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: 6/28/2025
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 06/30/2025 13:26:50 70.25, -25.25 47.09 06/30/2025 13:27:25 70.23, -25.26 47.06 2.14 35
2 06/30/2025 14:17:31 -70.11, 142.29 133.06 06/30/2025 14:16:55 -70.12, 142.21 133.04 3.24 36
3 07/03/2025 04:53:11 -70.83, -77.72 132.10 07/03/2025 04:54:20 -70.76, -76.25 132.24 54.59 69
4 07/03/2025 05:43:45 70.19, 90.62 47.23 07/03/2025 05:43:55 70.21, 90.59 47.25 2.45 10
5 07/03/2025 06:34:27 -70.10,-101.93 132.87 07/03/2025 06:33:25 -70.11,-101.93 132.86 0.26 62
6 07/05/2025 21:09:56 -70.31, 38.90 132.41 07/05/2025 21:10:57 -70.29, 38.94 132.44 2.51 61
7 07/05/2025 22:00:40 70.19,-153.61 47.48 07/05/2025 22:00:24 70.18,-153.57 47.46 1.80 16
8 07/05/2025 22:51:12 -69.58, 14.64 133.17 07/05/2025 22:50:02 -69.64, 13.30 133.05 52.26 70
9 07/08/2025 13:26:51 -70.26, 154.75 132.16 07/08/2025 13:27:27 -70.25, 154.77 132.18 1.29 36
10 07/08/2025 14:17:35 70.14, -37.75 47.72 07/08/2025 14:16:54 70.14, -37.75 47.72 0.77 41
11 07/11/2025 04:53:11 70.67, 102.56 48.61 07/11/2025 04:54:22 70.57, 103.49 48.46 36.27 71
12 07/11/2025 05:43:46 -70.22, -89.40 131.87 07/11/2025 05:43:57 -70.20, -89.43 131.90 2.67 11
13 07/11/2025 06:34:30 70.10, 78.09 48.01 07/11/2025 06:33:24 70.08, 78.05 48.00 2.83 66

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 6/28/2025
SNOs_Map_NPP_LANDSAT-9_20250628.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 06/28/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9