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: 8/15/2025
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 08/15/2025 22:31:46 68.16,-158.54 54.32 08/15/2025 22:30:36 68.14,-159.96 54.33 59.12 70
2 08/28/2025 11:38:46 69.69, 2.78 60.09 08/28/2025 11:39:54 69.63, 4.66 60.00 73.29 68
3 08/28/2025 12:29:21 -69.23, 170.76 120.38 08/28/2025 12:30:33 -69.16, 171.37 120.46 25.33 72
4 08/28/2025 13:20:02 68.95, -21.55 59.35 08/28/2025 13:21:04 68.93, -21.56 59.33 2.58 62
5 08/28/2025 14:10:45 -68.92, 145.82 120.67 08/28/2025 14:11:34 -68.94, 145.83 120.65 2.75 49
6 08/28/2025 15:01:31 68.90, -46.86 59.33 08/28/2025 15:02:01 68.92, -46.80 59.35 3.24 30
7 08/28/2025 15:52:14 -68.87, 120.51 120.70 08/28/2025 15:52:32 -68.88, 120.52 120.68 1.51 18
8 08/28/2025 16:43:00 68.86, -72.17 59.31 08/28/2025 16:42:59 68.87, -72.11 59.32 2.43 1
9 08/28/2025 17:33:43 -68.82, 95.20 120.72 08/28/2025 17:33:30 -68.82, 95.21 120.72 0.41 13
10 08/28/2025 18:24:29 68.81, -97.48 59.29 08/28/2025 18:23:57 68.81, -97.43 59.28 2.17 32
11 08/28/2025 19:15:12 -68.78, 69.89 120.74 08/28/2025 19:14:28 -68.77, 69.89 120.75 1.09 44
12 08/28/2025 20:05:58 68.77,-122.79 59.27 08/28/2025 20:04:55 68.75,-122.74 59.25 2.63 63
13 08/28/2025 20:56:40 -68.68, 44.65 120.82 08/28/2025 20:55:26 -68.71, 44.58 120.78 4.52 74
14 08/28/2025 21:47:14 68.02,-147.19 58.53 08/28/2025 21:46:05 68.04,-148.89 58.58 70.57 69

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 8/15/2025
SNOs_Map_NPP_GCOM-C_20250816.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 08/15/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C