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: 9/11/2025
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 09/12/2025 14:53:13 -70.65, 131.99 113.34 09/12/2025 14:54:22 -70.55, 133.55 113.47 58.74 69
2 09/12/2025 15:43:46 69.97, -59.64 65.98 09/12/2025 15:43:58 69.96, -59.66 65.97 1.13 12
3 09/12/2025 16:34:28 -69.87, 107.83 114.12 09/12/2025 16:33:28 -69.85, 107.81 114.14 2.47 60
4 09/15/2025 07:09:55 -70.05,-111.28 112.94 09/15/2025 07:11:00 -70.07,-111.27 112.92 2.56 65
5 09/15/2025 08:00:39 69.95, 56.17 66.98 09/15/2025 08:00:27 69.97, 56.23 67.00 2.74 12
6 09/15/2025 08:51:14 -69.47,-135.81 113.50 09/15/2025 08:50:03 -69.52,-136.75 113.43 37.20 71
7 09/17/2025 23:26:48 -70.02, 4.53 111.93 09/17/2025 23:27:30 -70.00, 4.52 111.96 2.38 42
8 09/18/2025 00:17:31 69.88, 172.06 67.94 09/18/2025 00:16:57 69.90, 172.01 67.96 2.78 34
9 09/20/2025 14:53:11 70.75, -48.16 69.85 09/20/2025 14:54:19 70.63, -46.31 69.70 69.17 68
10 09/20/2025 15:43:40 -69.96, 120.42 110.96 09/20/2025 15:43:59 -69.98, 120.37 110.95 3.08 19
11 09/20/2025 16:34:24 69.87, -72.14 68.96 09/20/2025 16:33:26 69.87, -72.14 68.96 0.25 58
12 09/23/2025 07:09:50 70.06, 68.72 70.17 09/23/2025 07:10:57 70.04, 68.71 70.15 2.61 67
13 09/23/2025 08:00:32 -69.95,-123.78 109.94 09/23/2025 08:00:27 -69.94,-123.81 109.95 1.48 5
14 09/23/2025 08:51:10 69.54, 44.13 69.67 09/23/2025 08:49:58 69.60, 43.38 69.74 29.86 72

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/11/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250912.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 09/11/2025 in txt file.

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