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: 7/22/2025
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 07/23/2025 22:36:26 -70.38, 16.53 129.47 07/23/2025 22:37:37 -70.30, 17.33 129.59 31.18 71
2 07/23/2025 23:27:05 69.98,-175.55 50.12 07/23/2025 23:27:08 69.98,-175.49 50.12 2.36 3
3 07/24/2025 00:17:46 -69.85, -8.05 130.01 07/24/2025 00:16:38 -69.87, -8.01 129.98 2.63 68
4 07/26/2025 14:53:14 -70.03, 132.83 129.25 07/26/2025 14:54:11 -70.03, 132.82 129.26 0.39 57
5 07/26/2025 15:43:58 69.90, -59.66 50.62 07/26/2025 15:43:38 69.92, -59.69 50.64 2.83 20
6 07/26/2025 16:34:28 -69.19, 108.69 130.12 07/26/2025 16:33:19 -69.21, 106.98 130.02 67.31 69
7 07/29/2025 07:10:09 -70.01,-111.36 128.66 07/29/2025 07:10:41 -70.02,-111.32 128.66 1.71 32
8 07/29/2025 08:00:53 69.88, 56.14 51.22 07/29/2025 08:00:08 69.90, 56.17 51.24 2.74 45
9 07/31/2025 22:36:27 70.33,-163.41 52.33 07/31/2025 22:37:38 70.25,-162.74 52.21 26.78 71
10 07/31/2025 23:27:04 -69.99, 4.44 128.03 07/31/2025 23:27:11 -69.98, 4.52 128.04 2.82 7
11 08/01/2025 00:17:48 69.86, 171.94 51.86 08/01/2025 00:16:38 69.87, 172.00 51.87 2.21 70
12 08/03/2025 14:53:16 70.00, -47.12 52.68 08/03/2025 14:54:11 70.03, -47.17 52.69 3.26 55
13 08/03/2025 15:43:58 -69.92, 120.32 127.41 08/03/2025 15:43:41 -69.93, 120.33 127.39 1.61 17
14 08/03/2025 16:34:28 69.05, -71.12 51.70 08/03/2025 16:33:21 69.09, -73.15 51.83 80.97 67

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/22/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250722.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 07/22/2025 in txt file.

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