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: 10/2/2025
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 10/02/2025 21:15:58 -74.43, 29.02 101.52 10/02/2025 21:17:01 -74.43, 29.09 101.54 2.12 63
2 10/02/2025 22:06:43 74.37,-163.50 78.43 10/02/2025 22:06:20 74.35,-163.42 78.41 2.94 23
3 10/05/2025 07:37:37 74.42, 53.63 79.40 10/05/2025 07:38:27 74.45, 53.71 79.41 3.37 50
4 10/05/2025 08:28:19 -74.35,-138.86 100.67 10/05/2025 08:27:49 -74.37,-138.80 100.65 2.79 30
5 10/07/2025 17:59:13 -74.42, 78.25 99.69 10/07/2025 17:59:56 -74.42, 78.22 99.70 0.80 43
6 10/07/2025 18:49:58 74.35,-114.28 80.26 10/07/2025 18:49:15 74.34,-114.29 80.25 2.07 43
7 10/10/2025 04:20:52 74.43, 102.79 81.25 10/10/2025 04:21:20 74.44, 102.88 81.25 2.54 28
8 10/10/2025 05:11:34 -74.36, -89.69 98.82 10/10/2025 05:10:42 -74.36, -89.65 98.81 1.40 52
9 10/12/2025 14:42:27 -74.40, 127.48 97.88 10/12/2025 14:42:47 -74.42, 127.41 97.87 2.83 20
10 10/12/2025 15:33:12 74.34, -65.05 82.07 10/12/2025 15:32:06 74.34, -65.09 82.08 1.24 66
11 10/15/2025 00:13:35 -75.17, -17.37 96.14 10/15/2025 00:14:40 -75.04, -14.15 96.41 93.22 65
12 10/15/2025 01:04:05 74.40, 152.09 83.02 10/15/2025 01:04:10 74.40, 151.98 83.03 3.35 5

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 10/2/2025
SNOs_Map_NOAA-21_TERRA_20251002.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 10/02/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA