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: 9/15/2025
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 70.30,-141.08 67.54 09/15/2025 21:11:26 70.28,-141.09 67.52 2.46 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 2.79 40
3 09/18/2025 12:37:14 -70.65, 166.81 111.09 09/18/2025 12:38:25 -70.52, 167.50 111.23 29.18 71
4 09/18/2025 13:27:51 70.24, -25.21 68.50 09/18/2025 13:27:54 70.26, -25.24 68.53 2.69 3
5 09/18/2025 14:18:33 -70.12, 142.27 111.60 09/18/2025 14:17:24 -70.14, 142.23 111.58 2.65 69
6 09/21/2025 04:54:07 -70.32, -76.90 110.39 09/21/2025 04:54:56 -70.32, -76.91 110.39 0.35 49
7 09/21/2025 05:44:51 70.23, 90.56 69.53 09/21/2025 05:44:23 70.22, 90.59 69.52 1.59 28
8 09/23/2025 20:20:37 71.07,-129.68 71.40 09/23/2025 20:21:44 70.98,-127.67 71.29 73.39 67
9 09/23/2025 21:11:06 -70.26, 38.95 109.41 09/23/2025 21:11:25 -70.27, 38.90 109.41 2.03 19
10 09/23/2025 22:01:50 70.17,-153.60 70.52 09/23/2025 22:00:52 70.16,-153.61 70.50 1.83 58
11 09/26/2025 12:37:23 70.34, -12.72 71.70 09/26/2025 12:38:23 70.35, -12.72 71.71 1.73 60
12 09/26/2025 13:28:06 -70.26, 154.71 108.37 09/26/2025 13:27:53 -70.25, 154.76 108.39 2.55 13
13 09/26/2025 14:18:38 69.54, -36.89 70.92 09/26/2025 14:17:29 69.64, -38.45 71.03 61.42 69
14 09/29/2025 04:54:22 70.29, 103.11 72.70 09/29/2025 04:54:51 70.31, 103.11 72.71 1.95 29
15 09/29/2025 05:45:04 -70.22, -89.45 107.37 09/29/2025 05:44:20 -70.21, -89.40 107.38 2.07 44

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/15/2025
SNOs_Map_NPP_LANDSAT-9_20250916.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/15/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9