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: 4/11/2025
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 69.63,-108.33 57.74 04/20/2025 19:03:00 69.58,-106.88 57.67 56.25 70
2 04/20/2025 19:52:25 -69.18, 59.65 122.74 04/20/2025 19:53:38 -69.16, 59.90 122.76 10.31 73
3 04/20/2025 20:43:09 69.05,-132.86 57.12 04/20/2025 20:44:07 69.04,-132.87 57.11 0.86 58
4 04/20/2025 21:33:52 -69.02, 34.50 122.93 04/20/2025 21:34:38 -69.00, 34.45 122.95 2.61 46
5 04/20/2025 22:24:37 68.99,-158.16 57.04 04/20/2025 22:25:04 68.99,-158.18 57.03 0.97 27
6 04/20/2025 23:15:20 -68.96, 9.20 123.01 04/20/2025 23:15:35 -68.95, 9.14 123.02 2.77 15
7 04/21/2025 00:06:06 68.94, 176.54 56.96 04/21/2025 00:06:02 68.93, 176.51 56.96 1.19 4
8 04/21/2025 00:56:49 -68.91, -16.10 123.09 04/21/2025 00:56:33 -68.90, -16.17 123.10 2.95 16
9 04/21/2025 01:47:35 68.88, 151.23 56.88 04/21/2025 01:47:00 68.88, 151.20 56.88 1.45 35
10 04/21/2025 02:38:18 -68.85, -41.41 123.16 04/21/2025 02:37:31 -68.84, -41.48 123.17 3.14 47
11 04/21/2025 03:29:04 68.83, 125.93 56.80 04/21/2025 03:27:58 68.83, 125.89 56.80 1.72 66
12 04/21/2025 04:19:45 -68.69, -66.56 123.35 04/21/2025 04:18:31 -68.68, -66.93 123.36 14.79 74
13 04/21/2025 05:10:18 67.97, 101.68 55.91 04/21/2025 05:09:11 67.96, 99.54 55.93 89.40 67

Figure of NPP and GCOM-C satellite orbits during SNOs since TLE Epoch: 4/11/2025
SNOs_Map_NPP_GCOM-C_20250411.jpg

Download SNOs between NPP and GCOM-C since TLE EPOCH: 04/11/2025 in txt file.

Historial Predications of SNOs between NPP and GCOM-C