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: 8/12/2025
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 08/14/2025 07:10:08 -70.01,-111.33 124.27 08/14/2025 07:10:52 -70.03,-111.33 124.26 2.27 44
2 08/14/2025 08:00:52 69.88, 56.17 55.61 08/14/2025 08:00:20 69.87, 56.10 55.61 3.05 32
3 08/16/2025 22:36:35 70.84,-164.19 57.44 08/16/2025 22:37:42 70.70,-162.09 57.22 78.54 67
4 08/16/2025 23:27:02 -69.97, 4.51 123.48 08/16/2025 23:27:23 -69.99, 4.50 123.45 2.81 21
5 08/17/2025 00:17:46 69.90, 171.92 56.47 08/17/2025 00:16:49 69.89, 172.00 56.46 3.30 57
6 08/19/2025 14:53:13 70.02, -47.11 57.44 08/19/2025 14:54:23 70.04, -47.18 57.45 3.39 70
7 08/19/2025 15:43:55 -69.93, 120.34 122.65 08/19/2025 15:43:53 -69.94, 120.30 122.65 1.60 2
8 08/19/2025 16:34:35 69.60, -71.86 57.02 08/19/2025 16:33:23 69.66, -72.43 57.11 22.84 72
9 08/22/2025 07:10:07 70.00, 68.70 58.30 08/22/2025 07:10:53 70.02, 68.67 58.31 2.77 46
10 08/22/2025 08:00:49 -69.90,-123.83 121.80 08/22/2025 08:00:23 -69.91,-123.84 121.78 1.69 26
11 08/24/2025 22:36:35 -71.02, 15.53 119.74 08/24/2025 22:37:41 -70.91, 18.22 119.93 98.60 66
12 08/24/2025 23:27:01 69.98,-175.49 59.18 08/24/2025 23:27:23 69.98,-175.51 59.18 0.62 22
13 08/25/2025 00:17:43 -69.87, -8.02 120.91 08/25/2025 00:16:53 -69.87, -8.02 120.91 0.11 50

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/12/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250813.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 08/12/2025 in txt file.

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