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 10/20/2025 12:37:53 -70.33, 167.25 99.24 10/20/2025 12:38:38 -70.34, 167.20 99.23 1.79 45
2 10/20/2025 13:28:37 70.23, -25.29 80.68 10/20/2025 13:28:05 70.24, -25.30 80.68 0.59 32
3 10/23/2025 04:04:18 70.98, 114.64 82.35 10/23/2025 04:05:27 70.87, 116.26 82.25 60.07 69
4 10/23/2025 04:54:49 -70.30, -76.92 98.33 10/23/2025 04:55:05 -70.33, -76.93 98.30 3.15 16
5 10/23/2025 05:45:33 70.20, 90.54 81.59 10/23/2025 05:44:32 70.22, 90.56 81.61 2.45 61
6 10/25/2025 20:21:04 70.38,-128.60 82.68 10/25/2025 20:22:03 70.38,-128.59 82.68 0.34 59
7 10/25/2025 21:11:46 -70.27, 38.89 97.42 10/25/2025 21:11:33 -70.27, 38.89 97.43 0.17 13
8 10/25/2025 22:02:19 69.59,-152.77 81.92 10/25/2025 22:01:10 69.61,-154.40 81.92 63.16 69
9 10/28/2025 12:38:00 70.32, -12.72 83.52 10/28/2025 12:38:30 70.34, -12.76 83.54 3.06 30
10 10/28/2025 13:28:43 -70.26, 154.68 96.53 10/28/2025 13:28:00 -70.23, 154.72 96.56 3.12 43
11 10/31/2025 04:04:16 -70.57, -64.66 95.37 10/31/2025 04:05:28 -70.48, -64.30 95.45 16.44 72
12 10/31/2025 04:54:57 70.31, 103.06 84.39 10/31/2025 04:54:56 70.31, 103.10 84.39 1.52 1
13 10/31/2025 05:45:39 -70.20, -89.45 95.71 10/31/2025 05:44:26 -70.21, -89.42 95.71 1.51 73
14 11/02/2025 20:21:08 -70.37, 51.44 94.72 11/02/2025 20:21:54 -70.36, 51.43 94.72 0.56 46
15 11/02/2025 21:11:52 70.27,-141.10 85.20 11/02/2025 21:11:21 70.25,-141.10 85.17 2.53 31

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/20/2025
SNOs_Map_NPP_LANDSAT-9_20251020.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