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: 5/25/2025
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 05/26/2025 21:09:36 70.28,-141.10 48.92 05/26/2025 21:10:41 70.30,-141.17 48.93 3.56 65
2 05/26/2025 22:00:19 -70.21, 26.32 131.16 05/26/2025 22:00:10 -70.23, 26.37 131.14 2.66 9
3 05/26/2025 22:50:55 69.70,-165.59 48.31 05/26/2025 22:49:44 69.75,-166.66 48.39 41.87 71
4 05/29/2025 13:26:33 70.26, -25.29 48.47 05/29/2025 13:27:09 70.28, -25.31 48.50 3.00 36
5 05/29/2025 14:17:16 -70.19, 142.13 131.60 05/29/2025 14:16:39 -70.17, 142.15 131.63 2.80 37
6 06/01/2025 04:52:53 -70.74, -77.61 131.40 06/01/2025 04:54:04 -70.63, -76.57 131.55 40.56 71
7 06/01/2025 05:43:29 70.24, 90.50 48.08 06/01/2025 05:43:36 70.25, 90.52 48.09 1.44 7
8 06/01/2025 06:34:11 -70.12,-101.99 132.06 06/01/2025 06:33:06 -70.14,-102.01 132.03 2.29 65
9 06/03/2025 21:09:42 -70.31, 38.85 132.18 06/03/2025 21:10:37 -70.31, 38.84 132.19 0.34 55
10 06/03/2025 22:00:25 70.18,-153.63 47.68 06/03/2025 22:00:04 70.21,-153.66 47.71 3.29 21
11 06/03/2025 22:50:54 -69.37, 14.90 133.16 06/03/2025 22:49:46 -69.43, 12.90 133.04 78.35 68
12 06/06/2025 13:26:38 -70.25, 154.72 132.53 06/06/2025 13:27:05 -70.25, 154.64 132.53 3.02 27
13 06/06/2025 14:17:22 70.17, -37.85 47.39 06/06/2025 14:16:31 70.20, -37.80 47.41 3.22 51

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 5/25/2025
SNOs_Map_NPP_LANDSAT-9_20250526.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 05/25/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9