
7 10/09/2025 08:00:15 -70.00,-123.75 103.71 10/09/2025 08:00:21 -70.00,-123.69 103.71 2.36 6
8 10/09/2025 08:50:58 69.84, 43.78 76.15 10/09/2025 08:49:49 69.83, 43.72 76.14 2.95 69
9 10/11/2025 23:26:23 70.03,-175.32 77.32 10/11/2025 23:27:16 70.04,-175.36 77.34 2.37 53
10 10/12/2025 00:17:05 -69.92, -7.85 102.78 10/12/2025 00:16:46 -69.94, -7.87 102.76 1.84 19
11 10/12/2025 01:07:34 69.03, 160.75 76.35 10/12/2025 01:06:27 69.04, 158.57 76.37 86.65 67
12 10/14/2025 15:43:14 70.02, -59.52 78.31 10/14/2025 15:43:39 70.03, -59.47 78.32 2.52 25
13 10/14/2025 16:33:56 -69.91, 107.95 101.78 10/14/2025 16:33:09 -69.93, 108.02 101.77 2.80 47

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/2/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251003.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/02/2025 in txt file.

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