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: 9/16/2025
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 09/18/2025 12:37:13 -70.62, 166.87 111.12 09/18/2025 12:38:25 -70.50, 167.47 111.25 25.97 72
2 09/18/2025 13:27:52 70.26, -25.24 68.53 09/18/2025 13:27:55 70.24, -25.27 68.50 2.31 3
3 09/18/2025 14:18:34 -70.15, 142.24 111.58 09/18/2025 14:17:25 -70.12, 142.20 111.60 3.27 69
4 09/21/2025 04:54:08 -70.34, -76.93 110.37 09/21/2025 04:54:56 -70.35, -76.86 110.36 2.79 48
5 09/21/2025 05:44:51 70.19, 90.61 69.50 09/21/2025 05:44:24 70.19, 90.55 69.50 2.16 27
6 09/23/2025 20:20:36 71.03,-129.62 71.37 09/23/2025 20:21:44 70.95,-127.70 71.27 69.92 68
7 09/23/2025 21:11:06 -70.28, 38.92 109.39 09/23/2025 21:11:24 -70.29, 38.94 109.38 1.42 18
8 09/23/2025 22:01:50 70.19,-153.63 70.54 09/23/2025 22:00:51 70.19,-153.57 70.53 2.21 59
9 09/26/2025 12:37:23 70.35, -12.75 71.72 09/26/2025 12:38:23 70.32, -12.76 71.68 3.50 60
10 09/26/2025 13:28:05 -70.23, 154.77 108.40 09/26/2025 13:27:53 -70.22, 154.72 108.41 2.26 12
11 09/26/2025 14:18:38 69.56, -36.91 70.94 09/26/2025 14:17:29 69.61, -38.49 71.00 61.22 69
12 09/29/2025 04:54:22 70.31, 103.08 72.71 09/29/2025 04:54:50 70.33, 103.15 72.73 3.44 28
13 09/29/2025 05:45:04 -70.18, -89.40 107.41 09/29/2025 05:44:21 -70.18, -89.45 107.42 2.07 43

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/16/2025
SNOs_Map_NPP_LANDSAT-9_20250917.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/16/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9