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: 11/15/2025
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 11/27/2025 03:57:45 -69.64, -61.55 89.32 11/27/2025 03:58:54 -69.61, -59.76 89.32 69.24 69
2 11/27/2025 04:48:20 69.02, 106.63 90.09 11/27/2025 04:49:32 69.01, 106.79 90.08 6.39 72
3 11/27/2025 05:39:02 -68.95, -85.95 89.98 11/27/2025 05:40:03 -68.97, -85.90 89.97 2.51 61
4 11/27/2025 06:29:48 68.92, 81.40 90.00 11/27/2025 06:30:31 68.90, 81.41 89.98 2.04 43
5 11/27/2025 07:20:31 -68.90,-111.26 90.02 11/27/2025 07:21:01 -68.91,-111.21 90.01 2.01 30
6 11/27/2025 08:11:17 68.87, 56.09 89.96 11/27/2025 08:11:29 68.85, 56.09 89.94 2.92 12
7 11/27/2025 09:02:00 -68.86,-136.57 90.05 11/27/2025 09:01:59 -68.85,-136.52 90.05 1.85 1
8 11/27/2025 09:52:45 68.77, 30.85 89.88 11/27/2025 09:52:27 68.79, 30.78 89.89 3.53 18
9 11/27/2025 10:43:29 -68.81,-161.88 90.09 11/27/2025 10:42:57 -68.80,-161.83 90.10 2.12 32
10 11/27/2025 11:34:14 68.73, 5.54 89.84 11/27/2025 11:33:25 68.74, 5.47 89.85 3.13 49
11 11/27/2025 12:24:58 -68.76, 172.81 90.12 11/27/2025 12:23:55 -68.74, 172.86 90.14 2.68 63
12 11/27/2025 13:15:39 68.46, -19.48 89.60 11/27/2025 13:14:27 68.46, -20.12 89.59 26.10 72
13 11/27/2025 14:06:14 -68.02, 148.41 90.84 11/27/2025 14:05:05 -68.04, 146.71 90.84 70.54 69

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 11/15/2025
SNOs_Map_NPP_GCOM-C_20251116.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 11/15/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C