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: 10/28/2025
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 -70.58, -64.69 95.36 10/31/2025 04:05:28 -70.49, -64.29 95.44 17.73 72
2 10/31/2025 04:54:57 70.32, 103.05 84.40 10/31/2025 04:54:56 70.33, 103.12 84.41 3.13 1
3 10/31/2025 05:45:39 -70.22, -89.48 95.70 10/31/2025 05:44:26 -70.22, -89.41 95.70 2.60 73
4 11/02/2025 20:21:09 -70.37, 51.43 94.71 11/02/2025 20:21:56 -70.35, 51.40 94.73 2.50 47
5 11/02/2025 21:11:53 70.26,-141.09 85.20 11/02/2025 21:11:23 70.24,-141.11 85.17 2.53 30
6 11/05/2025 11:47:34 71.00, -1.15 86.74 11/05/2025 11:48:43 70.89, 0.47 86.63 60.32 69
7 11/05/2025 12:38:05 -70.33, 167.27 93.93 11/05/2025 12:38:21 -70.34, 167.29 93.92 1.70 16
8 11/05/2025 13:28:49 70.22, -25.25 85.97 11/05/2025 13:27:48 70.23, -25.23 85.98 1.38 61
9 11/08/2025 04:04:18 70.39, 115.63 86.92 11/08/2025 04:05:15 70.41, 115.65 86.93 2.08 57
10 11/08/2025 04:55:00 -70.30, -76.90 93.17 11/08/2025 04:54:45 -70.30, -76.87 93.17 1.40 15
11 11/08/2025 05:45:31 69.50, 91.61 86.05 11/08/2025 05:44:23 69.58, 89.76 86.12 72.57 68
12 11/10/2025 20:21:14 70.37,-128.55 87.65 11/10/2025 20:21:40 70.34,-128.55 87.62 3.59 26
13 11/10/2025 21:11:55 -70.22, 39.00 92.49 11/10/2025 21:11:10 -70.23, 38.93 92.48 2.84 45

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/28/2025
SNOs_Map_NPP_LANDSAT-9_20251029.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/28/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9