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: 10/23/2025
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 10/25/2025 20:21:04 70.39,-128.61 82.69 10/25/2025 20:22:03 70.37,-128.61 82.66 2.28 59
2 10/25/2025 21:11:46 -70.28, 38.87 97.41 10/25/2025 21:11:33 -70.26, 38.86 97.44 3.06 13
3 10/25/2025 22:02:18 69.55,-152.70 81.87 10/25/2025 22:01:10 69.60,-154.42 81.91 66.71 68
4 10/28/2025 12:38:00 70.32, -12.73 83.52 10/28/2025 12:38:30 70.33, -12.77 83.53 2.42 30
5 10/28/2025 13:28:42 -70.21, 154.75 96.58 10/28/2025 13:28:00 -70.23, 154.71 96.57 2.25 42
6 10/31/2025 04:04:16 -70.57, -64.66 95.37 10/31/2025 04:05:28 -70.49, -64.30 95.45 16.40 72
7 10/31/2025 04:54:57 70.31, 103.06 84.39 10/31/2025 04:54:56 70.32, 103.10 84.40 1.85 1
8 10/31/2025 05:45:39 -70.20, -89.46 95.71 10/31/2025 05:44:26 -70.21, -89.42 95.71 1.65 73
9 11/02/2025 20:21:09 -70.36, 51.45 94.73 11/02/2025 20:21:55 -70.38, 51.45 94.71 2.15 46
10 11/02/2025 21:11:53 70.26,-141.08 85.19 11/02/2025 21:11:22 70.26,-141.08 85.19 0.81 31
11 11/05/2025 11:47:33 71.00, -1.14 86.73 11/05/2025 11:48:41 70.89, 0.48 86.63 59.97 68
12 11/05/2025 12:38:04 -70.32, 167.29 93.94 11/05/2025 12:38:19 -70.35, 167.30 93.92 3.01 15
13 11/05/2025 13:28:48 70.21, -25.24 85.97 11/05/2025 13:27:46 70.23, -25.23 85.98 1.48 62

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/23/2025
SNOs_Map_NPP_LANDSAT-9_20251024.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 10/23/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9