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: 8/29/2025
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 08/30/2025 21:10:20 70.32,-141.03 61.59 08/30/2025 21:11:19 70.33,-141.01 61.59 0.73 59
2 08/30/2025 22:01:01 -70.19, 26.51 118.54 08/30/2025 22:00:49 -70.20, 26.44 118.52 3.08 12
3 08/30/2025 22:51:35 69.53,-165.20 60.80 08/30/2025 22:50:26 69.56,-166.81 60.88 62.68 69
4 09/02/2025 13:27:20 70.26, -25.18 62.50 09/02/2025 13:27:51 70.25, -25.25 62.48 3.10 31
5 09/02/2025 14:18:02 -70.17, 142.28 117.59 09/02/2025 14:17:20 -70.18, 142.29 117.58 1.03 42
6 09/05/2025 04:53:40 -70.54, -77.16 116.25 09/05/2025 04:54:52 -70.45, -76.71 116.35 19.14 72
7 09/05/2025 05:44:21 70.26, 90.58 63.48 09/05/2025 05:44:21 70.25, 90.64 63.47 2.74 0
8 09/05/2025 06:35:02 -70.11,-101.87 116.66 09/05/2025 06:33:51 -70.13,-101.90 116.64 2.22 71
9 09/07/2025 21:10:37 -70.33, 38.92 115.47 09/07/2025 21:11:24 -70.32, 38.98 115.48 2.18 47
10 09/07/2025 22:01:20 70.17,-153.52 64.38 09/07/2025 22:00:52 70.17,-153.59 64.39 2.91 28
11 09/10/2025 12:37:06 71.03, -13.78 66.25 09/10/2025 12:38:14 70.89, -11.92 66.07 69.03 68
12 09/10/2025 13:27:36 -70.29, 154.75 114.51 09/10/2025 13:27:53 -70.28, 154.79 114.52 2.07 17
13 09/10/2025 14:18:19 70.13, -37.70 65.35 09/10/2025 14:17:21 70.12, -37.78 65.35 3.01 58

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/29/2025
SNOs_Map_NPP_LANDSAT-9_20250830.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 08/29/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9