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: 3/19/2025
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 03/21/2025 06:32:46 70.15, 78.13 69.79 03/21/2025 06:33:29 70.17, 78.10 69.79 1.59 43
2 03/21/2025 07:23:27 -70.04,-114.38 110.35 03/21/2025 07:22:59 -70.05,-114.43 110.34 2.31 28
3 03/23/2025 21:59:06 -71.00, 25.25 110.38 03/23/2025 22:00:13 -70.92, 27.47 110.54 81.10 67
4 03/23/2025 22:49:36 70.13,-166.04 68.70 03/23/2025 22:49:52 70.15,-166.02 68.72 2.57 16
5 03/23/2025 23:40:17 -70.02, 1.46 111.44 03/23/2025 23:39:22 -70.04, 1.45 111.41 2.57 55
6 03/26/2025 14:15:41 -70.21, 142.33 112.27 03/26/2025 14:16:48 -70.19, 142.30 112.30 2.21 67
7 03/26/2025 15:06:25 70.08, -50.16 67.58 03/26/2025 15:06:15 70.08, -50.22 67.59 2.33 10
8 03/26/2025 15:57:01 -69.69, 117.74 112.84 03/26/2025 15:55:49 -69.75, 116.95 112.75 30.93 72
9 03/29/2025 06:32:29 -70.16,-101.80 113.37 03/29/2025 06:33:08 -70.16,-101.83 113.38 1.11 39
10 03/29/2025 07:23:13 70.04, 65.70 66.49 03/29/2025 07:22:35 70.05, 65.65 66.50 2.33 38
11 03/31/2025 21:58:43 70.58,-153.98 66.04 03/31/2025 21:59:54 70.46,-153.12 65.88 34.65 71
12 03/31/2025 22:49:18 -70.14, 14.04 114.44 03/31/2025 22:49:28 -70.13, 14.04 114.45 1.25 10
13 03/31/2025 23:40:02 70.02,-178.46 65.42 03/31/2025 23:38:55 70.01,-178.49 65.42 1.25 67

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 3/19/2025
SNOs_Map_NPP_LANDSAT-9_20250319.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 03/19/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9