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: 7/20/2025
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 07/21/2025 21:09:59 -70.33, 38.92 129.97 07/21/2025 21:11:04 -70.31, 38.97 130.00 2.88 65
2 07/21/2025 22:00:43 70.19,-153.55 49.89 07/21/2025 22:00:31 70.20,-153.54 49.91 2.08 12
3 07/21/2025 22:51:18 -69.76, 14.42 130.56 07/21/2025 22:50:06 -69.82, 13.56 130.45 34.14 72
4 07/24/2025 13:26:53 -70.25, 154.81 129.50 07/24/2025 13:27:35 -70.27, 154.79 129.49 1.98 42
5 07/24/2025 14:17:38 70.17, -37.74 50.42 07/24/2025 14:17:02 70.16, -37.72 50.42 1.01 36
6 07/27/2025 04:53:18 70.93, 102.17 51.81 07/27/2025 04:54:27 70.81, 103.85 51.61 62.49 69
7 07/27/2025 05:43:48 -70.24, -89.38 128.92 07/27/2025 05:44:06 -70.22, -89.41 128.95 2.43 18
8 07/27/2025 06:34:32 70.10, 78.14 50.94 07/27/2025 06:33:33 70.10, 78.08 50.96 2.50 59
9 07/29/2025 21:10:00 70.29,-141.01 51.76 07/29/2025 21:11:05 70.30,-141.03 51.75 1.38 65
10 07/29/2025 22:00:42 -70.22, 26.42 128.31 07/29/2025 22:00:35 -70.20, 26.46 128.34 2.73 7
11 07/29/2025 22:51:19 69.72,-165.50 51.17 07/29/2025 22:50:08 69.76,-166.53 51.25 39.73 71
12 08/01/2025 13:26:55 70.29, -25.22 52.41 08/01/2025 13:27:35 70.27, -25.20 52.39 2.09 40
13 08/01/2025 14:17:36 -70.16, 142.30 127.71 08/01/2025 14:17:05 -70.17, 142.30 127.70 1.15 31

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/20/2025
SNOs_Map_NPP_LANDSAT-9_20250720.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 07/20/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9