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: 9/17/2025
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 -70.60, 166.89 111.14 09/18/2025 12:38:25 -70.52, 167.50 111.23 24.14 72
2 09/18/2025 13:27:52 70.24, -25.22 68.51 09/18/2025 13:27:55 70.26, -25.24 68.53 2.64 3
3 09/18/2025 14:18:34 -70.13, 142.27 111.60 09/18/2025 14:17:25 -70.14, 142.22 111.58 2.19 69
4 09/21/2025 04:54:07 -70.32, -76.90 110.39 09/21/2025 04:54:56 -70.32, -76.91 110.39 0.65 49
5 09/21/2025 05:44:51 70.23, 90.56 69.53 09/21/2025 05:44:23 70.22, 90.59 69.52 1.43 28
6 09/23/2025 20:20:37 71.06,-129.67 71.40 09/23/2025 20:21:45 70.92,-127.75 71.24 71.39 68
7 09/23/2025 21:11:06 -70.26, 38.95 109.41 09/23/2025 21:11:25 -70.27, 38.90 109.41 2.07 19
8 09/23/2025 22:01:50 70.17,-153.59 70.52 09/23/2025 22:00:52 70.16,-153.61 70.51 1.29 58
9 09/26/2025 12:37:23 70.33, -12.71 71.69 09/26/2025 12:38:23 70.36, -12.71 71.72 2.84 60
10 09/26/2025 13:28:06 -70.26, 154.72 108.37 09/26/2025 13:27:53 -70.25, 154.76 108.38 2.08 13
11 09/26/2025 14:18:39 69.59, -36.96 70.97 09/26/2025 14:17:29 69.64, -38.44 71.03 57.82 70
12 09/29/2025 04:54:23 70.34, 103.04 72.74 09/29/2025 04:54:51 70.32, 103.12 72.72 3.70 28
13 09/29/2025 05:45:05 -70.21, -89.44 107.38 09/29/2025 05:44:21 -70.21, -89.40 107.38 1.75 44
14 10/01/2025 20:20:39 -70.48, 51.26 106.09 10/01/2025 20:21:50 -70.43, 51.53 106.15 11.45 71

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/17/2025
SNOs_Map_NPP_LANDSAT-9_20250918.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/17/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9