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: 10/29/2025
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 10/31/2025 04:04:16 -70.59, -64.70 95.35 10/31/2025 04:05:27 -70.54, -64.22 95.39 18.51 71
2 10/31/2025 04:54:57 70.32, 103.04 84.40 10/31/2025 04:54:56 70.33, 103.12 84.41 3.01 1
3 10/31/2025 05:45:39 -70.22, -89.49 95.69 10/31/2025 05:44:26 -70.22, -89.42 95.70 2.98 73
4 11/02/2025 20:21:09 -70.38, 51.42 94.71 11/02/2025 20:21:56 -70.35, 51.40 94.73 2.78 47
5 11/02/2025 21:11:53 70.27,-141.10 85.20 11/02/2025 21:11:23 70.25,-141.11 85.17 2.53 30
6 11/05/2025 11:47:34 71.01, -1.16 86.74 11/05/2025 11:48:43 70.90, 0.49 86.64 60.82 69
7 11/05/2025 12:38:05 -70.33, 167.26 93.93 11/05/2025 12:38:21 -70.35, 167.30 93.91 2.48 16
8 11/05/2025 13:28:49 70.22, -25.25 85.98 11/05/2025 13:27:48 70.24, -25.22 85.99 2.46 61
9 11/08/2025 04:04:19 70.39, 115.63 86.92 11/08/2025 04:05:17 70.38, 115.60 86.90 2.43 58
10 11/08/2025 04:55:00 -70.30, -76.90 93.17 11/08/2025 04:54:45 -70.32, -76.85 93.15 3.40 15
11 11/08/2025 05:45:32 69.55, 91.53 86.10 11/08/2025 05:44:23 69.60, 89.79 86.14 68.06 69
12 11/10/2025 20:21:14 70.37,-128.55 87.65 11/10/2025 20:21:40 70.37,-128.51 87.65 1.57 26
13 11/10/2025 21:11:56 -70.27, 38.91 92.44 11/10/2025 21:11:10 -70.26, 38.97 92.45 2.40 46

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/29/2025
SNOs_Map_NPP_LANDSAT-9_20251030.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/29/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9