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: 9/23/2025
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 09/25/2025 14:11:16 74.94, -46.15 76.25 09/25/2025 14:12:23 74.86, -43.61 76.04 74.06 67
2 09/25/2025 15:01:47 -74.33, 122.83 104.43 09/25/2025 15:01:54 -74.33, 122.81 104.42 0.93 7
3 09/25/2025 15:52:27 74.02, -69.10 75.26 09/25/2025 15:51:16 74.08, -70.08 75.38 30.67 71
4 09/28/2025 00:32:50 -74.78, -21.11 103.00 09/28/2025 00:33:59 -74.67, -19.50 103.20 48.86 69
5 09/28/2025 01:23:27 74.34, 147.38 76.53 09/28/2025 01:23:23 74.32, 147.36 76.51 2.44 4
6 09/28/2025 02:14:01 -73.87, -44.12 103.98 09/28/2025 02:12:52 -73.90, -45.92 103.86 55.81 69
7 09/30/2025 10:54:22 74.42, 4.46 77.54 09/30/2025 10:55:32 74.42, 4.49 77.52 0.89 70
8 09/30/2025 11:45:04 -74.34, 171.99 102.54 09/30/2025 11:44:54 -74.36, 172.01 102.52 2.41 10
9 10/02/2025 21:15:58 -74.42, 29.04 101.53 10/02/2025 21:17:02 -74.42, 29.07 101.54 0.87 64
10 10/02/2025 22:06:42 74.32,-163.38 78.37 10/02/2025 22:06:21 74.33,-163.46 78.39 3.03 21
11 10/05/2025 07:37:37 74.41, 53.66 79.39 10/05/2025 07:38:29 74.42, 53.64 79.39 0.54 52
12 10/05/2025 08:28:19 -74.33,-138.82 100.69 10/05/2025 08:27:51 -74.35,-138.84 100.66 2.27 28
13 10/07/2025 17:59:14 -74.44, 78.20 99.67 10/07/2025 17:59:58 -74.45, 78.30 99.66 3.75 44
14 10/07/2025 18:49:58 74.33,-114.22 80.24 10/07/2025 18:49:17 74.37,-114.22 80.28 3.80 41

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 9/23/2025
SNOs_Map_NOAA-21_TERRA_20250924.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 09/23/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA