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: 10/18/2025
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 10/20/2025 12:37:53 -70.33, 167.26 99.24 10/20/2025 12:38:38 -70.34, 167.21 99.23 2.26 45
2 10/20/2025 13:28:37 70.23, -25.28 80.68 10/20/2025 13:28:05 70.24, -25.30 80.68 0.81 32
3 10/23/2025 04:04:18 70.98, 114.65 82.35 10/23/2025 04:05:27 70.89, 116.28 82.26 60.08 69
4 10/23/2025 04:54:49 -70.29, -76.91 98.33 10/23/2025 04:55:06 -70.29, -76.98 98.34 2.81 17
5 10/23/2025 05:45:33 70.19, 90.55 81.59 10/23/2025 05:44:33 70.18, 90.50 81.57 2.45 60
6 10/25/2025 20:21:04 70.37,-128.58 82.67 10/25/2025 20:22:04 70.36,-128.63 82.65 2.24 60
7 10/25/2025 21:11:46 -70.26, 38.91 97.44 10/25/2025 21:11:34 -70.25, 38.85 97.45 2.26 12
8 10/25/2025 22:02:19 69.58,-152.75 81.91 10/25/2025 22:01:10 69.64,-154.36 81.96 62.45 69
9 10/28/2025 12:38:01 70.35, -12.78 83.55 10/28/2025 12:38:31 70.34, -12.76 83.54 1.26 30
10 10/28/2025 13:28:43 -70.24, 154.71 96.55 10/28/2025 13:28:01 -70.24, 154.72 96.56 0.40 42
11 10/31/2025 04:04:17 -70.59, -64.70 95.35 10/31/2025 04:05:29 -70.52, -64.25 95.42 18.61 72
12 10/31/2025 04:54:57 70.29, 103.10 84.37 10/31/2025 04:54:58 70.29, 103.06 84.37 1.45 1
13 10/31/2025 05:45:39 -70.18, -89.41 95.74 10/31/2025 05:44:28 -70.19, -89.45 95.73 2.07 71

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/18/2025
SNOs_Map_NPP_LANDSAT-9_20251018.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/18/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9