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: 9/3/2025
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 09/05/2025 04:53:41 -70.61, -77.28 116.18 09/05/2025 04:54:53 -70.49, -76.67 116.32 25.87 72
2 09/05/2025 05:44:20 70.22, 90.64 63.44 09/05/2025 05:44:23 70.23, 90.59 63.44 1.94 3
3 09/05/2025 06:35:02 -70.13,-101.90 116.65 09/05/2025 06:33:53 -70.11,-101.94 116.66 2.70 69
4 09/07/2025 21:10:36 -70.30, 38.97 115.50 09/07/2025 21:11:26 -70.32, 38.96 115.48 2.68 50
5 09/07/2025 22:01:20 70.19,-153.55 64.40 09/07/2025 22:00:54 70.17,-153.62 64.38 3.39 26
6 09/07/2025 22:51:45 -69.19, 15.24 116.61 09/07/2025 22:50:39 -69.23, 12.73 116.52 99.26 66
7 09/10/2025 12:37:07 71.11, -13.91 66.33 09/10/2025 12:38:14 71.00, -11.77 66.18 78.38 67
8 09/10/2025 13:27:35 -70.27, 154.78 114.53 09/10/2025 13:27:55 -70.29, 154.79 114.51 2.38 20
9 09/10/2025 14:18:19 70.16, -37.75 65.38 09/10/2025 14:17:22 70.18, -37.71 65.40 2.76 57
10 09/13/2025 04:53:52 70.30, 103.17 66.52 09/13/2025 04:54:55 70.32, 103.09 66.53 3.42 63
11 09/13/2025 05:44:35 -70.24, -89.43 113.54 09/13/2025 05:44:25 -70.21, -89.43 113.57 3.27 10
12 09/13/2025 06:35:09 69.61, 78.84 65.84 09/13/2025 06:34:00 69.66, 77.44 65.91 54.21 69
13 09/15/2025 21:10:52 70.29,-141.06 67.53 09/15/2025 21:11:23 70.32,-141.03 67.55 2.85 31
14 09/15/2025 22:01:34 -70.18, 26.44 112.58 09/15/2025 22:00:54 -70.16, 26.38 112.60 3.15 40

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/3/2025
SNOs_Map_NPP_LANDSAT-9_20250904.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/03/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9