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: 4/25/2025
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 04/27/2025 13:26:06 70.61, -25.81 56.53 04/27/2025 13:27:17 70.48, -25.01 56.37 33.52 71
2 04/27/2025 14:16:42 -70.21, 142.15 123.91 04/27/2025 14:16:50 -70.20, 142.22 123.92 3.08 8
3 04/27/2025 15:07:26 70.09, -50.35 55.96 04/27/2025 15:06:17 70.09, -50.29 55.97 2.62 69
4 04/30/2025 05:42:57 70.25, 90.53 55.32 04/30/2025 05:43:44 70.26, 90.58 55.32 2.15 47
5 04/30/2025 06:33:39 -70.16,-102.00 124.80 04/30/2025 06:33:14 -70.15,-101.95 124.80 2.09 25
6 05/02/2025 21:09:23 -70.95, 37.85 124.76 05/02/2025 21:10:31 -70.88, 39.75 124.87 69.49 68
7 05/02/2025 21:59:55 70.21,-153.65 54.47 05/02/2025 22:00:08 70.23,-153.58 54.48 3.02 13
8 05/02/2025 22:50:37 -70.11, 13.83 125.65 05/02/2025 22:49:38 -70.11, 13.90 125.64 2.68 59
9 05/05/2025 13:26:09 -70.29, 154.69 126.22 05/05/2025 13:27:05 -70.26, 154.73 126.25 3.12 56
10 05/05/2025 14:16:52 70.13, -37.76 53.62 05/05/2025 14:16:32 70.15, -37.79 53.63 1.91 20
11 05/05/2025 15:07:22 -69.39, 130.66 127.16 05/05/2025 15:06:13 -69.44, 128.86 127.07 70.38 69
12 05/08/2025 04:52:39 71.12, 101.78 53.92 05/08/2025 04:53:45 71.03, 104.15 53.77 85.85 66
13 05/08/2025 05:43:06 -70.21, -89.43 127.03 05/08/2025 05:43:28 -70.21, -89.45 127.05 1.26 22
14 05/08/2025 06:33:50 70.12, 78.03 52.86 05/08/2025 06:32:55 70.09, 78.03 52.83 3.49 55

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/25/2025
SNOs_Map_NPP_LANDSAT-9_20250425.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 04/25/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9