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: 5/2/2025
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 05/02/2025 21:59:55 70.19,-153.61 54.45 05/02/2025 22:00:24 70.20,-153.67 54.46 2.78 29
2 05/02/2025 22:50:37 -70.10, 13.85 125.66 05/02/2025 22:49:54 -70.09, 13.80 125.67 2.23 43
3 05/05/2025 13:26:11 -70.43, 154.46 126.07 05/05/2025 13:27:22 -70.40, 154.84 126.12 14.58 71
4 05/05/2025 14:16:52 70.17, -37.81 53.65 05/05/2025 14:16:51 70.18, -37.82 53.67 1.99 1
5 05/05/2025 15:07:34 -70.06, 129.66 126.47 05/05/2025 15:06:21 -70.07, 129.65 126.46 0.77 73
6 05/08/2025 05:43:06 -70.25, -89.49 126.99 05/08/2025 05:43:52 -70.23, -89.51 127.02 2.51 46
7 05/08/2025 06:33:50 70.15, 77.98 52.90 05/08/2025 06:33:19 70.13, 77.98 52.87 3.07 31
8 05/10/2025 21:09:32 70.88,-142.06 52.97 05/10/2025 21:10:41 70.74,-140.51 52.79 58.83 69
9 05/10/2025 22:00:03 -70.19, 26.37 127.76 05/10/2025 22:00:19 -70.20, 26.32 127.76 2.01 16
10 05/10/2025 22:50:47 70.10,-166.17 52.13 05/10/2025 22:49:46 70.08,-166.19 52.13 1.70 61
11 05/13/2025 13:26:18 70.26, -25.29 51.65 05/13/2025 13:27:15 70.28, -25.30 51.67 2.30 57
12 05/13/2025 14:17:01 -70.20, 142.13 128.43 05/13/2025 14:16:45 -70.18, 142.18 128.45 2.72 16
13 05/13/2025 15:07:31 69.36, -49.32 50.71 05/13/2025 15:06:23 69.46, -51.17 50.84 73.31 68

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 5/2/2025
SNOs_Map_NPP_LANDSAT-9_20250502.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 05/02/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9