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 -70.13, 132.89 98.70 10/22/2025 14:54:29 -70.14, 132.93 98.69 1.69 60
2 10/22/2025 15:44:13 69.99, -59.58 81.17 10/22/2025 15:43:57 69.98, -59.65 81.16 2.74 16
3 10/22/2025 16:34:45 -69.40, 108.60 99.40 10/22/2025 16:33:35 -69.43, 107.23 99.39 53.74 70
4 10/25/2025 07:10:19 -70.09,-111.25 97.81 10/25/2025 07:10:56 -70.11,-111.21 97.79 2.67 37
5 10/25/2025 08:01:03 69.95, 56.27 82.07 10/25/2025 08:00:24 69.95, 56.20 82.06 2.75 39
6 10/27/2025 22:36:37 70.65,-163.66 83.65 10/27/2025 22:37:46 70.54,-162.33 83.54 50.52 69
7 10/27/2025 23:27:09 -70.06, 4.59 96.93 10/27/2025 23:27:23 -70.04, 4.58 96.95 1.68 14
8 10/28/2025 00:17:53 69.92, 172.10 82.95 10/28/2025 00:16:50 69.93, 172.07 82.95 1.64 63
9 10/30/2025 14:53:17 70.11, -47.01 83.99 10/30/2025 14:54:19 70.10, -47.07 83.98 2.58 62
10 10/30/2025 15:43:59 -70.04, 120.42 96.07 10/30/2025 15:43:48 -70.05, 120.49 96.06 2.89 11
11 10/30/2025 16:34:33 69.38, -71.30 83.29 10/30/2025 16:33:24 69.43, -72.71 83.34 55.48 69
12 11/02/2025 07:10:06 70.10, 68.79 84.85 11/02/2025 07:10:42 70.12, 68.85 84.86 2.76 36
13 11/02/2025 08:00:47 -69.98,-123.70 95.27 11/02/2025 08:00:13 -69.96,-123.74 95.30 2.70 34

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 10/20/2025
SNOs_Map_NOAA-21_LANDSAT-8_20251021.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