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: 9/13/2025
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 09/15/2025 21:10:53 70.31,-141.08 67.54 09/15/2025 21:11:26 70.28,-141.09 67.52 2.87 33
2 09/15/2025 22:01:35 -70.20, 26.40 112.56 09/15/2025 22:00:55 -70.22, 26.45 112.54 2.94 40
3 09/18/2025 12:37:14 -70.65, 166.82 111.09 09/18/2025 12:38:25 -70.53, 167.51 111.22 28.96 71
4 09/18/2025 13:27:52 70.24, -25.21 68.51 09/18/2025 13:27:55 70.26, -25.23 68.53 3.09 3
5 09/18/2025 14:18:35 -70.18, 142.20 111.55 09/18/2025 14:17:25 -70.15, 142.24 111.57 3.25 70
6 09/21/2025 04:54:07 -70.32, -76.89 110.39 09/21/2025 04:54:56 -70.34, -76.89 110.38 2.18 49
7 09/21/2025 05:44:51 70.22, 90.56 69.53 09/21/2025 05:44:23 70.23, 90.61 69.54 1.75 28
8 09/23/2025 20:20:37 71.06,-129.66 71.39 09/23/2025 20:21:45 70.95,-127.71 71.26 71.60 68
9 09/23/2025 21:11:07 -70.30, 38.89 109.37 09/23/2025 21:11:25 -70.29, 38.94 109.38 2.30 18
10 09/23/2025 22:01:50 70.16,-153.58 70.51 09/23/2025 22:00:52 70.18,-153.58 70.53 2.15 58
11 09/26/2025 12:37:23 70.32, -12.69 71.68 09/26/2025 12:38:24 70.34, -12.74 71.70 2.63 61
12 09/26/2025 13:28:06 -70.24, 154.74 108.39 09/26/2025 13:27:54 -70.23, 154.74 108.40 1.35 12
13 09/26/2025 14:18:39 69.58, -36.94 70.96 09/26/2025 14:17:30 69.62, -38.47 71.02 59.42 69

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/13/2025
SNOs_Map_NPP_LANDSAT-9_20250914.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/13/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9