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: 11/14/2025
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 11/16/2025 04:04:24 -70.58, -64.65 90.74 11/16/2025 04:05:36 -70.54, -64.26 90.79 15.48 72
2 11/16/2025 04:55:06 70.35, 103.03 89.04 11/16/2025 04:55:05 70.33, 103.07 89.01 3.26 1
3 11/16/2025 05:45:47 -70.22, -89.45 91.09 11/16/2025 05:44:35 -70.21, -89.46 91.10 1.07 72
4 11/18/2025 20:21:15 -70.39, 51.44 90.29 11/18/2025 20:22:05 -70.37, 51.39 90.31 2.75 50
5 11/18/2025 21:11:59 70.26,-141.05 89.60 11/18/2025 21:11:32 70.27,-141.12 89.60 2.82 27
6 11/21/2025 11:47:43 71.23, -1.49 91.16 11/21/2025 11:48:50 71.09, 0.73 91.01 81.40 67
7 11/21/2025 12:38:10 -70.37, 167.26 89.71 11/21/2025 12:38:31 -70.38, 167.29 89.70 1.41 21
8 11/21/2025 13:28:54 70.24, -25.23 90.18 11/21/2025 13:27:58 70.27, -25.23 90.20 2.96 56
9 11/24/2025 04:04:23 70.44, 115.62 90.92 11/24/2025 04:05:27 70.44, 115.64 90.92 0.87 64
10 11/24/2025 04:55:04 -70.31, -76.86 89.21 11/24/2025 04:54:57 -70.33, -76.88 89.19 2.71 7
11 11/24/2025 05:45:41 69.81, 91.21 90.30 11/24/2025 05:44:30 69.89, 90.13 90.38 42.49 71
12 11/26/2025 20:21:17 70.39,-128.52 91.38 11/26/2025 20:21:52 70.39,-128.52 91.39 0.78 35
13 11/26/2025 21:11:59 -70.31, 38.92 88.69 11/26/2025 21:11:22 -70.29, 38.95 88.72 2.90 37

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 11/14/2025
SNOs_Map_NPP_LANDSAT-9_20251115.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 11/14/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9