Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NPP and GCOM-C Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 5/1/2025
Index Date (NPP) Time (NPP) Lat,Lon (NPP) SZA (NPP ) Date (GCOM-C) Time (GCOM-C) Lat,Lon (GCOM-C) SZA (GCOM-C ) Distance(km) Time Diff (sec)
1 05/03/2025 17:27:04 -70.00, 94.88 125.99 05/03/2025 17:28:10 -69.94, 97.39 126.08 96.10 66
2 05/03/2025 18:17:38 69.35, -96.86 53.34 05/03/2025 18:18:50 69.25, -96.21 53.23 28.01 72
3 05/03/2025 19:08:16 -69.05, 70.89 126.98 05/03/2025 19:09:24 -69.04, 70.87 127.00 1.49 68
4 05/03/2025 19:59:02 69.03,-121.79 53.00 05/03/2025 19:59:51 69.04,-121.74 53.00 2.01 49
5 05/03/2025 20:49:45 -68.99, 45.58 127.06 05/03/2025 20:50:22 -68.99, 45.57 127.07 1.05 37
6 05/03/2025 21:40:31 68.98,-147.09 52.92 05/03/2025 21:40:49 68.99,-147.04 52.93 2.20 18
7 05/03/2025 22:31:14 -68.94, 20.28 127.13 05/03/2025 22:31:20 -68.94, 20.26 127.13 0.76 6
8 05/03/2025 23:22:00 68.93,-172.39 52.85 05/03/2025 23:21:47 68.94,-172.34 52.86 2.51 13
9 05/04/2025 00:12:43 -68.89, -5.02 127.20 05/04/2025 00:12:18 -68.89, -5.04 127.20 0.78 25
10 05/04/2025 01:03:29 68.88, 162.31 52.78 05/04/2025 01:02:45 68.90, 162.35 52.80 2.90 44
11 05/04/2025 01:54:12 -68.84, -30.32 127.28 05/04/2025 01:53:16 -68.84, -30.34 127.27 1.10 56
12 05/04/2025 02:44:58 68.82, 137.00 52.70 05/04/2025 02:43:43 68.85, 137.05 52.73 3.34 75
13 05/04/2025 03:35:33 -68.36, -55.06 127.78 05/04/2025 03:34:22 -68.37, -56.21 127.76 46.99 71

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 5/1/2025
SNOs_Map_NPP_GCOM-C_20250502.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 05/01/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C