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: 10/12/2025
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 10/14/2025 15:43:14 70.02, -59.52 78.31 10/14/2025 15:44:06 70.04, -59.58 78.33 3.11 52
2 10/14/2025 16:33:56 -69.92, 107.94 101.77 10/14/2025 16:33:36 -69.93, 107.90 101.77 1.39 20
3 10/14/2025 17:24:24 68.96, -83.37 77.28 10/14/2025 17:23:17 69.05, -85.64 77.37 90.56 67
4 10/17/2025 08:00:05 70.00, 56.29 79.28 10/17/2025 08:00:36 70.00, 56.25 79.28 1.53 31
5 10/17/2025 08:50:47 -69.91,-136.25 100.80 10/17/2025 08:50:06 -69.90,-136.26 100.82 1.77 41
6 10/19/2025 23:26:21 -70.58, 3.88 99.19 10/19/2025 23:27:31 -70.48, 5.19 99.28 49.67 70
7 10/20/2025 00:16:56 70.00, 172.09 80.25 10/20/2025 00:17:05 69.99, 172.12 80.24 1.48 9
8 10/20/2025 01:07:38 -69.91, -20.45 99.84 10/20/2025 01:06:35 -69.89, -20.39 99.86 3.00 63
9 10/22/2025 15:43:02 -70.06, 120.49 98.76 10/22/2025 15:44:07 -70.06, 120.46 98.76 1.34 65
10 10/22/2025 16:33:46 69.95, -72.04 81.15 10/22/2025 16:33:34 69.95, -72.06 81.14 0.68 12
11 10/22/2025 17:24:21 -69.49, 95.96 99.31 10/22/2025 17:23:10 -69.52, 94.98 99.28 38.23 71
12 10/25/2025 07:59:52 -70.07,-123.73 97.82 10/25/2025 08:00:34 -70.05,-123.67 97.84 3.29 42
13 10/25/2025 08:50:35 69.91, 43.81 82.04 10/25/2025 08:50:01 69.93, 43.81 82.06 2.15 34

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/12/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251013.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/12/2025 in txt file.

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