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: 9/14/2025
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 07:09:56 -70.07,-111.32 112.91 09/15/2025 07:11:01 -70.04,-111.31 112.95 3.28 65
2 09/15/2025 08:00:39 69.92, 56.22 66.95 09/15/2025 08:00:28 69.94, 56.19 66.97 2.88 11
3 09/15/2025 08:51:15 -69.50,-135.84 113.47 09/15/2025 08:50:03 -69.55,-136.71 113.40 34.36 72
4 09/17/2025 23:26:48 -70.05, 4.49 111.90 09/17/2025 23:27:29 -70.03, 4.56 111.93 3.27 41
5 09/18/2025 00:17:31 69.90, 172.03 67.96 09/18/2025 00:16:56 69.93, 172.06 67.99 3.10 35
6 09/20/2025 14:53:10 70.73, -48.11 69.82 09/20/2025 14:54:18 70.66, -46.27 69.73 68.07 68
7 09/20/2025 15:43:40 -69.98, 120.38 110.94 09/20/2025 15:43:58 -70.01, 120.40 110.92 2.65 18
8 09/20/2025 16:34:24 69.89, -72.17 68.99 09/20/2025 16:33:25 69.90, -72.10 68.99 2.88 59
9 09/23/2025 07:09:51 70.09, 68.69 70.20 09/23/2025 07:10:57 70.07, 68.75 70.18 3.00 66
10 09/23/2025 08:00:33 -69.97,-123.82 109.91 09/23/2025 08:00:27 -69.96,-123.77 109.92 2.39 6
11 09/23/2025 08:51:10 69.51, 44.17 69.64 09/23/2025 08:49:59 69.58, 43.34 69.72 32.89 71
12 09/25/2025 23:26:43 70.03,-175.44 71.18 09/25/2025 23:27:26 70.01,-175.45 71.16 2.42 43
13 09/26/2025 00:17:25 -69.92, -7.95 108.93 09/26/2025 00:16:56 -69.91, -7.96 108.94 1.14 29

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/14/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250915.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 09/14/2025 in txt file.

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