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: 11/1/2025
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 11/03/2025 10:15:30 74.55, 13.84 89.82 11/03/2025 10:16:36 74.57, 13.81 89.83 2.66 66
2 11/03/2025 11:06:12 -74.47,-178.63 90.26 11/03/2025 11:05:57 -74.48,-178.74 90.25 3.34 15
3 11/05/2025 20:37:05 -74.56, 38.41 89.43 11/05/2025 20:37:57 -74.57, 38.43 89.43 1.26 52
4 11/05/2025 21:27:50 74.52,-154.15 90.53 11/05/2025 21:27:17 74.50,-154.07 90.52 2.74 33
5 11/08/2025 06:58:42 74.57, 62.99 91.30 11/08/2025 06:59:17 74.57, 63.03 91.29 1.32 35
6 11/08/2025 07:49:24 -74.48,-129.45 88.79 11/08/2025 07:48:38 -74.48,-129.51 88.79 1.84 46
7 11/10/2025 17:20:17 -74.59, 87.55 88.00 11/10/2025 17:20:37 -74.57, 87.66 88.02 3.49 20
8 11/10/2025 18:11:00 74.50,-104.91 91.93 11/10/2025 18:09:56 74.50,-104.85 91.93 1.80 64
9 11/13/2025 02:51:20 -75.23, -56.95 86.64 11/13/2025 02:52:26 -75.11, -54.08 86.88 82.81 66
10 11/13/2025 03:41:52 74.57, 112.20 92.66 11/13/2025 03:41:55 74.57, 112.26 92.64 2.06 3
11 11/13/2025 04:32:30 -74.28, -79.71 87.66 11/13/2025 04:31:18 -74.38, -80.52 87.53 26.53 72
12 11/15/2025 13:12:43 74.60, -30.59 93.31 11/15/2025 13:13:54 74.61, -30.69 93.31 3.04 71
13 11/15/2025 14:03:26 -74.54, 136.89 86.75 11/15/2025 14:03:14 -74.58, 136.90 86.72 3.70 12

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 11/1/2025
SNOs_Map_NOAA-21_TERRA_20251102.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 11/01/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA