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: 9/9/2025
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 12:37:08 71.12, -13.94 66.35 09/10/2025 12:38:15 71.00, -11.77 66.18 79.43 67
2 09/10/2025 13:27:36 -70.29, 154.74 114.51 09/10/2025 13:27:56 -70.28, 154.78 114.52 1.73 20
3 09/10/2025 14:18:20 70.18, -37.77 65.40 09/10/2025 14:17:23 70.18, -37.72 65.40 2.02 57
4 09/13/2025 04:53:54 70.36, 103.07 66.58 09/13/2025 04:54:56 70.36, 103.14 66.57 2.56 62
5 09/13/2025 05:44:36 -70.26, -89.45 113.52 09/13/2025 05:44:26 -70.24, -89.39 113.54 2.46 10
6 09/13/2025 06:35:11 69.67, 78.75 65.90 09/13/2025 06:34:01 69.70, 77.49 65.95 48.79 70
7 09/15/2025 21:10:52 70.29,-141.05 67.53 09/15/2025 21:11:25 70.30,-141.07 67.53 1.19 33
8 09/15/2025 22:01:34 -70.18, 26.44 112.58 09/15/2025 22:00:55 -70.19, 26.41 112.57 1.61 39
9 09/18/2025 12:37:13 -70.63, 166.85 111.11 09/18/2025 12:38:24 -70.54, 167.54 111.21 26.99 71
10 09/18/2025 13:27:52 70.27, -25.27 68.54 09/18/2025 13:27:54 70.27, -25.22 68.54 2.08 2
11 09/18/2025 14:18:34 -70.15, 142.23 111.57 09/18/2025 14:17:24 -70.17, 142.26 111.56 1.84 70
12 09/21/2025 04:54:08 -70.35, -76.94 110.36 09/21/2025 04:54:56 -70.34, -76.88 110.37 2.72 48
13 09/21/2025 05:44:51 70.21, 90.59 69.51 09/21/2025 05:44:23 70.23, 90.61 69.54 2.54 28

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/9/2025
SNOs_Map_NPP_LANDSAT-9_20250910.jpg

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

Historial Predications of SNOs between NPP and LANDSAT-9