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: 9/20/2025
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 09/23/2025 07:09:51 70.07, 68.71 70.18 09/23/2025 07:11:02 70.06, 68.71 70.16 1.26 71
2 09/23/2025 08:00:32 -69.96,-123.81 109.92 09/23/2025 08:00:31 -69.95,-123.81 109.94 1.93 1
3 09/23/2025 08:51:13 69.71, 43.89 69.84 09/23/2025 08:50:00 69.73, 43.54 69.87 13.78 73
4 09/25/2025 23:26:42 70.02,-175.42 71.17 09/25/2025 23:27:32 70.02,-175.47 71.16 1.91 50
5 09/26/2025 00:17:24 -69.91, -7.94 108.93 09/26/2025 00:17:02 -69.91, -7.99 108.94 1.94 22
6 09/26/2025 01:07:51 68.91, 160.80 70.07 09/26/2025 01:06:45 68.92, 158.33 70.10 98.86 66
7 09/28/2025 15:43:35 70.03, -59.65 72.22 09/28/2025 15:44:02 70.00, -59.61 72.19 2.89 27
8 09/28/2025 16:34:17 -69.91, 107.84 107.89 09/28/2025 16:33:32 -69.90, 107.87 107.91 2.43 45
9 10/01/2025 07:09:50 -70.44,-111.82 106.34 10/01/2025 07:11:01 -70.29,-110.96 106.50 36.23 71
10 10/01/2025 08:00:27 69.99, 56.20 73.21 10/01/2025 08:00:32 69.96, 56.22 73.19 2.44 5
11 10/01/2025 08:51:09 -69.87,-136.31 106.89 10/01/2025 08:50:02 -69.86,-136.29 106.90 1.50 67
12 10/03/2025 23:26:35 -70.04, 4.59 105.72 10/03/2025 23:27:34 -70.07, 4.60 105.69 3.46 59
13 10/04/2025 00:17:18 69.95, 172.04 74.21 10/04/2025 00:17:00 69.95, 172.09 74.22 1.93 18
14 10/04/2025 01:07:49 -69.25, -19.63 106.48 10/04/2025 01:06:40 -69.30, -21.17 106.42 60.78 69

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/20/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250921.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 09/20/2025 in txt file.

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