Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between LANDSAT-8 and NPP Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 4/20/2025
Index Date (LANDSAT-8) Time (LANDSAT-8) Lat,Lon (LANDSAT-8) SZA (LANDSAT-8 ) Date (NPP) Time (NPP) Lat,Lon (NPP) SZA (NPP ) Distance(km) Time Diff (sec)
1 04/20/2025 21:35:25 -70.27, 32.61 121.65 04/20/2025 21:34:16 -70.29, 32.62 121.61 2.57 69
2 04/20/2025 22:24:51 70.17,-159.88 58.25 04/20/2025 22:24:59 70.16,-159.87 58.24 1.34 8
3 04/20/2025 23:14:25 -69.83, 7.27 122.10 04/20/2025 23:15:36 -69.82, 7.97 122.13 26.71 71
4 04/23/2025 13:51:50 -70.23, 148.44 122.59 04/23/2025 13:51:13 -70.21, 148.51 122.60 3.11 37
5 04/23/2025 14:41:17 70.13, -44.06 57.31 04/23/2025 14:41:58 70.14, -44.07 57.31 1.27 41
6 04/26/2025 05:18:44 70.37, 96.91 56.70 04/26/2025 05:17:32 70.39, 96.67 56.72 9.12 72
7 04/26/2025 06:08:15 -70.20, -95.70 123.49 04/26/2025 06:08:12 -70.19, -95.70 123.50 1.52 3
8 04/26/2025 06:57:43 70.04, 71.72 56.35 04/26/2025 06:58:55 70.02, 71.87 56.32 6.54 72
9 04/28/2025 21:35:10 70.25,-147.37 55.73 04/28/2025 21:34:29 70.28,-147.40 55.76 3.03 41
10 04/28/2025 22:24:40 -70.14, 20.11 124.40 04/28/2025 22:25:10 -70.13, 20.15 124.41 2.31 30
11 05/01/2025 13:02:01 -70.65, 161.46 124.70 05/01/2025 13:00:50 -70.71, 160.37 124.61 40.62 71
12 05/01/2025 13:51:34 70.21, -31.54 54.86 05/01/2025 13:51:26 70.18, -31.48 54.84 3.34 8
13 05/01/2025 14:41:03 -70.09, 135.94 125.26 05/01/2025 14:42:07 -70.08, 136.00 125.28 2.90 64

Figure of LANDSAT-8 and NPP satellite orbits during SNOs since TLE Epoch: 4/20/2025
SNOs_Map_LANDSAT-8_NPP_20250420.jpg

Download SNOs between LANDSAT-8 and NPP since TLE EPOCH: 04/20/2025 in txt file.

Historial Predications of SNOs between LANDSAT-8 and NPP