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: 9/18/2025
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 09/21/2025 04:54:08 -70.35, -76.94 110.36 09/21/2025 04:54:56 -70.35, -76.87 110.37 2.73 48
2 09/21/2025 05:44:51 70.20, 90.60 69.50 09/21/2025 05:44:24 70.19, 90.55 69.50 2.16 27
3 09/23/2025 20:20:37 71.03,-129.62 71.37 09/23/2025 20:21:45 70.95,-127.71 71.27 70.02 68
4 09/23/2025 21:11:06 -70.29, 38.91 109.38 09/23/2025 21:11:24 -70.29, 38.93 109.38 0.80 18
5 09/23/2025 22:01:50 70.19,-153.63 70.54 09/23/2025 22:00:51 70.19,-153.57 70.53 2.37 59
6 09/26/2025 12:37:23 70.35, -12.75 71.72 09/26/2025 12:38:23 70.32, -12.76 71.68 3.52 60
7 09/26/2025 13:28:05 -70.23, 154.76 108.40 09/26/2025 13:27:53 -70.21, 154.71 108.42 2.71 12
8 09/26/2025 14:18:38 69.56, -36.92 70.94 09/26/2025 14:17:29 69.61, -38.49 71.00 61.27 69
9 09/29/2025 04:54:22 70.31, 103.09 72.71 09/29/2025 04:54:51 70.28, 103.06 72.68 3.31 29
10 09/29/2025 05:45:04 -70.18, -89.40 107.41 09/29/2025 05:44:21 -70.17, -89.46 107.42 2.29 43
11 10/01/2025 20:20:39 -70.45, 51.31 106.12 10/01/2025 20:21:50 -70.44, 51.55 106.14 8.95 71
12 10/01/2025 21:11:21 70.27,-141.09 73.71 10/01/2025 21:11:18 70.27,-141.05 73.71 1.34 3
13 10/01/2025 22:02:02 -70.08, 26.51 106.47 10/01/2025 22:00:49 -70.11, 26.35 106.44 6.88 73

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/18/2025
SNOs_Map_NPP_LANDSAT-9_20250919.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/18/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9