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: 10/12/2025
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 10/15/2025 04:54:43 70.32, 103.04 78.82 10/15/2025 04:55:06 70.32, 103.06 78.82 1.12 23
2 10/15/2025 05:45:25 -70.21, -89.47 101.29 10/15/2025 05:44:36 -70.21, -89.46 101.28 0.75 49
3 10/17/2025 20:20:57 -70.41, 51.36 100.13 10/17/2025 20:22:09 -70.39, 51.40 100.15 2.68 72
4 10/17/2025 21:11:40 70.27,-141.10 79.75 10/17/2025 21:11:36 70.28,-141.12 79.76 1.81 4
5 10/17/2025 22:02:19 -70.04, 26.56 100.47 10/17/2025 22:01:06 -70.12, 26.29 100.39 13.32 73
6 10/20/2025 12:37:53 -70.36, 167.21 99.21 10/20/2025 12:38:37 -70.37, 167.26 99.20 2.51 44
7 10/20/2025 13:28:37 70.27, -25.34 80.72 10/20/2025 13:28:04 70.26, -25.26 80.71 3.07 33
8 10/23/2025 04:04:19 71.01, 114.59 82.39 10/23/2025 04:05:27 70.92, 116.34 82.30 64.16 68
9 10/23/2025 04:54:50 -70.32, -76.96 98.30 10/23/2025 04:55:06 -70.33, -76.92 98.29 1.81 16
10 10/23/2025 05:45:34 70.23, 90.50 81.62 10/23/2025 05:44:33 70.22, 90.56 81.61 2.78 61
11 10/25/2025 20:21:04 70.35,-128.55 82.65 10/25/2025 20:22:05 70.36,-128.63 82.65 2.82 61
12 10/25/2025 21:11:47 -70.29, 38.86 97.41 10/25/2025 21:11:35 -70.26, 38.86 97.44 3.65 12
13 10/25/2025 22:02:20 69.62,-152.81 81.94 10/25/2025 22:01:11 69.64,-154.36 81.96 60.19 69

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/12/2025
SNOs_Map_NPP_LANDSAT-9_20251013.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/12/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9