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: 10/3/2025
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, 167.26 105.20 10/04/2025 12:38:32 -70.33, 167.21 105.22 2.24 58
2 10/04/2025 13:28:18 70.25, -25.29 74.72 10/04/2025 13:27:59 70.23, -25.29 74.70 2.47 19
3 10/04/2025 14:18:48 -69.50, 143.16 106.02 10/04/2025 14:17:39 -69.57, 141.42 105.95 67.94 69
4 10/07/2025 04:54:32 -70.30, -76.91 104.22 10/07/2025 04:55:03 -70.33, -76.92 104.19 2.72 31
5 10/07/2025 05:45:16 70.21, 90.54 75.71 10/07/2025 05:44:30 70.22, 90.58 75.72 1.78 46
6 10/09/2025 20:20:51 70.56,-128.87 77.05 10/09/2025 20:22:02 70.48,-128.44 76.98 18.02 71
7 10/09/2025 21:11:30 -70.28, 38.89 103.22 10/09/2025 21:11:34 -70.27, 38.88 103.23 1.25 4
8 10/09/2025 22:02:13 70.14,-153.58 76.66 10/09/2025 22:01:01 70.16,-153.63 76.68 3.04 72
9 10/12/2025 12:37:44 70.34, -12.76 77.84 10/12/2025 12:38:32 70.37, -12.73 77.87 2.94 48
10 10/12/2025 13:28:27 -70.27, 154.67 102.22 10/12/2025 13:28:02 -70.26, 154.75 102.23 3.06 25
11 10/15/2025 04:04:14 -71.26, -65.83 100.25 10/15/2025 04:05:20 -71.18, -63.25 100.33 92.97 66
12 10/15/2025 04:54:41 70.30, 103.08 78.80 10/15/2025 04:55:01 70.30, 103.07 78.80 0.95 20
13 10/15/2025 05:45:24 -70.22, -89.49 101.27 10/15/2025 05:44:31 -70.20, -89.45 101.30 3.03 53

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/3/2025
SNOs_Map_NPP_LANDSAT-9_20251004.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/03/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9