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: 4/21/2025
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 04/22/2025 05:42:46 -70.35, -89.59 122.01 04/22/2025 05:43:57 -70.33, -89.36 122.04 8.70 71
2 04/22/2025 06:33:29 70.16, 78.00 57.79 04/22/2025 06:33:25 70.18, 78.06 57.80 2.46 4
3 04/22/2025 07:24:09 -69.98,-114.39 122.42 04/22/2025 07:22:56 -70.01,-114.55 122.38 6.71 73
4 04/24/2025 21:59:43 -70.22, 26.38 123.04 04/24/2025 22:00:25 -70.21, 26.34 123.05 1.75 42
5 04/24/2025 22:50:27 70.09,-166.12 56.83 04/24/2025 22:49:52 70.10,-166.16 56.84 1.72 35
6 04/27/2025 13:26:06 70.61, -25.81 56.53 04/27/2025 13:27:17 70.48, -25.00 56.37 33.17 71
7 04/27/2025 14:16:42 -70.20, 142.16 123.91 04/27/2025 14:16:50 -70.20, 142.23 123.92 2.48 8
8 04/27/2025 15:07:26 70.08, -50.35 55.96 04/27/2025 15:06:17 70.09, -50.28 55.97 2.59 69
9 04/30/2025 05:42:57 70.24, 90.54 55.31 04/30/2025 05:43:44 70.27, 90.58 55.33 2.93 47
10 04/30/2025 06:33:39 -70.14,-101.99 124.81 04/30/2025 06:33:14 -70.16,-101.94 124.80 2.17 25
11 05/02/2025 21:09:24 -70.98, 37.79 124.72 05/02/2025 21:10:32 -70.84, 39.69 124.91 70.75 68
12 05/02/2025 21:59:55 70.20,-153.63 54.46 05/02/2025 22:00:09 70.18,-153.65 54.44 2.71 14
13 05/02/2025 22:50:37 -70.10, 13.85 125.66 05/02/2025 22:49:39 -70.07, 13.83 125.68 2.89 58

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/21/2025
SNOs_Map_NPP_LANDSAT-9_20250421.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 04/21/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9