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: 9/20/2025
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 09/21/2025 04:54:07 -70.33, -76.91 110.38 09/21/2025 04:54:58 -70.35, -76.88 110.36 2.85 51
2 09/21/2025 05:44:51 70.23, 90.55 69.54 09/21/2025 05:44:26 70.20, 90.55 69.50 3.34 25
3 09/21/2025 06:35:17 -69.27,-100.71 111.42 09/21/2025 06:34:10 -69.32,-103.04 111.36 91.72 67
4 09/23/2025 20:20:40 71.22,-129.95 71.57 09/23/2025 20:21:46 71.16,-127.40 71.48 91.70 66
5 09/23/2025 21:11:06 -70.27, 38.94 109.40 09/23/2025 21:11:30 -70.29, 38.90 109.39 2.30 24
6 09/23/2025 22:01:50 70.17,-153.60 70.52 09/23/2025 22:00:57 70.18,-153.60 70.53 1.04 53
7 09/26/2025 12:37:23 70.34, -12.72 71.70 09/26/2025 12:38:31 70.36, -12.74 71.72 2.69 68
8 09/26/2025 13:28:06 -70.27, 154.70 108.36 09/26/2025 13:28:01 -70.25, 154.73 108.38 2.10 5
9 09/26/2025 14:18:44 69.86, -37.36 71.25 09/26/2025 14:17:32 69.93, -38.09 71.32 28.64 72
10 09/29/2025 04:54:22 70.30, 103.11 72.70 09/29/2025 04:55:02 70.30, 103.05 72.70 2.23 40
11 09/29/2025 05:45:05 -70.22, -89.46 107.37 09/29/2025 05:44:32 -70.20, -89.47 107.39 2.61 33
12 10/01/2025 20:20:47 -70.92, 50.55 105.65 10/01/2025 20:21:56 -70.83, 52.07 105.75 56.33 69
13 10/01/2025 21:11:20 70.26,-141.08 73.70 10/01/2025 21:11:31 70.28,-141.10 73.72 2.54 11
14 10/01/2025 22:02:03 -70.18, 26.36 106.37 10/01/2025 22:01:01 -70.18, 26.39 106.37 1.10 62

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/20/2025
SNOs_Map_NPP_LANDSAT-9_20250920.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/20/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9