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: 10/18/2025
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 10/20/2025 12:37:53 -70.37, 167.20 99.20 10/20/2025 12:38:37 -70.36, 167.24 99.21 1.69 44
2 10/20/2025 13:28:37 70.27, -25.34 80.72 10/20/2025 13:28:04 70.26, -25.27 80.70 3.02 33
3 10/23/2025 04:04:19 71.02, 114.59 82.39 10/23/2025 04:05:27 70.90, 116.31 82.28 63.77 68
4 10/23/2025 04:54:50 -70.33, -76.97 98.29 10/23/2025 04:55:06 -70.30, -76.96 98.32 3.00 16
5 10/23/2025 05:45:33 70.18, 90.57 81.57 10/23/2025 05:44:33 70.20, 90.53 81.59 2.36 60
6 10/25/2025 20:21:04 70.36,-128.57 82.66 10/25/2025 20:22:04 70.37,-128.60 82.67 1.83 60
7 10/25/2025 21:11:46 -70.25, 38.92 97.45 10/25/2025 21:11:34 -70.27, 38.88 97.43 2.51 12
8 10/25/2025 22:02:19 69.57,-152.74 81.90 10/25/2025 22:01:10 69.66,-154.33 81.97 62.54 69
9 10/28/2025 12:38:01 70.35, -12.77 83.55 10/28/2025 12:38:31 70.35, -12.74 83.55 1.39 30
10 10/28/2025 13:28:43 -70.24, 154.72 96.56 10/28/2025 13:28:01 -70.25, 154.74 96.55 1.79 42
11 10/31/2025 04:04:16 -70.59, -64.70 95.34 10/31/2025 04:05:28 -70.53, -64.24 95.41 18.77 72
12 10/31/2025 04:54:56 70.29, 103.10 84.37 10/31/2025 04:54:57 70.30, 103.08 84.38 1.65 1
13 10/31/2025 05:45:38 -70.18, -89.41 95.74 10/31/2025 05:44:27 -70.20, -89.44 95.72 2.43 71

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/18/2025
SNOs_Map_NPP_LANDSAT-9_20251019.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/18/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9