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: 10/2/2025
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 10/04/2025 12:37:34 -70.34, 167.26 105.20 10/04/2025 12:38:28 -70.35, 167.26 105.19 1.70 54
2 10/04/2025 13:28:18 70.25, -25.29 74.72 10/04/2025 13:27:55 70.25, -25.24 74.72 1.75 23
3 10/04/2025 14:18:46 -69.39, 143.31 106.13 10/04/2025 14:17:38 -69.42, 141.24 106.09 81.15 68
4 10/07/2025 04:04:06 71.26, 114.19 76.74 10/07/2025 04:05:12 71.11, 116.68 76.59 90.79 66
5 10/07/2025 04:54:32 -70.30, -76.91 104.22 10/07/2025 04:54:55 -70.29, -76.94 104.23 1.37 23
6 10/07/2025 05:45:16 70.21, 90.54 75.71 10/07/2025 05:44:22 70.18, 90.55 75.68 3.12 54
7 10/09/2025 20:20:48 70.40,-128.61 76.89 10/09/2025 20:21:50 70.39,-128.53 76.88 3.28 62
8 10/09/2025 21:11:30 -70.27, 38.90 103.23 10/09/2025 21:11:20 -70.28, 38.94 103.22 1.72 10
9 10/09/2025 22:02:05 69.71,-152.94 76.23 10/09/2025 22:00:55 69.72,-154.19 76.24 48.44 70
10 10/12/2025 12:37:44 70.33, -12.75 77.84 10/12/2025 12:38:14 70.31, -12.74 77.81 2.62 30
11 10/12/2025 13:28:26 -70.21, 154.77 102.28 10/12/2025 13:27:44 -70.20, 154.74 102.29 1.13 42
12 10/15/2025 04:03:58 -70.42, -64.42 101.10 10/15/2025 04:05:10 -70.40, -64.34 101.12 3.69 72
13 10/15/2025 04:54:41 70.29, 103.10 78.79 10/15/2025 04:54:37 70.29, 103.14 78.78 1.43 4
14 10/15/2025 05:45:21 -70.05, -89.23 101.44 10/15/2025 05:44:08 -70.13, -89.46 101.37 11.91 73

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/2/2025
SNOs_Map_NPP_LANDSAT-9_20251003.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/02/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9