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: 11/21/2025
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 11/23/2025 14:53:44 -70.12, 132.87 89.51 11/23/2025 14:54:36 -70.11, 132.86 89.53 1.73 52
2 11/23/2025 15:44:28 70.01, -59.64 90.38 11/23/2025 15:44:03 70.00, -59.65 90.38 0.46 25
3 11/23/2025 16:34:54 -69.06, 109.04 90.56 11/23/2025 16:33:47 -69.12, 106.80 90.50 89.42 67
4 11/26/2025 06:20:16 70.93, 80.01 91.83 11/26/2025 06:21:23 70.87, 82.23 91.76 81.31 67
5 11/26/2025 07:10:44 -70.09,-111.33 89.02 11/26/2025 07:11:05 -70.11,-111.27 89.01 2.76 21
6 11/26/2025 08:01:27 69.93, 56.22 90.83 11/26/2025 08:00:33 69.94, 56.15 90.84 3.24 54
7 11/28/2025 22:37:00 70.13,-162.95 91.49 11/28/2025 22:38:04 70.13,-162.99 91.49 1.47 64
8 11/28/2025 23:27:42 -70.02, 4.54 88.62 11/28/2025 23:27:34 -70.02, 4.50 88.61 1.75 8
9 11/29/2025 00:18:18 69.49, 172.63 90.86 11/29/2025 00:17:08 69.53, 171.46 90.90 45.82 70
10 12/01/2025 14:53:59 70.06, -47.10 91.86 12/01/2025 14:54:33 70.08, -47.17 91.87 3.40 34
11 12/01/2025 15:44:42 -70.00, 120.32 88.21 12/01/2025 15:44:03 -69.98, 120.31 88.23 2.55 39
12 12/04/2025 06:20:20 -70.41, -99.19 87.42 12/04/2025 06:21:32 -70.29, -98.64 87.55 24.86 72
13 12/04/2025 07:10:59 70.06, 68.67 92.23 12/04/2025 07:11:01 70.06, 68.69 92.23 0.75 2
14 12/04/2025 08:01:41 -69.94,-123.83 87.89 12/04/2025 08:00:31 -69.96,-123.82 87.87 2.69 70

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 11/21/2025
SNOs_Map_NOAA-21_LANDSAT-8_20251121.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 11/21/2025 in txt file.

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