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: 4/14/2025
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 04/20/2025 19:01:50 69.66,-108.37 57.77 04/20/2025 19:02:59 69.62,-106.83 57.71 59.82 69
2 04/20/2025 19:52:25 -69.21, 59.60 122.71 04/20/2025 19:53:38 -69.14, 59.88 122.78 13.13 73
3 04/20/2025 20:43:08 69.02,-132.83 57.09 04/20/2025 20:44:07 69.03,-132.89 57.10 2.55 59
4 04/20/2025 21:33:52 -69.05, 34.45 122.89 04/20/2025 21:34:37 -69.04, 34.50 122.91 2.16 45
5 04/20/2025 22:24:37 68.97,-158.13 57.02 04/20/2025 22:25:05 68.97,-158.20 57.02 2.93 28
6 04/20/2025 23:15:21 -68.99, 9.15 122.97 04/20/2025 23:15:35 -68.99, 9.19 122.98 1.79 14
7 04/21/2025 00:06:07 68.97, 176.50 56.99 04/21/2025 00:06:02 68.98, 176.56 57.00 2.78 5
8 04/21/2025 00:56:50 -68.94, -16.15 123.05 04/21/2025 00:56:33 -68.93, -16.12 123.06 1.43 17
9 04/21/2025 01:47:36 68.91, 151.19 56.91 04/21/2025 01:47:00 68.92, 151.25 56.92 2.53 36
10 04/21/2025 02:38:19 -68.89, -41.45 123.13 04/21/2025 02:37:31 -68.88, -41.43 123.14 1.10 48
11 04/21/2025 03:29:05 68.86, 125.89 56.83 04/21/2025 03:27:58 68.87, 125.94 56.85 2.33 67
12 04/21/2025 04:19:45 -68.67, -66.54 123.37 04/21/2025 04:18:31 -68.72, -66.88 123.32 14.88 74
13 04/21/2025 05:10:19 68.00, 101.64 55.94 04/21/2025 05:09:11 68.00, 99.59 55.97 85.63 68

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 4/14/2025
SNOs_Map_NPP_GCOM-C_20250414.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 04/14/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C