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: 10/8/2025
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 10/09/2025 20:20:51 70.57,-128.89 77.06 10/09/2025 20:22:03 70.49,-128.45 76.98 18.75 72
2 10/09/2025 21:11:30 -70.29, 38.86 103.21 10/09/2025 21:11:35 -70.27, 38.87 103.23 2.68 5
3 10/09/2025 22:02:13 70.15,-153.60 76.67 10/09/2025 22:01:02 70.17,-153.64 76.68 2.42 71
4 10/12/2025 12:37:45 70.33, -12.75 77.84 10/12/2025 12:38:36 70.34, -12.78 77.84 1.56 51
5 10/12/2025 13:28:27 -70.21, 154.75 102.27 10/12/2025 13:28:06 -70.24, 154.69 102.26 3.24 21
6 10/12/2025 14:18:54 69.22, -36.47 76.76 10/12/2025 14:17:48 69.30, -38.95 76.83 98.25 66
7 10/15/2025 04:54:43 70.32, 103.04 78.82 10/15/2025 04:55:06 70.33, 103.08 78.83 1.82 23
8 10/15/2025 05:45:25 -70.20, -89.45 101.29 10/15/2025 05:44:36 -70.23, -89.44 101.27 3.21 49
9 10/17/2025 20:20:56 -70.40, 51.37 100.14 10/17/2025 20:22:08 -70.40, 51.42 100.14 1.63 72
10 10/17/2025 21:11:39 70.26,-141.10 79.74 10/17/2025 21:11:35 70.29,-141.10 79.77 3.04 4
11 10/17/2025 22:02:20 -70.09, 26.49 100.42 10/17/2025 22:01:06 -70.13, 26.31 100.38 8.65 74
12 10/20/2025 12:37:53 -70.35, 167.22 99.22 10/20/2025 12:38:38 -70.33, 167.20 99.24 2.17 45
13 10/20/2025 13:28:36 70.21, -25.25 80.66 10/20/2025 13:28:05 70.22, -25.32 80.66 2.89 31

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/8/2025
SNOs_Map_NPP_LANDSAT-9_20251008.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/08/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9