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: 4/15/2025
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 04/20/2025 19:01:49 69.63,-108.32 57.74 04/20/2025 19:02:59 69.59,-106.87 57.68 56.46 70
2 04/20/2025 19:52:24 -69.18, 59.65 122.74 04/20/2025 19:53:38 -69.11, 59.84 122.81 10.35 74
3 04/20/2025 20:43:08 69.04,-132.86 57.12 04/20/2025 20:44:06 69.05,-132.86 57.12 1.00 58
4 04/20/2025 21:33:51 -69.02, 34.49 122.93 04/20/2025 21:34:37 -69.01, 34.46 122.94 1.77 46
5 04/20/2025 22:24:37 68.99,-158.16 57.04 04/20/2025 22:25:04 69.00,-158.17 57.04 1.19 27
6 04/20/2025 23:15:20 -68.96, 9.19 123.01 04/20/2025 23:15:35 -68.96, 9.15 123.01 2.00 15
7 04/21/2025 00:06:06 68.93, 176.54 56.96 04/21/2025 00:06:02 68.95, 176.52 56.97 1.46 4
8 04/21/2025 00:56:49 -68.91, -16.11 123.09 04/21/2025 00:56:33 -68.90, -16.16 123.09 2.24 16
9 04/21/2025 01:47:35 68.88, 151.24 56.88 04/21/2025 01:47:00 68.89, 151.21 56.89 1.74 35
10 04/21/2025 02:38:18 -68.85, -41.41 123.16 04/21/2025 02:37:31 -68.85, -41.47 123.17 2.48 47
11 04/21/2025 03:29:04 68.83, 125.94 56.80 04/21/2025 03:27:58 68.84, 125.91 56.82 2.03 66
12 04/21/2025 04:19:45 -68.69, -66.56 123.35 04/21/2025 04:18:31 -68.69, -66.92 123.35 14.31 74
13 04/21/2025 05:10:18 67.97, 101.69 55.90 04/21/2025 05:09:11 67.98, 99.55 55.94 88.98 67

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 4/15/2025
SNOs_Map_NPP_GCOM-C_20250415.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 04/15/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C