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: 10/14/2025
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 10/17/2025 07:10:33 70.07, 68.71 79.34 10/17/2025 07:11:01 70.06, 68.69 79.32 1.48 28
2 10/17/2025 08:01:14 -69.96,-123.80 100.76 10/17/2025 08:00:31 -69.95,-123.83 100.78 2.16 43
3 10/19/2025 22:36:46 -70.52, 16.50 99.26 10/19/2025 22:37:57 -70.43, 17.48 99.35 37.71 71
4 10/19/2025 23:27:24 70.06,-175.48 80.30 10/19/2025 23:27:29 70.05,-175.43 80.29 2.24 5
5 10/20/2025 00:18:05 -69.95, -8.00 99.80 10/20/2025 00:16:59 -69.95, -7.95 99.81 2.01 66
6 10/22/2025 14:53:30 -70.15, 132.87 98.68 10/22/2025 14:54:30 -70.13, 132.92 98.70 2.89 60
7 10/22/2025 15:44:14 70.01, -59.61 81.20 10/22/2025 15:43:57 70.02, -59.59 81.20 1.36 17
8 10/22/2025 16:34:46 -69.42, 108.58 99.38 10/22/2025 16:33:35 -69.47, 107.29 99.34 50.48 71
9 10/25/2025 07:10:20 -70.10,-111.27 97.80 10/25/2025 07:10:58 -70.07,-111.27 97.83 3.61 38
10 10/25/2025 08:01:04 69.97, 56.24 82.08 10/25/2025 08:00:25 69.95, 56.21 82.07 1.94 39
11 10/27/2025 22:36:37 70.66,-163.68 83.66 10/27/2025 22:37:46 70.57,-162.28 83.58 52.38 69
12 10/27/2025 23:27:09 -70.06, 4.58 96.93 10/27/2025 23:27:24 -70.03, 4.56 96.96 3.49 15
13 10/28/2025 00:17:53 69.93, 172.09 82.96 10/28/2025 00:16:51 69.91, 172.05 82.94 2.62 62

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 10/14/2025
SNOs_Map_NOAA-21_LANDSAT-8_20251015.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 10/14/2025 in txt file.

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