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 12:37:08 71.12, -13.94 66.35 09/10/2025 12:38:15 71.00, -11.78 66.18 79.46 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 1.59 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 1.94 57
4 09/13/2025 04:53:54 70.36, 103.07 66.58 09/13/2025 04:54:56 70.35, 103.12 66.56 2.80 62
5 09/13/2025 05:44:36 -70.26, -89.45 113.52 09/13/2025 05:44:26 -70.23, -89.40 113.55 2.84 10
6 09/13/2025 06:35:11 69.67, 78.75 65.90 09/13/2025 06:34:01 69.69, 77.47 65.94 49.15 70
7 09/15/2025 21:10:52 70.29,-141.06 67.53 09/15/2025 21:11:25 70.27,-141.10 67.51 2.51 33
8 09/15/2025 22:01:34 -70.18, 26.43 112.58 09/15/2025 22:00:55 -70.16, 26.38 112.59 2.59 39
9 09/18/2025 12:37:12 -70.58, 166.93 111.16 09/18/2025 12:38:24 -70.50, 167.48 111.25 22.01 72
10 09/18/2025 13:27:51 70.22, -25.20 68.49 09/18/2025 13:27:54 70.23, -25.28 68.50 3.09 3
11 09/18/2025 14:18:34 -70.16, 142.22 111.57 09/18/2025 14:17:23 -70.18, 142.28 111.55 3.10 71
12 09/21/2025 04:54:07 -70.30, -76.87 110.41 09/21/2025 04:54:55 -70.33, -76.89 110.39 2.58 48
13 09/21/2025 05:44:51 70.22, 90.58 69.52 09/21/2025 05:44:22 70.21, 90.59 69.52 0.65 29

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/8/2025
SNOs_Map_NPP_LANDSAT-9_20250908.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