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: 10/20/2025
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 10/23/2025 04:04:18 70.97, 114.66 82.34 10/23/2025 04:05:27 70.88, 116.27 82.26 59.33 69
2 10/23/2025 04:54:50 -70.34, -76.99 98.29 10/23/2025 04:55:05 -70.33, -76.92 98.29 2.62 15
3 10/23/2025 05:45:33 70.19, 90.56 81.58 10/23/2025 05:44:33 70.17, 90.49 81.56 2.99 60
4 10/25/2025 20:21:04 70.37,-128.58 82.66 10/25/2025 20:22:03 70.38,-128.59 82.68 2.02 59
5 10/25/2025 21:11:46 -70.26, 38.91 97.44 10/25/2025 21:11:33 -70.28, 38.89 97.42 2.11 13
6 10/25/2025 22:02:19 69.58,-152.75 81.90 10/25/2025 22:01:10 69.61,-154.39 81.93 63.96 69
7 10/28/2025 12:38:01 70.35, -12.77 83.55 10/28/2025 12:38:30 70.34, -12.76 83.54 1.34 29
8 10/28/2025 13:28:43 -70.24, 154.71 96.55 10/28/2025 13:28:00 -70.23, 154.72 96.56 1.07 43
9 10/31/2025 04:04:15 -70.54, -64.62 95.39 10/31/2025 04:05:27 -70.47, -64.31 95.46 14.08 72
10 10/31/2025 04:54:56 70.29, 103.10 84.37 10/31/2025 04:54:55 70.30, 103.09 84.38 1.76 1
11 10/31/2025 05:45:38 -70.18, -89.42 95.73 10/31/2025 05:44:25 -70.20, -89.43 95.72 2.11 73
12 11/02/2025 20:21:08 -70.34, 51.48 94.75 11/02/2025 20:21:54 -70.35, 51.40 94.74 3.11 46
13 11/02/2025 21:11:52 70.24,-141.05 85.17 11/02/2025 21:11:21 70.23,-141.12 85.16 2.93 31

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/20/2025
SNOs_Map_NPP_LANDSAT-9_20251021.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/20/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9