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: 9/22/2025
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 09/23/2025 20:20:40 71.23,-129.96 71.57 09/23/2025 20:21:46 71.15,-127.41 71.47 91.57 66
2 09/23/2025 21:11:06 -70.28, 38.93 109.39 09/23/2025 21:11:30 -70.27, 38.88 109.40 1.81 24
3 09/23/2025 22:01:50 70.18,-153.61 70.53 09/23/2025 22:00:57 70.17,-153.61 70.52 0.60 53
4 09/26/2025 12:37:23 70.35, -12.74 71.71 09/26/2025 12:38:31 70.33, -12.78 71.69 2.59 68
5 09/26/2025 13:28:05 -70.23, 154.76 108.40 09/26/2025 13:28:01 -70.22, 154.69 108.41 2.99 4
6 09/26/2025 14:18:43 69.82, -37.30 71.21 09/26/2025 14:17:32 69.90, -38.13 71.29 32.60 71
7 09/29/2025 04:54:22 70.32, 103.06 72.73 09/29/2025 04:55:01 70.30, 103.06 72.70 2.26 39
8 09/29/2025 05:45:04 -70.20, -89.43 107.39 09/29/2025 05:44:31 -70.20, -89.47 107.40 1.64 33
9 10/01/2025 20:20:46 -70.91, 50.56 105.66 10/01/2025 20:21:55 -70.79, 52.02 105.79 55.04 69
10 10/01/2025 21:11:20 70.31,-141.15 73.75 10/01/2025 21:11:29 70.30,-141.07 73.74 3.08 9
11 10/01/2025 22:02:02 -70.18, 26.37 106.37 10/01/2025 22:00:59 -70.20, 26.41 106.36 2.30 63
12 10/04/2025 12:37:34 -70.33, 167.27 105.21 10/04/2025 12:38:32 -70.33, 167.21 105.22 2.46 58
13 10/04/2025 13:28:18 70.25, -25.29 74.72 10/04/2025 13:27:58 70.27, -25.23 74.74 2.99 20

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/22/2025
SNOs_Map_NPP_LANDSAT-9_20250923.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/22/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9