Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-21 and TERRA Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/22/2025
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (TERRA) Time (TERRA) Lat,Lon (TERRA) SZA (TERRA ) Distance(km) Time Diff (sec)
1 10/22/2025 07:18:13 74.51, 58.25 85.76 10/22/2025 07:19:05 74.51, 58.31 85.74 2.04 52
2 10/22/2025 08:08:55 -74.45,-134.26 94.31 10/22/2025 08:08:26 -74.44,-134.19 94.32 2.47 29
3 10/24/2025 17:39:48 -74.51, 82.87 93.41 10/24/2025 17:40:29 -74.50, 82.90 93.42 1.26 41
4 10/24/2025 18:30:33 74.45,-109.66 86.54 10/24/2025 18:29:49 74.41,-109.64 86.51 3.63 44
5 10/27/2025 04:01:26 74.52, 107.44 87.43 10/27/2025 04:01:51 74.50, 107.51 87.41 2.78 25
6 10/27/2025 04:52:08 -74.44, -85.05 92.64 10/27/2025 04:51:12 -74.43, -85.00 92.65 2.33 56
7 10/29/2025 14:23:00 -74.47, 132.16 91.81 10/29/2025 14:23:14 -74.48, 132.07 91.80 3.16 14
8 10/29/2025 15:13:45 74.42, -60.38 88.14 10/29/2025 15:12:34 74.40, -60.46 88.13 3.37 71
9 10/31/2025 23:54:01 -74.94, -11.83 90.52 10/31/2025 23:55:10 -74.82, -10.19 90.72 49.37 69
10 11/01/2025 00:44:38 74.51, 156.67 89.02 11/01/2025 00:44:35 74.48, 156.66 88.98 3.60 3
11 11/01/2025 01:35:11 -73.98, -34.67 91.54 11/01/2025 01:34:02 -74.08, -36.56 91.36 58.73 69
12 11/03/2025 10:15:30 74.56, 13.83 89.83 11/03/2025 10:16:35 74.57, 13.83 89.83 2.03 65
13 11/03/2025 11:06:13 -74.52,-178.74 90.21 11/03/2025 11:05:56 -74.49,-178.69 90.24 2.81 17

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 10/22/2025
SNOs_Map_NOAA-21_TERRA_20251022.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 10/22/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA