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: 9/27/2025
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 09/29/2025 04:54:21 70.29, 103.12 72.69 09/29/2025 04:55:00 70.30, 103.04 72.70 3.04 39
2 09/29/2025 05:45:04 -70.22, -89.46 107.37 09/29/2025 05:44:29 -70.24, -89.41 107.35 2.53 35
3 10/01/2025 20:20:45 -70.83, 50.70 105.74 10/01/2025 20:21:55 -70.74, 51.95 105.84 46.71 70
4 10/01/2025 21:11:20 70.27,-141.09 73.71 10/01/2025 21:11:29 70.26,-141.13 73.70 1.99 9
5 10/01/2025 22:02:02 -70.15, 26.42 106.40 10/01/2025 22:00:59 -70.15, 26.35 106.41 2.72 63
6 10/04/2025 12:37:35 -70.35, 167.24 105.20 10/04/2025 12:38:30 -70.34, 167.24 105.21 0.84 55
7 10/04/2025 13:28:18 70.21, -25.23 74.68 10/04/2025 13:27:57 70.23, -25.28 74.70 3.24 21
8 10/04/2025 14:18:47 -69.40, 143.30 106.12 10/04/2025 14:17:39 -69.46, 141.29 106.05 78.87 68
9 10/07/2025 04:04:07 71.31, 114.09 76.80 10/07/2025 04:05:12 71.20, 116.81 76.68 98.04 65
10 10/07/2025 04:54:32 -70.30, -76.91 104.22 10/07/2025 04:54:57 -70.28, -76.96 104.24 2.88 25
11 10/07/2025 05:45:16 70.21, 90.53 75.71 10/07/2025 05:44:23 70.22, 90.60 75.72 2.64 53
12 10/09/2025 20:20:48 70.38,-128.60 76.88 10/09/2025 20:21:53 70.39,-128.54 76.88 2.07 65
13 10/09/2025 21:11:30 -70.26, 38.92 103.24 10/09/2025 21:11:23 -70.28, 38.94 103.22 3.18 7
14 10/09/2025 22:02:07 69.80,-153.08 76.32 10/09/2025 22:00:56 69.84,-154.05 76.35 37.43 71

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/27/2025
SNOs_Map_NPP_LANDSAT-9_20250928.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 09/27/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9