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: 9/13/2025
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 09/15/2025 07:09:55 -70.04,-111.27 112.94 09/15/2025 07:11:00 -70.07,-111.27 112.92 3.55 65
2 09/15/2025 08:00:39 69.94, 56.18 66.97 09/15/2025 08:00:28 69.92, 56.16 66.95 2.80 11
3 09/15/2025 08:51:14 -69.47,-135.80 113.50 09/15/2025 08:50:03 -69.53,-136.75 113.43 37.45 71
4 09/17/2025 23:26:48 -70.02, 4.54 111.93 09/17/2025 23:27:30 -70.01, 4.52 111.95 1.59 42
5 09/18/2025 00:17:32 69.93, 171.99 67.99 09/18/2025 00:16:57 69.90, 172.02 67.96 2.64 35
6 09/20/2025 14:53:11 70.75, -48.15 69.84 09/20/2025 14:54:19 70.64, -46.30 69.70 68.93 68
7 09/20/2025 15:43:41 -70.01, 120.34 110.91 09/20/2025 15:43:59 -69.98, 120.37 110.94 2.94 18
8 09/20/2025 16:34:24 69.86, -72.13 68.96 09/20/2025 16:33:26 69.87, -72.13 68.97 1.48 58
9 09/23/2025 07:09:50 70.06, 68.73 70.17 09/23/2025 07:10:57 70.05, 68.72 70.15 1.39 67
10 09/23/2025 08:00:32 -69.94,-123.78 109.94 09/23/2025 08:00:27 -69.94,-123.80 109.94 0.89 5
11 09/23/2025 08:51:10 69.54, 44.13 69.67 09/23/2025 08:49:58 69.61, 43.39 69.75 30.04 72
12 09/25/2025 23:26:42 70.00,-175.40 71.16 09/25/2025 23:27:26 69.99,-175.48 71.14 3.50 44
13 09/26/2025 00:17:25 -69.94, -7.99 108.90 09/26/2025 00:16:55 -69.94, -7.91 108.90 2.88 30

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/13/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250914.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 09/13/2025 in txt file.

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