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: 6/16/2025
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, -77.70 132.61 06/17/2025 04:54:14 -70.67, -76.38 132.79 50.57 70
2 06/17/2025 05:43:38 70.18, 90.61 46.74 06/17/2025 05:43:48 70.19, 90.56 46.75 2.46 10
3 06/17/2025 06:34:20 -70.07,-101.91 133.38 06/17/2025 06:33:18 -70.08,-101.97 133.36 2.46 62
4 06/19/2025 21:09:51 -70.31, 38.88 133.18 06/19/2025 21:10:52 -70.29, 38.93 133.20 2.76 61
5 06/19/2025 22:00:34 70.15,-153.58 46.67 06/19/2025 22:00:20 70.13,-153.65 46.65 3.72 14
6 06/19/2025 22:51:07 -69.57, 14.61 133.94 06/19/2025 22:49:57 -69.64, 13.29 133.83 51.76 70
7 06/22/2025 13:26:45 -70.24, 154.76 133.24 06/22/2025 13:27:23 -70.22, 154.70 133.27 3.06 38
8 06/22/2025 14:17:29 70.13, -37.77 46.65 06/22/2025 14:16:50 70.11, -37.81 46.63 3.03 39
9 06/25/2025 04:53:07 70.75, 102.40 47.35 06/25/2025 04:54:17 70.67, 103.61 47.22 45.42 70
10 06/25/2025 05:43:41 -70.22, -89.44 133.20 06/25/2025 05:43:53 -70.23, -89.39 133.20 2.25 12
11 06/25/2025 06:34:25 70.12, 78.03 46.70 06/25/2025 06:33:20 70.12, 78.09 46.70 2.54 65
12 06/27/2025 21:09:54 70.27,-141.05 46.95 06/27/2025 21:10:54 70.28,-141.08 46.95 1.73 60
13 06/27/2025 22:00:36 -70.16, 26.43 133.16 06/27/2025 22:00:24 -70.18, 26.41 133.14 2.02 12
14 06/27/2025 22:51:09 69.48,-165.24 46.13 06/27/2025 22:50:00 69.57,-166.80 46.28 61.67 69

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 6/16/2025
SNOs_Map_NPP_LANDSAT-9_20250616.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 06/16/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9