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: 10/22/2025
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 04:04:19 71.00, 114.61 82.37 10/23/2025 04:05:27 70.90, 116.31 82.28 62.66 68
2 10/23/2025 04:54:50 -70.32, -76.96 98.30 10/23/2025 04:55:06 -70.30, -76.97 98.33 2.41 16
3 10/23/2025 05:45:34 70.22, 90.51 81.61 10/23/2025 05:44:33 70.19, 90.53 81.59 2.76 61
4 10/25/2025 20:21:04 70.35,-128.54 82.64 10/25/2025 20:22:04 70.36,-128.62 82.65 3.36 60
5 10/25/2025 21:11:47 -70.29, 38.86 97.41 10/25/2025 21:11:33 -70.30, 38.93 97.40 2.95 14
6 10/25/2025 22:02:19 69.56,-152.72 81.88 10/25/2025 22:01:10 69.65,-154.35 81.96 64.22 69
7 10/28/2025 12:38:00 70.33, -12.74 83.53 10/28/2025 12:38:30 70.32, -12.78 83.52 1.67 30
8 10/28/2025 13:28:42 -70.22, 154.75 96.57 10/28/2025 13:28:00 -70.22, 154.69 96.58 1.97 42
9 10/31/2025 04:04:16 -70.57, -64.67 95.36 10/31/2025 04:05:27 -70.53, -64.23 95.41 17.01 71
10 10/31/2025 04:54:57 70.32, 103.05 84.40 10/31/2025 04:54:56 70.30, 103.08 84.38 1.87 1
11 10/31/2025 05:45:39 -70.21, -89.47 95.70 10/31/2025 05:44:26 -70.20, -89.44 95.72 1.75 73
12 11/02/2025 20:21:09 -70.36, 51.44 94.72 11/02/2025 20:21:55 -70.36, 51.42 94.72 0.69 46
13 11/02/2025 21:11:53 70.26,-141.09 85.19 11/02/2025 21:11:22 70.25,-141.10 85.17 1.99 31

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/22/2025
SNOs_Map_NPP_LANDSAT-9_20251022.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/22/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9