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: 10/20/2025
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 10/22/2025 14:53:29 -70.11, 132.93 98.72 10/22/2025 14:54:30 -70.10, 132.88 98.73 1.94 61
2 10/22/2025 15:44:14 70.02, -59.63 81.21 10/22/2025 15:43:57 70.00, -59.62 81.18 2.43 17
3 10/22/2025 16:34:45 -69.38, 108.63 99.42 10/22/2025 16:33:35 -69.44, 107.25 99.37 54.29 70
4 10/25/2025 07:10:19 -70.07,-111.22 97.83 10/25/2025 07:10:57 -70.07,-111.27 97.83 2.05 38
5 10/25/2025 08:01:04 69.98, 56.22 82.10 10/25/2025 08:00:24 69.96, 56.22 82.07 2.43 40
6 10/27/2025 22:36:37 70.63,-163.63 83.63 10/27/2025 22:37:47 70.49,-162.40 83.49 47.97 70
7 10/27/2025 23:27:09 -70.04, 4.62 96.95 10/27/2025 23:27:23 -70.05, 4.60 96.94 1.59 14
8 10/28/2025 00:17:54 69.96, 172.05 82.98 10/28/2025 00:16:50 69.94, 172.08 82.96 2.32 64
9 10/30/2025 14:53:17 70.14, -47.06 84.03 10/30/2025 14:54:17 70.15, -46.99 84.04 2.87 60
10 10/30/2025 15:43:58 -70.02, 120.44 96.09 10/30/2025 15:43:48 -69.99, 120.41 96.12 3.30 10
11 10/30/2025 16:34:33 69.41, -71.35 83.32 10/30/2025 16:33:23 69.43, -72.71 83.34 53.15 70
12 11/02/2025 07:10:06 70.08, 68.82 84.83 11/02/2025 07:10:42 70.11, 68.84 84.85 2.57 36
13 11/02/2025 08:00:48 -70.01,-123.75 95.24 11/02/2025 08:00:12 -70.00,-123.67 95.25 2.95 36

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 10/20/2025
SNOs_Map_NOAA-21_LANDSAT-8_20251020.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 10/20/2025 in txt file.

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