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: 11/13/2025
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 -70.59, -64.66 90.74 11/16/2025 04:05:36 -70.54, -64.26 90.79 15.89 72
2 11/16/2025 04:55:05 70.30, 103.10 88.99 11/16/2025 04:55:05 70.32, 103.07 89.01 2.30 0
3 11/16/2025 05:45:47 -70.23, -89.46 91.08 11/16/2025 05:44:35 -70.21, -89.46 91.10 1.97 72
4 11/18/2025 20:21:15 -70.40, 51.42 90.28 11/18/2025 20:22:04 -70.42, 51.45 90.27 1.68 49
5 11/18/2025 21:11:59 70.28,-141.07 89.61 11/18/2025 21:11:31 70.31,-141.06 89.64 3.37 28
6 11/21/2025 11:47:42 71.20, -1.44 91.13 11/21/2025 11:48:49 71.11, 0.78 91.04 80.16 67
7 11/21/2025 12:38:09 -70.34, 167.31 89.74 11/21/2025 12:38:31 -70.35, 167.25 89.73 2.40 22
8 11/21/2025 13:28:54 70.26, -25.27 90.20 11/21/2025 13:27:58 70.24, -25.27 90.17 3.04 56
9 11/24/2025 04:04:22 70.42, 115.64 90.90 11/24/2025 04:05:26 70.44, 115.65 90.92 2.60 64
10 11/24/2025 04:55:04 -70.34, -76.92 89.17 11/24/2025 04:54:56 -70.34, -76.87 89.18 1.90 8
11 11/24/2025 05:45:40 69.79, 91.24 90.29 11/24/2025 05:44:30 69.84, 90.06 90.33 45.30 70
12 11/26/2025 20:21:16 70.39,-128.52 91.39 11/26/2025 20:21:51 70.38,-128.54 91.37 1.70 35
13 11/26/2025 21:11:57 -70.26, 39.00 88.74 11/26/2025 21:11:21 -70.27, 38.94 88.73 2.72 36

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 11/13/2025
SNOs_Map_NPP_LANDSAT-9_20251114.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 11/13/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9