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: 4/29/2025
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 04/30/2025 05:42:57 70.23, 90.56 55.30 04/30/2025 05:43:55 70.23, 90.49 55.29 2.46 58
2 04/30/2025 06:33:39 -70.14,-101.98 124.81 04/30/2025 06:33:25 -70.12,-102.04 124.83 3.07 14
3 04/30/2025 07:24:11 69.38, 66.45 54.41 04/30/2025 07:23:03 69.41, 64.63 54.47 71.16 68
4 05/02/2025 21:59:55 70.19,-153.62 54.45 05/02/2025 22:00:24 70.20,-153.68 54.45 2.42 29
5 05/02/2025 22:50:37 -70.10, 13.85 125.66 05/02/2025 22:49:54 -70.08, 13.79 125.67 2.57 43
6 05/05/2025 13:26:12 -70.43, 154.46 126.07 05/05/2025 13:27:23 -70.39, 154.83 126.12 14.43 71
7 05/05/2025 14:16:53 70.17, -37.81 53.65 05/05/2025 14:16:52 70.17, -37.84 53.66 1.05 1
8 05/05/2025 15:07:35 -70.06, 129.66 126.47 05/05/2025 15:06:22 -70.06, 129.64 126.46 0.79 73
9 05/08/2025 05:43:06 -70.25, -89.49 127.00 05/08/2025 05:43:52 -70.22, -89.53 127.03 3.33 46
10 05/08/2025 06:33:50 70.15, 77.98 52.90 05/08/2025 06:33:18 70.17, 78.04 52.91 2.84 32
11 05/10/2025 21:09:32 70.88,-142.05 52.96 05/10/2025 21:10:40 70.78,-140.45 52.82 59.44 68
12 05/10/2025 22:00:04 -70.24, 26.30 127.72 05/10/2025 22:00:18 -70.24, 26.38 127.72 2.79 14
13 05/10/2025 22:50:47 70.09,-166.16 52.13 05/10/2025 22:49:45 70.12,-166.14 52.16 3.36 62

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/29/2025
SNOs_Map_NPP_LANDSAT-9_20250501.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 04/29/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9