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: 4/13/2025
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 04/14/2025 05:42:45 70.90, 89.54 61.36 04/14/2025 05:43:53 70.83, 91.39 61.24 67.61 68
2 04/14/2025 06:33:14 -70.15,-101.93 119.44 04/14/2025 06:33:33 -70.17,-101.96 119.42 3.16 19
3 04/14/2025 07:23:59 70.06, 65.52 60.46 04/14/2025 07:23:00 70.07, 65.54 60.48 1.49 59
4 04/16/2025 21:59:31 70.22,-153.60 59.70 04/16/2025 22:00:31 70.22,-153.65 59.69 1.62 60
5 04/16/2025 22:50:13 -70.14, 13.84 120.40 04/16/2025 22:50:00 -70.17, 13.91 120.38 3.63 13
6 04/16/2025 23:40:46 69.43,-177.79 58.85 04/16/2025 23:39:37 69.51,-179.36 58.98 61.99 69
7 04/19/2025 14:16:30 70.18, -37.79 58.72 04/19/2025 14:16:59 70.16, -37.85 58.70 3.41 29
8 04/19/2025 15:07:12 -70.10, 129.66 121.38 04/19/2025 15:06:28 -70.11, 129.71 121.37 2.13 44
9 04/22/2025 05:42:46 -70.34, -89.57 122.02 04/22/2025 05:43:57 -70.33, -89.36 122.04 7.95 71
10 04/22/2025 06:33:29 70.16, 78.01 57.79 04/22/2025 06:33:25 70.17, 78.05 57.79 1.39 4
11 04/22/2025 07:24:09 -69.97,-114.37 122.43 04/22/2025 07:22:56 -70.00,-114.55 122.38 7.82 73
12 04/24/2025 21:59:43 -70.21, 26.38 123.04 04/24/2025 22:00:24 -70.24, 26.39 123.02 2.55 41
13 04/24/2025 22:50:27 70.10,-166.13 56.84 04/24/2025 22:49:51 70.12,-166.13 56.86 2.36 36

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/13/2025
SNOs_Map_NPP_LANDSAT-9_20250413.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 04/13/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9