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: 3/14/2025
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 03/15/2025 21:59:20 70.97,-154.78 72.78 03/15/2025 22:00:27 70.89,-152.62 72.61 79.08 67
2 03/15/2025 22:49:47 -70.12, 13.91 108.14 03/15/2025 22:50:09 -70.11, 13.87 108.15 1.56 22
3 03/15/2025 23:40:32 70.03,-178.65 71.76 03/15/2025 23:39:36 70.01,-178.63 71.74 2.73 56
4 03/18/2025 14:15:56 70.17, -37.69 70.87 03/18/2025 14:17:05 70.19, -37.76 70.88 3.53 69
5 03/18/2025 15:06:38 -70.10, 129.73 109.22 03/18/2025 15:06:35 -70.08, 129.71 109.25 3.06 3
6 03/18/2025 15:57:17 69.70, -62.36 70.35 03/18/2025 15:56:05 69.80, -63.03 70.48 27.90 72
7 03/21/2025 06:32:47 70.17, 78.10 69.80 03/21/2025 06:33:30 70.14, 78.07 69.77 2.88 43
8 03/21/2025 07:23:28 -70.05,-114.39 110.34 03/21/2025 07:23:00 -70.03,-114.45 110.35 2.74 28
9 03/23/2025 21:59:06 -70.99, 25.27 110.39 03/23/2025 22:00:13 -70.92, 27.48 110.54 80.80 67
10 03/23/2025 22:49:36 70.13,-166.04 68.70 03/23/2025 22:49:52 70.15,-166.02 68.72 2.96 16
11 03/23/2025 23:40:18 -70.06, 1.39 111.40 03/23/2025 23:39:22 -70.05, 1.46 111.41 3.22 56
12 03/26/2025 14:15:42 -70.23, 142.30 112.25 03/26/2025 14:16:48 -70.22, 142.34 112.27 1.71 66
13 03/26/2025 15:06:26 70.10, -50.20 67.61 03/26/2025 15:06:15 70.11, -50.18 67.61 0.87 11
14 03/26/2025 15:57:01 -69.66, 117.78 112.87 03/26/2025 15:55:50 -69.72, 116.92 112.77 34.09 71

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 3/14/2025
SNOs_Map_NPP_LANDSAT-9_20250314.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 03/14/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9