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: 11/19/2025
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 11/21/2025 11:47:44 71.07, -1.23 90.99 11/21/2025 11:48:52 71.00, 0.59 90.92 66.16 68
2 11/21/2025 12:38:14 -70.37, 167.23 89.71 11/21/2025 12:38:31 -70.39, 167.30 89.69 3.21 17
3 11/21/2025 13:28:58 70.23, -25.23 90.16 11/21/2025 13:27:59 70.23, -25.28 90.16 2.22 59
4 11/24/2025 04:04:33 70.40, 115.63 90.88 11/24/2025 04:05:29 70.40, 115.58 90.88 1.89 56
5 11/24/2025 04:55:15 -70.33, -76.95 89.19 11/24/2025 04:54:58 -70.34, -76.87 89.18 2.96 17
6 11/24/2025 05:45:45 69.44, 91.70 89.94 11/24/2025 05:44:38 69.52, 89.62 90.01 81.64 67
7 11/26/2025 20:21:34 70.37,-128.56 91.36 11/26/2025 20:21:55 70.38,-128.56 91.37 1.38 21
8 11/26/2025 21:12:15 -70.25, 38.95 88.76 11/26/2025 21:11:25 -70.27, 38.91 88.74 2.82 50
9 11/29/2025 11:47:50 -70.43, 179.78 88.11 11/29/2025 11:48:54 -70.45, 179.79 88.10 1.37 64
10 11/29/2025 12:38:35 70.34, -12.77 91.81 11/29/2025 12:38:21 70.33, -12.73 91.79 1.69 14
11 11/29/2025 13:29:08 -69.80, 155.39 88.74 11/29/2025 13:27:57 -69.90, 154.28 88.64 43.82 71
12 12/02/2025 04:04:49 -70.36, -64.34 87.77 12/02/2025 04:05:19 -70.38, -64.42 87.75 3.18 30
13 12/02/2025 04:55:34 70.27, 103.10 92.15 12/02/2025 04:54:46 70.26, 103.06 92.14 1.93 48

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 11/19/2025
SNOs_Map_NPP_LANDSAT-9_20251120.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 11/19/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9