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: 9/16/2025
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 09/17/2025 23:26:48 -70.04, 4.51 111.92 09/17/2025 23:27:29 -70.04, 4.57 111.92 2.07 41
2 09/18/2025 00:17:31 69.88, 172.05 67.94 09/18/2025 00:16:57 69.88, 171.99 67.94 2.24 34
3 09/20/2025 14:53:11 70.76, -48.17 69.85 09/20/2025 14:54:19 70.61, -46.35 69.67 69.14 68
4 09/20/2025 15:43:40 -69.97, 120.40 110.95 09/20/2025 15:43:59 -69.95, 120.33 110.97 3.52 19
5 09/20/2025 16:34:24 69.87, -72.15 68.97 09/20/2025 16:33:26 69.84, -72.17 68.94 3.41 58
6 09/23/2025 07:09:51 70.07, 68.71 70.18 09/23/2025 07:10:57 70.06, 68.74 70.17 1.75 66
7 09/23/2025 08:00:33 -69.96,-123.80 109.92 09/23/2025 08:00:27 -69.95,-123.78 109.93 1.46 6
8 09/23/2025 08:51:10 69.50, 44.19 69.63 09/23/2025 08:49:59 69.57, 43.33 69.71 34.29 71
9 09/25/2025 23:26:42 70.02,-175.42 71.17 09/25/2025 23:27:24 70.04,-175.41 71.19 2.18 42
10 09/26/2025 00:17:24 -69.91, -7.94 108.94 09/26/2025 00:16:54 -69.93, -7.92 108.91 2.92 30
11 09/28/2025 14:53:06 -70.90, 131.65 106.91 09/28/2025 14:54:13 -70.77, 133.91 107.07 83.81 67
12 09/28/2025 15:43:34 69.97, -59.57 72.16 09/28/2025 15:43:52 70.00, -59.57 72.19 2.85 18
13 09/28/2025 16:34:17 -69.91, 107.84 107.89 09/28/2025 16:33:22 -69.89, 107.92 107.91 3.23 55

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/16/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250917.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 09/16/2025 in txt file.

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