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: 4/9/2025
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 04/11/2025 14:16:15 -70.21, 142.23 118.40 04/11/2025 14:17:04 -70.21, 142.21 118.41 0.52 49
2 04/11/2025 15:07:00 70.12, -50.33 61.50 04/11/2025 15:06:31 70.10, -50.29 61.48 2.13 29
3 04/14/2025 05:42:46 70.95, 89.46 61.41 04/14/2025 05:43:54 70.80, 91.34 61.21 70.17 68
4 04/14/2025 06:33:14 -70.19,-101.99 119.39 04/14/2025 06:33:32 -70.20,-101.92 119.39 3.06 18
5 04/14/2025 07:23:58 70.05, 65.53 60.46 04/14/2025 07:23:00 70.04, 65.49 60.44 2.13 58
6 04/16/2025 21:59:32 70.27,-153.68 59.75 04/16/2025 22:00:31 70.26,-153.59 59.73 3.39 59
7 04/16/2025 22:50:13 -70.14, 13.85 120.41 04/16/2025 22:50:01 -70.15, 13.89 120.39 2.27 12
8 04/16/2025 23:40:47 69.47,-177.86 58.90 04/16/2025 23:39:37 69.54,-179.31 59.01 57.17 70
9 04/19/2025 14:16:30 70.18, -37.78 58.72 04/19/2025 14:16:59 70.21, -37.77 58.75 3.58 29
10 04/19/2025 15:07:12 -70.09, 129.67 121.39 04/19/2025 15:06:29 -70.11, 129.71 121.37 2.29 43
11 04/22/2025 05:42:47 -70.38, -89.64 121.98 04/22/2025 05:43:58 -70.35, -89.34 122.02 11.86 71
12 04/22/2025 06:33:29 70.16, 78.02 57.78 04/22/2025 06:33:26 70.18, 78.06 57.80 2.88 3
13 04/22/2025 07:24:10 -70.01,-114.44 122.38 04/22/2025 07:22:57 -70.02,-114.53 122.37 3.40 73

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/9/2025
SNOs_Map_NPP_LANDSAT-9_20250409.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 04/09/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9