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: 9/21/2025
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 20:20:41 71.25,-130.00 71.60 09/23/2025 20:21:47 71.12,-127.46 71.44 92.28 66
2 09/23/2025 21:11:07 -70.30, 38.89 109.37 09/23/2025 21:11:30 -70.30, 38.92 109.37 1.19 23
3 09/23/2025 22:01:51 70.20,-153.65 70.55 09/23/2025 22:00:57 70.20,-153.58 70.55 2.71 54
4 09/26/2025 12:37:23 70.37, -12.77 71.73 09/26/2025 12:38:30 70.36, -12.74 71.72 1.54 67
5 09/26/2025 13:28:05 -70.25, 154.73 108.38 09/26/2025 13:28:00 -70.25, 154.73 108.38 0.07 5
6 09/26/2025 14:18:43 69.84, -37.33 71.23 09/26/2025 14:17:31 69.93, -38.08 71.32 30.35 72
7 09/29/2025 04:54:22 70.33, 103.05 72.74 09/29/2025 04:55:00 70.34, 103.10 72.74 2.09 38
8 09/29/2025 05:45:04 -70.21, -89.44 107.38 09/29/2025 05:44:30 -70.23, -89.42 107.36 2.57 34
9 10/01/2025 20:20:46 -70.86, 50.65 105.72 10/01/2025 20:21:56 -70.78, 52.00 105.80 49.90 70
10 10/01/2025 21:11:21 70.30,-141.14 73.74 10/01/2025 21:11:30 70.29,-141.09 73.72 2.65 9
11 10/01/2025 22:02:03 -70.17, 26.37 106.38 10/01/2025 22:01:00 -70.18, 26.39 106.37 1.09 63
12 10/04/2025 12:37:36 -70.36, 167.22 105.18 10/04/2025 12:38:32 -70.38, 167.28 105.17 2.83 56
13 10/04/2025 13:28:19 70.23, -25.26 74.70 10/04/2025 13:28:00 70.21, -25.32 74.68 3.12 19

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/21/2025
SNOs_Map_NPP_LANDSAT-9_20250922.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/21/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9