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: 8/26/2025
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 08/28/2025 04:53:32 70.97, 102.16 61.32 08/28/2025 04:54:40 70.89, 103.96 61.19 65.80 68
2 08/28/2025 05:44:02 -70.26, -89.36 119.41 08/28/2025 05:44:19 -70.28, -89.33 119.40 2.88 17
3 08/28/2025 06:34:46 70.13, 78.15 60.47 08/28/2025 06:33:47 70.13, 78.10 60.47 1.86 59
4 08/30/2025 21:10:20 70.33,-141.03 61.60 08/30/2025 21:11:18 70.32,-141.01 61.59 0.73 58
5 08/30/2025 22:01:02 -70.24, 26.43 118.49 08/30/2025 22:00:48 -70.21, 26.46 118.52 3.19 14
6 08/30/2025 22:51:34 69.48,-165.12 60.75 08/30/2025 22:50:25 69.56,-166.81 60.87 66.31 69
7 09/02/2025 13:27:20 70.26, -25.18 62.50 09/02/2025 13:27:47 70.29, -25.18 62.52 2.49 27
8 09/02/2025 14:18:02 -70.17, 142.29 117.59 09/02/2025 14:17:17 -70.17, 142.29 117.58 0.65 45
9 09/05/2025 04:53:37 -70.37, -76.90 116.43 09/05/2025 04:54:49 -70.33, -76.87 116.47 4.13 72
10 09/05/2025 05:44:20 70.21, 90.67 63.42 09/05/2025 05:44:16 70.23, 90.62 63.44 2.88 4
11 09/05/2025 06:35:00 -70.00,-101.70 116.78 09/05/2025 06:33:47 -70.06,-101.98 116.71 12.86 73
12 09/07/2025 21:10:37 -70.31, 38.95 115.49 09/07/2025 21:11:17 -70.31, 38.99 115.49 1.68 40
13 09/07/2025 22:01:21 70.21,-153.58 64.42 09/07/2025 22:00:44 70.20,-153.52 64.42 2.22 37

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/26/2025
SNOs_Map_NPP_LANDSAT-9_20250827.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 08/26/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9