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: 6/7/2025
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 06/11/2025 16:05:09 69.86, -64.32 46.65 06/11/2025 16:06:16 69.81, -62.09 46.57 85.75 67
2 06/11/2025 16:55:44 -69.37, 103.71 133.86 06/11/2025 16:56:56 -69.27, 104.51 133.97 33.50 72
3 06/11/2025 17:46:23 69.01, -88.47 45.77 06/11/2025 17:47:28 69.01, -88.46 45.77 0.48 65
4 06/11/2025 18:37:07 -69.00, 78.85 134.24 06/11/2025 18:37:58 -69.00, 78.91 134.24 2.22 51
5 06/11/2025 19:27:52 68.96,-113.78 45.72 06/11/2025 19:28:26 68.96,-113.77 45.71 0.37 34
6 06/11/2025 20:18:36 -68.95, 53.54 134.29 06/11/2025 20:18:56 -68.95, 53.60 134.30 2.14 20
7 06/11/2025 21:09:21 68.91,-139.09 45.66 06/11/2025 21:09:24 68.91,-139.08 45.66 0.38 3
8 06/11/2025 22:00:05 -68.90, 28.24 134.35 06/11/2025 21:59:54 -68.90, 28.29 134.35 2.10 11
9 06/11/2025 22:50:50 68.86,-164.39 45.61 06/11/2025 22:50:22 68.85,-164.39 45.60 0.48 28
10 06/11/2025 23:41:34 -68.85, 2.93 134.41 06/11/2025 23:40:52 -68.85, 2.98 134.41 2.10 42
11 06/12/2025 00:32:19 68.81, 170.30 45.55 06/12/2025 00:31:20 68.80, 170.31 45.55 0.63 59
12 06/12/2025 01:23:03 -68.80, -22.37 134.46 06/12/2025 01:21:50 -68.80, -22.32 134.46 2.13 73
13 06/12/2025 02:13:38 68.22, 145.70 44.95 06/12/2025 02:12:28 68.21, 144.30 44.96 57.93 70

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 6/7/2025
SNOs_Map_NPP_GCOM-C_20250607.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 06/07/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C