Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-21 and LANDSAT-8 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/12/2025
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (LANDSAT-8) Time (LANDSAT-8) Lat,Lon (LANDSAT-8) SZA (LANDSAT-8 ) Distance(km) Time Diff (sec)
1 10/14/2025 14:53:43 70.08, -47.09 78.36 10/14/2025 14:54:33 70.10, -47.13 78.38 2.58 50
2 10/14/2025 15:44:24 -69.97, 120.39 101.74 10/14/2025 15:44:03 -69.99, 120.34 101.73 2.35 21
3 10/14/2025 16:34:51 68.97, -70.86 77.28 10/14/2025 16:33:45 69.00, -73.34 77.30 99.06 66
4 10/17/2025 07:10:33 70.06, 68.73 79.33 10/17/2025 07:11:01 70.07, 68.71 79.33 1.04 28
5 10/17/2025 08:01:14 -69.95,-123.79 100.77 10/17/2025 08:00:31 -69.96,-123.81 100.77 1.19 43
6 10/19/2025 22:36:47 -70.56, 16.43 99.22 10/19/2025 22:37:57 -70.45, 17.50 99.33 41.59 70
7 10/19/2025 23:27:24 70.05,-175.47 80.29 10/19/2025 23:27:29 70.06,-175.41 80.30 2.52 5
8 10/20/2025 00:18:05 -69.94, -7.98 99.82 10/20/2025 00:16:59 -69.96, -7.93 99.80 2.67 66
9 10/22/2025 14:53:30 -70.14, 132.89 98.69 10/22/2025 14:54:30 -70.15, 132.94 98.69 2.38 60
10 10/22/2025 15:44:14 70.00, -59.60 81.19 10/22/2025 15:43:58 69.98, -59.65 81.16 3.31 16
11 10/22/2025 16:34:46 -69.41, 108.59 99.40 10/22/2025 16:33:36 -69.43, 107.24 99.38 52.98 70
12 10/25/2025 07:10:20 -70.09,-111.25 97.81 10/25/2025 07:10:58 -70.09,-111.25 97.82 0.56 38
13 10/25/2025 08:01:04 69.96, 56.26 82.08 10/25/2025 08:00:25 69.97, 56.23 82.08 1.59 39

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 10/12/2025
SNOs_Map_NOAA-21_LANDSAT-8_20251013.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 10/12/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and LANDSAT-8