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: 5/3/2025
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 05/05/2025 13:26:12 -70.44, 154.45 126.06 05/05/2025 13:27:23 -70.39, 154.83 126.13 15.34 71
2 05/05/2025 14:16:53 70.17, -37.82 53.66 05/05/2025 14:16:52 70.17, -37.84 53.66 0.56 1
3 05/05/2025 15:07:35 -70.07, 129.65 126.46 05/05/2025 15:06:22 -70.06, 129.63 126.47 1.80 73
4 05/08/2025 05:43:06 -70.26, -89.50 126.98 05/08/2025 05:43:51 -70.28, -89.45 126.97 2.77 45
5 05/08/2025 06:33:50 70.16, 77.97 52.90 05/08/2025 06:33:18 70.17, 78.04 52.92 3.29 32
6 05/10/2025 21:09:32 70.89,-142.07 52.97 05/10/2025 21:10:40 70.79,-140.43 52.84 60.58 68
7 05/10/2025 22:00:03 -70.20, 26.36 127.76 05/10/2025 22:00:19 -70.19, 26.31 127.77 2.14 16
8 05/10/2025 22:50:47 70.10,-166.18 52.14 05/10/2025 22:49:46 70.08,-166.20 52.12 2.48 61
9 05/13/2025 13:26:18 70.26, -25.29 51.65 05/13/2025 13:27:15 70.28, -25.30 51.67 2.36 57
10 05/13/2025 14:17:01 -70.20, 142.13 128.43 05/13/2025 14:16:45 -70.18, 142.18 128.45 2.92 16
11 05/13/2025 15:07:31 69.36, -49.32 50.71 05/13/2025 15:06:23 69.46, -51.17 50.85 73.27 68
12 05/16/2025 05:43:15 70.23, 90.54 50.98 05/16/2025 05:43:41 70.23, 90.51 50.98 1.24 26
13 05/16/2025 06:33:58 -70.15,-102.03 129.11 05/16/2025 06:33:11 -70.13,-102.00 129.13 3.34 47

Figure of NPP and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 5/3/2025
SNOs_Map_NPP_LANDSAT-9_20250503.jpg

Download SNOs between NPP and LANDSAT-9 since TLE EPOCH: 05/03/2025 in txt file.

Historial Predications of SNOs between NPP and LANDSAT-9