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: 7/28/2025
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 07/29/2025 06:20:31 -70.12, -98.84 128.56 07/29/2025 06:21:13 -70.11, -98.83 128.58 0.60 42
2 07/29/2025 07:11:15 70.02, 68.62 51.34 07/29/2025 07:10:40 70.01, 68.67 51.34 2.11 35
3 07/31/2025 21:46:54 70.78,-151.44 52.79 07/31/2025 21:48:02 70.70,-149.71 52.64 63.98 68
4 07/31/2025 22:37:25 -70.08, 16.98 127.94 07/31/2025 22:37:41 -70.10, 17.04 127.93 2.92 16
5 07/31/2025 23:28:08 69.94,-175.49 51.92 07/31/2025 23:27:09 69.94,-175.55 51.93 2.03 59
6 08/03/2025 14:03:37 70.12, -34.63 52.78 08/03/2025 14:04:41 70.12, -34.68 52.77 1.73 64
7 08/03/2025 14:54:19 -70.00, 132.87 127.34 08/03/2025 14:54:11 -70.02, 132.80 127.32 2.73 8
8 08/03/2025 15:44:55 69.49, -59.07 52.14 08/03/2025 15:43:44 69.57, -60.16 52.27 43.49 71
9 08/06/2025 06:20:32 70.11, 81.16 53.49 08/06/2025 06:21:09 70.13, 81.22 53.50 2.93 37
10 08/06/2025 07:11:14 -69.98,-111.33 126.64 08/06/2025 07:10:40 -69.97,-111.38 126.65 2.32 34
11 08/08/2025 21:46:54 -70.75, 28.60 125.10 08/08/2025 21:48:03 -70.61, 30.17 125.30 59.66 69
12 08/08/2025 22:37:26 70.05,-162.97 54.17 08/08/2025 22:37:38 70.06,-162.99 54.18 1.63 12
13 08/08/2025 23:28:09 -69.97, 4.46 125.90 08/08/2025 23:27:08 -69.96, 4.50 125.91 1.89 61

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 7/28/2025
SNOs_Map_NOAA-21_LANDSAT-8_20250728.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 07/28/2025 in txt file.

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