Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NPP and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 9/8/2025
Index Date (NPP) Time (NPP) Lat,Lon (NPP) SZA (NPP ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 09/10/2025 12:37:07 71.09, -13.89 66.31 09/10/2025 12:38:14 71.03, -11.72 66.21 78.41 67
2 09/10/2025 13:27:35 -70.26, 154.79 114.54 09/10/2025 13:27:56 -70.26, 154.75 114.54 1.81 21
3 09/10/2025 14:18:19 70.14, -37.72 65.36 09/10/2025 14:17:23 70.16, -37.75 65.38 1.96 56
4 09/13/2025 04:53:53 70.33, 103.12 66.54 09/13/2025 04:54:56 70.33, 103.10 66.54 0.89 63
5 09/13/2025 05:44:35 -70.22, -89.40 113.56 09/13/2025 05:44:26 -70.22, -89.43 113.57 1.64 9
6 09/13/2025 06:35:10 69.64, 78.79 65.87 09/13/2025 06:34:00 69.73, 77.52 65.97 49.96 70
7 09/15/2025 21:10:53 70.31,-141.09 67.55 09/15/2025 21:11:25 70.31,-141.04 67.55 1.93 32
8 09/15/2025 22:01:35 -70.20, 26.40 112.56 09/15/2025 22:00:55 -70.20, 26.44 112.55 1.47 40
9 09/18/2025 12:37:13 -70.60, 166.90 111.14 09/18/2025 12:38:25 -70.49, 167.47 111.26 23.89 72
10 09/18/2025 13:27:52 70.24, -25.22 68.51 09/18/2025 13:27:55 70.22, -25.29 68.49 3.32 3
11 09/18/2025 14:18:35 -70.18, 142.19 111.55 09/18/2025 14:17:24 -70.17, 142.27 111.55 3.02 71
12 09/21/2025 04:54:07 -70.32, -76.90 110.39 09/21/2025 04:54:55 -70.33, -76.89 110.39 0.67 48
13 09/21/2025 05:44:51 70.23, 90.55 69.54 09/21/2025 05:44:22 70.22, 90.59 69.52 2.59 29

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/8/2025
SNOs_Map_NPP_LANDSAT-9_20250909.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/08/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9