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: 9/14/2025
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 09/15/2025 21:10:53 70.32,-141.11 67.56 09/15/2025 21:11:25 70.32,-141.04 67.55 2.71 32
2 09/15/2025 22:01:35 -70.22, 26.37 112.54 09/15/2025 22:00:55 -70.20, 26.43 112.55 2.64 40
3 09/18/2025 12:37:13 -70.61, 166.87 111.13 09/18/2025 12:38:25 -70.51, 167.49 111.24 25.49 72
4 09/18/2025 13:27:52 70.25, -25.24 68.52 09/18/2025 13:27:55 70.24, -25.26 68.51 1.15 3
5 09/18/2025 14:18:34 -70.14, 142.25 111.58 09/18/2025 14:17:25 -70.13, 142.21 111.59 1.71 69
6 09/21/2025 04:54:08 -70.34, -76.92 110.37 09/21/2025 04:54:57 -70.32, -76.91 110.40 2.09 49
7 09/21/2025 05:44:51 70.19, 90.62 69.50 09/21/2025 05:44:24 70.21, 90.58 69.52 2.85 27
8 09/23/2025 20:20:37 71.08,-129.70 71.42 09/23/2025 20:21:44 70.98,-127.66 71.30 74.45 67
9 09/23/2025 21:11:06 -70.27, 38.94 109.40 09/23/2025 21:11:25 -70.27, 38.91 109.40 1.02 19
10 09/23/2025 22:01:50 70.18,-153.61 70.53 09/23/2025 22:00:52 70.16,-153.60 70.51 2.27 58
11 09/26/2025 12:37:23 70.34, -12.73 71.71 09/26/2025 12:38:24 70.32, -12.77 71.68 3.25 61
12 09/26/2025 13:28:05 -70.22, 154.79 108.42 09/26/2025 13:27:54 -70.21, 154.71 108.42 2.92 11
13 09/26/2025 14:18:39 69.60, -36.98 70.98 09/26/2025 14:17:29 69.66, -38.42 71.05 56.36 70

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/14/2025
SNOs_Map_NPP_LANDSAT-9_20250915.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/14/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9