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: 7/9/2025
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 07/11/2025 04:53:11 70.67, 102.56 48.61 07/11/2025 04:54:22 70.54, 103.45 48.43 35.88 71
2 07/11/2025 05:43:46 -70.23, -89.41 131.86 07/11/2025 05:43:56 -70.21, -89.40 131.88 2.01 10
3 07/11/2025 06:34:30 70.10, 78.10 48.01 07/11/2025 06:33:23 70.11, 78.09 48.03 1.01 67
4 07/13/2025 21:10:00 70.32,-141.09 48.62 07/13/2025 21:10:55 70.29,-141.03 48.58 3.38 55
5 07/13/2025 22:00:41 -70.19, 26.43 131.52 07/13/2025 22:00:25 -70.19, 26.45 131.52 0.92 16
6 07/13/2025 22:51:12 69.37,-165.04 47.63 07/13/2025 22:50:04 69.42,-166.97 47.76 75.70 68
7 07/16/2025 13:26:53 70.23, -25.17 48.95 07/16/2025 13:27:23 70.25, -25.20 48.97 3.11 30
8 07/16/2025 14:17:35 -70.15, 142.26 131.13 07/16/2025 14:16:53 -70.15, 142.29 131.12 0.93 42
9 07/19/2025 04:53:10 -70.64, -77.36 130.15 07/19/2025 04:54:21 -70.53, -76.54 130.30 32.32 71
10 07/19/2025 05:43:48 70.19, 90.65 49.39 07/19/2025 05:43:52 70.20, 90.61 49.39 1.68 4
11 07/19/2025 06:34:30 -70.12,-101.91 130.69 07/19/2025 06:33:22 -70.10,-101.90 130.70 2.33 68
12 07/21/2025 21:09:59 -70.29, 38.97 130.01 07/21/2025 21:10:53 -70.30, 39.01 130.01 1.79 54
13 07/21/2025 22:00:43 70.16,-153.52 49.87 07/21/2025 22:00:20 70.18,-153.52 49.89 2.20 23

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 7/9/2025
SNOs_Map_NPP_LANDSAT-9_20250709.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 07/09/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9