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: 8/5/2025
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 12:23:17 69.80, -8.55 55.87 08/15/2025 12:24:24 69.76, -6.34 55.79 85.04 67
2 08/15/2025 13:13:52 -69.35, 159.41 124.58 08/15/2025 13:15:03 -69.29, 160.36 124.67 37.64 71
3 08/15/2025 14:04:31 68.95, -32.72 55.02 08/15/2025 14:05:36 68.95, -32.72 55.01 0.23 65
4 08/15/2025 14:55:14 -68.94, 134.63 124.99 08/15/2025 14:56:07 -68.91, 134.60 125.02 2.54 53
5 08/15/2025 15:46:00 68.91, -58.03 54.99 08/15/2025 15:46:34 68.90, -58.03 54.98 0.90 34
6 08/15/2025 16:36:43 -68.89, 109.32 125.02 08/15/2025 16:37:04 -68.91, 109.36 125.00 3.12 21
7 08/15/2025 17:27:29 68.86, -83.34 54.97 08/15/2025 17:27:32 68.84, -83.35 54.95 1.98 3
8 08/15/2025 18:18:12 -68.84, 84.01 125.05 08/15/2025 18:18:02 -68.86, 84.05 125.03 2.24 10
9 08/15/2025 19:08:58 68.81,-108.65 54.94 08/15/2025 19:08:30 68.78,-108.66 54.91 3.06 28
10 08/15/2025 19:59:41 -68.79, 58.70 125.07 08/15/2025 19:59:00 -68.80, 58.73 125.07 1.61 41
11 08/15/2025 20:50:27 68.76,-133.96 54.91 08/15/2025 20:49:27 68.78,-133.90 54.93 2.99 60
12 08/15/2025 21:41:10 -68.75, 33.39 125.10 08/15/2025 21:39:58 -68.74, 33.42 125.10 1.57 72
13 08/15/2025 22:31:45 68.13,-158.50 54.28 08/15/2025 22:30:35 68.18,-159.91 54.37 59.01 70

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 8/5/2025
SNOs_Map_NPP_GCOM-C_20250805.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 08/05/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C