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: 9/3/2025
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 09/05/2025 04:53:41 -70.61, -77.28 116.18 09/05/2025 04:54:52 -70.53, -76.61 116.28 26.52 71
2 09/05/2025 05:44:20 70.23, 90.63 63.45 09/05/2025 05:44:23 70.21, 90.57 63.43 2.81 3
3 09/05/2025 06:35:02 -70.14,-101.91 116.64 09/05/2025 06:33:52 -70.16,-101.88 116.62 2.28 70
4 09/07/2025 21:10:36 -70.31, 38.95 115.49 09/07/2025 21:11:26 -70.30, 38.93 115.51 1.66 50
5 09/07/2025 22:01:20 70.20,-153.56 64.41 09/07/2025 22:00:53 70.20,-153.58 64.41 0.65 27
6 09/10/2025 12:37:07 71.07, -13.85 66.29 09/10/2025 12:38:15 70.95, -11.84 66.13 73.73 68
7 09/10/2025 13:27:36 -70.28, 154.76 114.52 09/10/2025 13:27:55 -70.29, 154.80 114.51 2.22 19
8 09/10/2025 14:18:20 70.17, -37.77 65.39 09/10/2025 14:17:22 70.19, -37.70 65.41 2.72 58
9 09/13/2025 04:53:52 70.32, 103.14 66.54 09/13/2025 04:54:53 70.35, 103.14 66.56 3.28 61
10 09/13/2025 05:44:35 -70.26, -89.45 113.52 09/13/2025 05:44:23 -70.24, -89.38 113.54 3.44 12
11 09/13/2025 06:35:08 69.58, 78.89 65.80 09/13/2025 06:33:59 69.64, 77.41 65.89 57.39 69
12 09/15/2025 21:10:52 70.32,-141.10 67.56 09/15/2025 21:11:21 70.31,-141.02 67.55 3.14 29
13 09/15/2025 22:01:34 -70.20, 26.40 112.55 09/15/2025 22:00:51 -70.21, 26.46 112.55 2.27 43

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/3/2025
SNOs_Map_NPP_LANDSAT-9_20250903.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/03/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9