Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-20 and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/30/2025
Index Date (NOAA-20) Time (NOAA-20) Lat,Lon (NOAA-20) SZA (NOAA-20 ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 11/02/2025 07:10:08 -70.07,-111.29 95.19 11/02/2025 07:11:05 -70.08,-111.26 95.18 1.38 57
2 11/02/2025 08:00:52 69.94, 56.22 84.69 11/02/2025 08:00:33 69.92, 56.15 84.67 3.21 19
3 11/02/2025 08:51:22 -69.22,-135.42 96.01 11/02/2025 08:50:13 -69.26,-137.10 95.98 66.47 69
4 11/04/2025 23:27:09 -70.04, 4.51 94.39 11/04/2025 23:27:37 -70.04, 4.55 94.40 1.75 28
5 11/05/2025 00:17:53 69.91, 172.02 85.49 11/05/2025 00:17:04 69.93, 172.04 85.51 2.23 49
6 11/07/2025 14:53:28 70.10, -47.15 86.46 11/07/2025 14:54:38 70.12, -47.10 86.48 2.55 70
7 11/07/2025 15:44:09 -69.97, 120.37 93.66 11/07/2025 15:44:09 -69.96, 120.31 93.68 2.32 0
8 11/07/2025 16:34:50 69.67, -71.88 86.06 11/07/2025 16:33:38 69.74, -72.35 86.11 19.27 72
9 11/10/2025 07:10:28 70.04, 68.70 87.16 11/10/2025 07:11:09 70.06, 68.70 87.19 2.69 41
10 11/10/2025 08:01:10 -69.96,-123.86 92.91 11/10/2025 08:00:39 -69.96,-123.80 92.91 2.29 31
11 11/12/2025 22:36:54 -70.69, 16.11 91.46 11/12/2025 22:38:03 -70.59, 17.70 91.57 59.85 69
12 11/12/2025 23:27:27 69.99,-175.47 87.84 11/12/2025 23:27:39 69.98,-175.54 87.83 2.69 12
13 11/13/2025 00:18:09 -69.90, -8.02 92.24 11/13/2025 00:17:09 -69.88, -8.04 92.26 2.31 60

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/30/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251031.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/30/2025 in txt file.

Historial Predications of SNOs between NOAA-20 and LANDSAT-9