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: 2/18/2025
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 02/19/2025 21:59:37 -70.59, 25.70 98.40 02/19/2025 22:00:47 -70.51, 26.80 98.55 41.84 70
2 02/19/2025 22:50:13 70.06,-166.15 81.02 02/19/2025 22:50:20 70.08,-166.18 81.04 2.26 7
3 02/19/2025 23:40:55 -69.97, 1.30 99.09 02/19/2025 23:39:50 -69.96, 1.29 99.09 0.73 65
4 02/22/2025 14:16:22 -70.15, 142.19 99.85 02/22/2025 14:17:21 -70.15, 142.16 99.86 1.18 59
5 02/22/2025 15:07:06 70.03, -50.33 80.02 02/22/2025 15:06:48 70.04, -50.35 80.03 1.04 18
6 02/22/2025 15:57:37 -69.36, 117.98 100.70 02/22/2025 15:56:27 -69.43, 116.45 100.56 60.24 70
7 02/25/2025 06:33:14 -70.13,-102.01 100.86 02/25/2025 06:33:47 -70.11,-102.00 100.89 2.12 33
8 02/25/2025 07:23:58 70.02, 65.48 79.01 02/25/2025 07:23:14 70.00, 65.49 79.00 1.83 44
9 02/27/2025 21:59:29 70.43,-154.01 78.47 02/27/2025 22:00:40 70.36,-153.39 78.35 24.44 71
10 02/27/2025 22:50:06 -70.08, 13.86 101.92 02/27/2025 22:50:13 -70.09, 13.85 101.92 0.88 7
11 02/27/2025 23:40:50 69.96,-178.66 77.95 02/27/2025 23:39:40 69.97,-178.66 77.96 0.85 70
12 03/02/2025 14:16:17 70.18, -37.82 77.18 03/02/2025 14:17:08 70.17, -37.77 77.15 2.49 51
13 03/02/2025 15:06:58 -70.04, 129.71 102.99 03/02/2025 15:06:38 -70.06, 129.72 102.96 2.85 20

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 2/18/2025
SNOs_Map_NPP_LANDSAT-9_20250218.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 02/18/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9