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: 3/12/2025
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 03/13/2025 06:32:57 -70.16,-101.94 107.03 03/13/2025 06:33:43 -70.14,-101.98 107.06 2.91 46
2 03/13/2025 07:23:41 70.02, 65.57 72.81 03/13/2025 07:23:10 70.03, 65.52 72.83 2.44 31
3 03/15/2025 21:59:21 70.98,-154.80 72.80 03/15/2025 22:00:28 70.89,-152.61 72.61 80.34 67
4 03/15/2025 22:49:48 -70.13, 13.89 108.13 03/15/2025 22:50:10 -70.12, 13.88 108.14 1.52 22
5 03/15/2025 23:40:32 70.00,-178.60 71.72 03/15/2025 23:39:37 70.01,-178.63 71.75 1.99 55
6 03/18/2025 14:15:57 70.24, -37.80 70.94 03/18/2025 14:17:05 70.22, -37.72 70.91 3.48 68
7 03/18/2025 15:06:38 -70.12, 129.71 109.21 03/18/2025 15:06:35 -70.11, 129.76 109.22 1.97 3
8 03/18/2025 15:57:18 69.77, -62.46 70.42 03/18/2025 15:56:05 69.84, -62.98 70.51 21.16 73
9 03/21/2025 06:32:47 70.18, 78.08 69.82 03/21/2025 06:33:31 70.17, 78.10 69.79 1.83 44
10 03/21/2025 07:23:28 -70.06,-114.41 110.33 03/21/2025 07:23:01 -70.06,-114.42 110.33 0.42 27
11 03/23/2025 21:59:09 -71.10, 25.07 110.27 03/23/2025 22:00:15 -71.00, 27.60 110.46 91.95 66
12 03/23/2025 22:49:37 70.14,-166.06 68.71 03/23/2025 22:49:56 70.12,-166.07 68.69 1.88 19
13 03/23/2025 23:40:18 -70.02, 1.45 111.44 03/23/2025 23:39:26 -70.02, 1.42 111.43 1.40 52

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 3/12/2025
SNOs_Map_NPP_LANDSAT-9_20250312.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 03/12/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9