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: 11/13/2025
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 11/15/2025 13:13:27 74.59, -30.75 93.30 11/15/2025 13:13:53 74.57, -30.79 93.27 3.16 26
2 11/15/2025 14:04:09 -74.50, 136.83 86.80 11/15/2025 14:03:13 -74.52, 136.76 86.77 3.12 56
3 11/17/2025 22:44:34 74.95,-174.49 94.29 11/17/2025 22:45:44 74.85,-173.14 94.12 40.59 70
4 11/17/2025 23:35:10 -74.56, -6.10 86.14 11/17/2025 23:35:09 -74.55, -6.21 86.15 3.59 1
5 11/18/2025 00:25:44 73.98, 162.71 93.24 11/18/2025 00:24:37 74.06, 160.34 93.42 72.97 67
6 11/20/2025 09:06:12 -74.64,-149.05 85.50 11/20/2025 09:07:04 -74.63,-149.05 85.51 0.75 52
7 11/20/2025 09:56:56 74.55, 18.49 94.42 11/20/2025 09:56:24 74.55, 18.44 94.43 1.55 32
8 11/22/2025 19:27:57 74.60,-124.39 95.00 11/22/2025 19:28:18 74.63,-124.41 95.03 3.41 21
9 11/22/2025 20:18:40 -74.54, 43.10 85.07 11/22/2025 20:17:39 -74.54, 43.05 85.05 1.76 61
10 11/25/2025 04:59:00 74.76, 92.43 95.66 11/25/2025 05:00:11 74.71, 92.76 95.59 10.81 71
11 11/25/2025 05:49:41 -74.59, -99.79 84.52 11/25/2025 05:49:33 -74.58, -99.90 84.53 3.57 8
12 11/27/2025 15:20:42 -74.66, 117.28 83.99 11/27/2025 15:21:25 -74.66, 117.28 84.00 0.35 43
13 11/27/2025 16:11:26 74.59, -75.23 95.94 11/27/2025 16:10:44 74.61, -75.16 95.97 3.22 42

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 11/13/2025
SNOs_Map_NOAA-21_TERRA_20251114.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 11/13/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA