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: 4/8/2025
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 04/08/2025 21:59:19 -70.46, 26.07 117.14 04/08/2025 22:00:31 -70.38, 26.59 117.25 21.70 72
2 04/08/2025 22:50:00 70.16,-166.15 62.53 04/08/2025 22:50:00 70.17,-166.07 62.54 2.98 0
3 04/08/2025 23:40:41 -70.04, 1.35 117.61 04/08/2025 23:39:30 -70.05, 1.40 117.59 2.53 71
4 04/11/2025 14:16:15 -70.22, 142.20 118.38 04/11/2025 14:17:05 -70.20, 142.19 118.42 3.08 50
5 04/11/2025 15:06:59 70.08, -50.28 61.46 04/11/2025 15:06:32 70.09, -50.31 61.47 1.61 27
6 04/11/2025 15:57:24 -69.11, 118.46 119.56 04/11/2025 15:56:17 -69.16, 116.06 119.44 95.37 67
7 04/14/2025 05:42:47 71.02, 89.34 61.49 04/14/2025 05:43:54 70.94, 91.53 61.35 79.88 67
8 04/14/2025 06:33:14 -70.16,-101.94 119.43 04/14/2025 06:33:36 -70.18,-101.97 119.41 2.58 22
9 04/14/2025 07:23:59 70.07, 65.50 60.48 04/14/2025 07:23:03 70.07, 65.52 60.47 1.12 56
10 04/16/2025 21:59:32 70.23,-153.62 59.71 04/16/2025 22:00:37 70.25,-153.62 59.72 2.16 65
11 04/16/2025 22:50:14 -70.15, 13.83 120.39 04/16/2025 22:50:07 -70.15, 13.87 120.39 1.54 7
12 04/16/2025 23:40:51 69.65,-178.11 59.08 04/16/2025 23:39:40 69.71,-179.11 59.17 38.95 71
13 04/19/2025 14:16:30 70.20, -37.80 58.74 04/19/2025 14:17:07 70.22, -37.80 58.76 2.83 37
14 04/19/2025 15:07:12 -70.11, 129.65 121.37 04/19/2025 15:06:37 -70.12, 129.69 121.36 2.25 35

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/8/2025
SNOs_Map_NPP_LANDSAT-9_20250408.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 04/08/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9