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: 9/22/2025
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 09/23/2025 04:40:09 74.32, 98.25 74.64 09/23/2025 04:40:21 74.30, 98.18 74.62 2.79 12
2 09/23/2025 05:30:51 -74.24, -94.22 105.45 09/23/2025 05:29:43 -74.25, -94.29 105.42 2.28 68
3 09/25/2025 14:11:16 74.96, -46.20 76.27 09/25/2025 14:12:22 74.88, -43.55 76.06 77.24 66
4 09/25/2025 15:01:47 -74.35, 122.78 104.41 09/25/2025 15:01:53 -74.36, 122.87 104.40 2.92 6
5 09/25/2025 15:52:27 74.04, -69.14 75.28 09/25/2025 15:51:15 74.11, -70.02 75.40 27.64 72
6 09/28/2025 00:32:49 -74.75, -21.01 103.04 09/28/2025 00:33:59 -74.65, -19.56 103.22 44.23 70
7 09/28/2025 01:23:27 74.35, 147.35 76.54 09/28/2025 01:23:22 74.34, 147.42 76.53 2.26 5
8 09/28/2025 02:14:00 -73.83, -44.03 104.02 09/28/2025 02:12:51 -73.92, -45.86 103.83 57.52 69
9 09/30/2025 10:54:22 74.42, 4.44 77.54 09/30/2025 10:55:32 74.39, 4.43 77.50 3.36 70
10 09/30/2025 11:45:04 -74.34, 171.97 102.54 09/30/2025 11:44:54 -74.33, 171.96 102.54 0.90 10
11 10/02/2025 21:15:59 -74.42, 29.05 101.54 10/02/2025 21:17:03 -74.40, 29.02 101.56 1.91 64
12 10/02/2025 22:06:44 74.36,-163.49 78.42 10/02/2025 22:06:21 74.36,-163.39 78.42 2.93 23
13 10/05/2025 07:37:38 74.40, 53.70 79.37 10/05/2025 07:38:30 74.40, 53.60 79.37 2.90 52
14 10/05/2025 08:28:21 -74.36,-138.89 100.66 10/05/2025 08:27:52 -74.34,-138.88 100.68 2.93 29

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 9/22/2025
SNOs_Map_NOAA-21_TERRA_20250923.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 09/22/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA