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: 9/25/2025
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 10/06/2025 06:54:51 -69.69,-106.11 105.18 10/06/2025 06:55:59 -69.64,-104.19 105.21 74.73 68
2 10/06/2025 07:45:25 69.07, 62.08 74.22 10/06/2025 07:46:37 69.05, 62.37 74.21 11.83 72
3 10/06/2025 08:36:07 -68.95,-130.43 105.89 10/06/2025 08:37:09 -68.94,-130.40 105.89 1.45 62
4 10/06/2025 09:26:52 68.91, 36.93 74.09 10/06/2025 09:27:37 68.89, 36.91 74.07 2.83 45
5 10/06/2025 10:17:36 -68.89,-155.73 105.92 10/06/2025 10:18:07 -68.89,-155.71 105.92 1.22 31
6 10/06/2025 11:08:21 68.86, 11.63 74.06 10/06/2025 11:08:35 68.83, 11.60 74.04 3.10 14
7 10/06/2025 11:59:05 -68.84, 178.97 105.94 10/06/2025 11:59:05 -68.83, 178.98 105.95 1.12 0
8 10/06/2025 12:49:50 68.80, -13.68 74.04 10/06/2025 12:49:32 68.83, -13.63 74.06 3.29 18
9 10/06/2025 13:40:34 -68.79, 153.66 105.97 10/06/2025 13:40:03 -68.78, 153.67 105.98 1.14 31
10 10/06/2025 14:31:19 68.75, -38.98 74.01 10/06/2025 14:30:30 68.77, -38.94 74.03 2.97 49
11 10/06/2025 15:22:03 -68.73, 128.36 105.99 10/06/2025 15:21:01 -68.72, 128.36 106.01 1.28 62
12 10/06/2025 16:12:45 68.54, -64.07 73.83 10/06/2025 16:11:32 68.50, -64.54 73.79 19.57 73
13 10/06/2025 17:03:20 -68.04, 103.89 106.65 10/06/2025 17:02:10 -68.07, 102.29 106.64 66.74 70

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 9/25/2025
SNOs_Map_NPP_GCOM-C_20250926.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 09/25/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C