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: 10/2/2025
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 10/04/2025 12:37:34 -70.34, 167.26 105.21 10/04/2025 12:38:28 -70.36, 167.27 105.19 2.48 54
2 10/04/2025 13:28:18 70.25, -25.29 74.72 10/04/2025 13:27:55 70.26, -25.24 74.73 2.21 23
3 10/04/2025 14:18:46 -69.39, 143.31 106.13 10/04/2025 14:17:38 -69.43, 141.25 106.09 80.94 68
4 10/07/2025 04:04:06 71.26, 114.19 76.74 10/07/2025 04:05:12 71.13, 116.70 76.61 91.31 66
5 10/07/2025 04:54:32 -70.30, -76.91 104.22 10/07/2025 04:54:55 -70.31, -76.92 104.21 0.83 23
6 10/07/2025 05:45:16 70.21, 90.54 75.71 10/07/2025 05:44:22 70.20, 90.57 75.70 2.01 54
7 10/09/2025 20:20:47 70.35,-128.53 76.84 10/09/2025 20:21:51 70.36,-128.57 76.85 2.18 64
8 10/09/2025 21:11:30 -70.27, 38.90 103.23 10/09/2025 21:11:21 -70.25, 38.90 103.25 2.54 9
9 10/09/2025 22:02:05 69.71,-152.94 76.23 10/09/2025 22:00:55 69.75,-154.15 76.27 47.02 70
10 10/12/2025 12:37:43 70.28, -12.67 77.79 10/12/2025 12:38:15 70.30, -12.75 77.80 3.69 32
11 10/12/2025 13:28:26 -70.21, 154.76 102.28 10/12/2025 13:27:45 -70.20, 154.73 102.30 2.14 41
12 10/15/2025 04:03:59 -70.48, -64.51 101.04 10/15/2025 04:05:11 -70.42, -64.32 101.10 9.70 72
13 10/15/2025 04:54:41 70.29, 103.09 78.79 10/15/2025 04:54:38 70.30, 103.15 78.80 2.60 3
14 10/15/2025 05:45:22 -70.11, -89.31 101.38 10/15/2025 05:44:09 -70.14, -89.44 101.36 5.89 73

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/2/2025
SNOs_Map_NPP_LANDSAT-9_20251002.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/02/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9