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: 10/14/2025
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 10/15/2025 04:54:42 70.30, 103.07 78.80 10/15/2025 04:55:06 70.29, 103.02 78.79 2.24 24
2 10/15/2025 05:45:24 -70.19, -89.44 101.31 10/15/2025 05:44:36 -70.18, -89.51 101.32 2.98 48
3 10/17/2025 20:20:57 -70.44, 51.31 100.10 10/17/2025 20:22:08 -70.41, 51.42 100.13 5.69 71
4 10/17/2025 21:11:40 70.29,-141.15 79.78 10/17/2025 21:11:35 70.30,-141.09 79.78 2.52 5
5 10/17/2025 22:02:20 -70.08, 26.51 100.44 10/17/2025 22:01:06 -70.14, 26.31 100.38 10.21 74
6 10/20/2025 12:37:53 -70.34, 167.24 99.23 10/20/2025 12:38:38 -70.34, 167.20 99.24 1.57 45
7 10/20/2025 13:28:37 70.24, -25.30 80.69 10/20/2025 13:28:05 70.23, -25.31 80.67 1.91 32
8 10/23/2025 04:04:19 70.99, 114.64 82.36 10/23/2025 04:05:28 70.89, 116.28 82.26 60.70 69
9 10/23/2025 04:54:50 -70.29, -76.92 98.33 10/23/2025 04:55:07 -70.29, -76.98 98.34 2.43 17
10 10/23/2025 05:45:34 70.20, 90.54 81.60 10/23/2025 05:44:34 70.18, 90.50 81.57 3.03 60
11 10/25/2025 20:21:04 70.38,-128.59 82.67 10/25/2025 20:22:04 70.37,-128.61 82.66 1.07 60
12 10/25/2025 21:11:46 -70.26, 38.91 97.44 10/25/2025 21:11:34 -70.27, 38.87 97.43 1.50 12
13 10/25/2025 22:02:19 69.58,-152.76 81.91 10/25/2025 22:01:10 69.66,-154.34 81.97 61.70 69
14 10/28/2025 12:38:01 70.35, -12.78 83.55 10/28/2025 12:38:31 70.37, -12.72 83.57 2.98 30
15 10/28/2025 13:28:43 -70.23, 154.72 96.56 10/28/2025 13:28:02 -70.21, 154.69 96.58 2.61 41

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/14/2025
SNOs_Map_NPP_LANDSAT-9_20251015.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/14/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9