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: 10/17/2025
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 10/19/2025 05:19:59 69.76, 97.56 79.72 10/19/2025 05:21:07 69.67, 99.62 79.67 80.09 68
2 10/19/2025 06:10:34 -69.27, -94.42 100.75 10/19/2025 06:11:46 -69.18, -93.69 100.82 30.71 72
3 10/19/2025 07:01:13 68.91, 73.40 78.91 10/19/2025 07:02:18 68.92, 73.34 78.93 2.89 65
4 10/19/2025 07:51:57 -68.90,-119.28 101.09 10/19/2025 07:52:48 -68.92,-119.29 101.07 1.67 51
5 10/19/2025 08:42:42 68.85, 48.09 78.88 10/19/2025 08:43:16 68.87, 48.03 78.90 3.08 34
6 10/19/2025 09:33:26 -68.85,-144.59 101.11 10/19/2025 09:33:46 -68.87,-144.59 101.09 2.00 20
7 10/19/2025 10:24:11 68.80, 22.79 78.86 10/19/2025 10:24:14 68.82, 22.73 78.88 3.26 3
8 10/19/2025 11:14:55 -68.80,-169.89 101.14 10/19/2025 11:14:44 -68.82,-169.89 101.12 2.33 11
9 10/19/2025 12:05:40 68.75, -2.51 78.83 10/19/2025 12:05:12 68.77, -2.57 78.85 3.46 28
10 10/19/2025 12:56:24 -68.75, 164.80 101.16 10/19/2025 12:55:42 -68.77, 164.80 101.14 2.65 42
11 10/19/2025 13:47:10 68.75, -27.89 78.86 10/19/2025 13:46:10 68.72, -27.88 78.83 3.18 60
12 10/19/2025 14:37:53 -68.70, 139.50 101.19 10/19/2025 14:36:40 -68.72, 139.50 101.17 2.98 73
13 10/19/2025 15:28:28 68.11, -52.42 78.26 10/19/2025 15:27:18 68.13, -53.87 78.25 60.23 70

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 10/17/2025
SNOs_Map_NPP_GCOM-C_20251017.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 10/17/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C