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: 10/10/2025
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 10/12/2025 12:37:45 70.36, -12.79 77.86 10/12/2025 12:38:35 70.37, -12.74 77.87 2.05 50
2 10/12/2025 13:28:27 -70.24, 154.71 102.25 10/12/2025 13:28:05 -70.26, 154.73 102.23 2.14 22
3 10/12/2025 14:18:54 69.25, -36.50 76.78 10/12/2025 14:17:48 69.27, -38.99 76.80 97.92 66
4 10/15/2025 04:54:42 70.29, 103.09 78.79 10/15/2025 04:55:06 70.31, 103.04 78.81 2.72 24
5 10/15/2025 05:45:25 -70.22, -89.49 101.27 10/15/2025 05:44:36 -70.20, -89.48 101.29 2.35 49
6 10/17/2025 20:20:57 -70.42, 51.34 100.12 10/17/2025 20:22:09 -70.39, 51.39 100.15 4.25 72
7 10/17/2025 21:11:40 70.28,-141.12 79.76 10/17/2025 21:11:36 70.27,-141.13 79.75 0.48 4
8 10/17/2025 22:02:20 -70.05, 26.54 100.46 10/17/2025 22:01:07 -70.12, 26.28 100.40 12.06 73
9 10/20/2025 12:37:54 -70.36, 167.20 99.21 10/20/2025 12:38:38 -70.38, 167.27 99.19 3.18 44
10 10/20/2025 13:28:37 70.22, -25.27 80.67 10/20/2025 13:28:06 70.21, -25.33 80.66 2.72 31
11 10/23/2025 04:04:19 71.01, 114.59 82.38 10/23/2025 04:05:27 70.94, 116.36 82.32 64.65 68
12 10/23/2025 04:54:50 -70.31, -76.95 98.31 10/23/2025 04:55:07 -70.29, -76.97 98.33 2.36 17
13 10/23/2025 05:45:33 70.17, 90.58 81.57 10/23/2025 05:44:34 70.18, 90.50 81.57 2.96 59

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/10/2025
SNOs_Map_NPP_LANDSAT-9_20251010.jpg

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

Historial Predications of SNOs between NPP and LANDSAT-9