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: 6/15/2025
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 06/17/2025 04:53:04 -70.80, -77.69 132.62 06/17/2025 04:54:14 -70.68, -76.37 132.78 50.12 70
2 06/17/2025 05:43:39 70.23, 90.54 46.79 06/17/2025 05:43:48 70.20, 90.56 46.75 3.31 9
3 06/17/2025 06:34:20 -70.07,-101.90 133.38 06/17/2025 06:33:18 -70.09,-101.96 133.36 3.23 62
4 06/19/2025 21:09:51 -70.30, 38.89 133.18 06/19/2025 21:10:52 -70.30, 38.94 133.20 1.89 61
5 06/19/2025 22:00:35 70.20,-153.65 46.72 06/19/2025 22:00:19 70.19,-153.56 46.71 3.12 16
6 06/19/2025 22:51:07 -69.56, 14.63 133.95 06/19/2025 22:49:57 -69.65, 13.30 133.82 52.17 70
7 06/22/2025 13:26:45 -70.22, 154.78 133.26 06/22/2025 13:27:23 -70.22, 154.71 133.26 2.68 38
8 06/22/2025 14:17:29 70.12, -37.75 46.64 06/22/2025 14:16:50 70.11, -37.80 46.64 2.02 39
9 06/25/2025 04:53:08 70.79, 102.34 47.39 06/25/2025 04:54:17 70.67, 103.62 47.22 48.75 69
10 06/25/2025 05:43:41 -70.21, -89.42 133.22 06/25/2025 05:43:54 -70.18, -89.47 133.24 3.24 13
11 06/25/2025 06:34:25 70.11, 78.05 46.68 06/25/2025 06:33:20 70.13, 78.10 46.71 2.87 65
12 06/27/2025 21:09:55 70.30,-141.10 46.99 06/27/2025 21:10:54 70.28,-141.08 46.95 2.64 59
13 06/27/2025 22:00:37 -70.19, 26.38 133.13 06/27/2025 22:00:24 -70.18, 26.41 133.14 2.09 13
14 06/27/2025 22:51:10 69.51,-165.29 46.17 06/27/2025 22:50:00 69.57,-166.80 46.28 59.14 70

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 6/15/2025
SNOs_Map_NPP_LANDSAT-9_20250615.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 06/15/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9