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: 10/13/2025
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 78.37 10/14/2025 14:54:33 70.09, -47.14 78.37 2.08 50
2 10/14/2025 15:44:24 -69.98, 120.39 101.73 10/14/2025 15:44:03 -69.98, 120.33 101.73 2.02 21
3 10/14/2025 16:34:52 68.98, -70.87 77.29 10/14/2025 16:33:46 68.99, -73.35 77.30 99.06 66
4 10/17/2025 07:10:33 70.06, 68.72 79.33 10/17/2025 07:11:01 70.06, 68.70 79.33 0.85 28
5 10/17/2025 08:01:14 -69.96,-123.79 100.77 10/17/2025 08:00:31 -69.95,-123.82 100.77 1.17 43
6 10/19/2025 22:36:47 -70.56, 16.42 99.21 10/19/2025 22:37:57 -70.44, 17.49 99.34 41.82 70
7 10/19/2025 23:27:24 70.06,-175.47 80.29 10/19/2025 23:27:29 70.06,-175.42 80.29 2.05 5
8 10/20/2025 00:18:05 -69.95, -7.99 99.81 10/20/2025 00:16:59 -69.95, -7.94 99.81 1.92 66
9 10/22/2025 14:53:30 -70.14, 132.88 98.69 10/22/2025 14:54:30 -70.14, 132.93 98.69 1.99 60
10 10/22/2025 15:44:14 70.00, -59.60 81.19 10/22/2025 15:43:57 70.02, -59.58 81.21 2.66 17
11 10/22/2025 16:34:46 -69.41, 108.59 99.39 10/22/2025 16:33:36 -69.42, 107.23 99.39 53.21 70
12 10/25/2025 07:10:20 -70.09,-111.25 97.81 10/25/2025 07:10:58 -70.08,-111.26 97.82 1.72 38
13 10/25/2025 08:01:04 69.96, 56.26 82.07 10/25/2025 08:00:25 69.96, 56.22 82.08 1.53 39

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 10/13/2025
SNOs_Map_NOAA-21_LANDSAT-8_20251014.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 10/13/2025 in txt file.

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