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: 10/27/2025
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 10/27/2025 04:01:26 74.48, 107.53 87.40 10/27/2025 04:01:52 74.49, 107.48 87.40 1.77 26
2 10/27/2025 04:52:08 -74.41, -84.97 92.67 10/27/2025 04:51:13 -74.41, -85.04 92.67 2.19 55
3 10/29/2025 14:23:00 -74.49, 132.12 91.80 10/29/2025 14:23:14 -74.48, 132.04 91.81 2.72 14
4 10/29/2025 15:13:45 74.43, -60.41 88.16 10/29/2025 15:12:33 74.45, -60.35 88.18 2.67 72
5 10/31/2025 23:54:01 -74.95, -11.87 90.51 10/31/2025 23:55:10 -74.82, -10.19 90.71 50.83 69
6 11/01/2025 00:44:37 74.47, 156.77 88.97 11/01/2025 00:44:35 74.48, 156.67 88.99 3.54 2
7 11/01/2025 01:35:11 -74.00, -34.71 91.53 11/01/2025 01:34:02 -74.09, -36.56 91.36 57.37 69
8 11/03/2025 10:15:30 74.56, 13.81 89.83 11/03/2025 10:16:36 74.55, 13.76 89.81 2.44 66
9 11/03/2025 11:06:13 -74.53,-178.77 90.20 11/03/2025 11:05:56 -74.51,-178.65 90.22 3.84 17
10 11/05/2025 20:37:05 -74.57, 38.39 89.42 11/05/2025 20:37:57 -74.55, 38.37 89.45 3.06 52
11 11/05/2025 21:27:49 74.48,-154.05 90.50 11/05/2025 21:27:17 74.46,-154.15 90.49 3.37 32
12 11/08/2025 06:58:42 74.59, 62.95 91.32 11/08/2025 06:59:16 74.57, 63.05 91.29 3.50 34
13 11/08/2025 07:49:24 -74.49,-129.48 88.78 11/08/2025 07:48:37 -74.49,-129.48 88.78 0.60 47

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 10/27/2025
SNOs_Map_NOAA-21_TERRA_20251027.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 10/27/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA