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: 10/6/2025
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 10/09/2025 06:20:15 70.87, 80.07 77.16 10/09/2025 06:21:22 70.79, 82.13 77.06 75.71 67
2 10/09/2025 07:10:43 -70.08,-111.34 103.64 10/09/2025 07:11:03 -70.08,-111.29 103.64 2.07 20
3 10/09/2025 08:01:27 69.93, 56.18 76.23 10/09/2025 08:00:31 69.92, 56.13 76.21 2.63 56
4 10/11/2025 22:36:53 70.15,-162.99 77.44 10/11/2025 22:38:03 70.16,-162.92 77.44 2.78 70
5 10/11/2025 23:27:34 -70.04, 4.50 102.67 10/11/2025 23:27:33 -70.06, 4.56 102.66 2.57 1
6 10/12/2025 00:18:15 69.74, 172.26 77.05 10/12/2025 00:17:03 69.78, 171.82 77.09 17.44 72
7 10/14/2025 14:53:43 70.13, -47.16 78.41 10/14/2025 14:54:32 70.11, -47.12 78.39 3.19 49
8 10/14/2025 15:44:24 -70.02, 120.33 101.69 10/14/2025 15:44:02 -70.00, 120.36 101.71 2.30 22
9 10/14/2025 16:34:51 68.97, -70.85 77.28 10/14/2025 16:33:45 69.00, -73.33 77.31 98.81 66
10 10/17/2025 07:10:33 70.06, 68.73 79.33 10/17/2025 07:11:01 70.07, 68.71 79.34 0.98 28
11 10/17/2025 08:01:14 -69.95,-123.78 100.78 10/17/2025 08:00:31 -69.97,-123.80 100.76 2.37 43
12 10/19/2025 22:36:47 -70.56, 16.43 99.22 10/19/2025 22:37:57 -70.45, 17.50 99.33 41.65 70
13 10/19/2025 23:27:24 70.06,-175.48 80.29 10/19/2025 23:27:29 70.06,-175.42 80.29 2.29 5
14 10/20/2025 00:18:05 -69.94, -7.98 99.82 10/20/2025 00:16:59 -69.96, -7.92 99.80 2.76 66

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 10/6/2025
SNOs_Map_NOAA-21_LANDSAT-8_20251007.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 10/06/2025 in txt file.

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