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: 9/27/2025
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 09/28/2025 00:32:50 -74.79, -21.14 102.99 09/28/2025 00:33:59 -74.66, -19.52 103.20 49.43 69
2 09/28/2025 01:23:27 74.34, 147.37 76.53 09/28/2025 01:23:23 74.32, 147.35 76.51 3.15 4
3 09/28/2025 02:14:01 -73.88, -44.14 103.97 09/28/2025 02:12:51 -73.94, -45.83 103.82 52.58 70
4 09/30/2025 10:54:22 74.42, 4.45 77.54 09/30/2025 10:55:32 74.41, 4.48 77.52 1.24 70
5 09/30/2025 11:45:04 -74.35, 171.96 102.53 09/30/2025 11:44:54 -74.35, 171.99 102.53 0.78 10
6 10/02/2025 21:15:59 -74.43, 29.02 101.52 10/02/2025 21:17:03 -74.41, 29.04 101.56 2.50 64
7 10/02/2025 22:06:43 74.32,-163.39 78.38 10/02/2025 22:06:22 74.32,-163.48 78.38 2.91 21
8 10/05/2025 07:37:37 74.42, 53.64 79.40 10/05/2025 07:38:29 74.40, 53.61 79.37 1.79 52
9 10/05/2025 08:28:19 -74.34,-138.84 100.68 10/05/2025 08:27:51 -74.34,-138.88 100.68 1.52 28
10 10/07/2025 17:59:14 -74.45, 78.17 99.65 10/07/2025 17:59:58 -74.43, 78.25 99.68 2.82 44
11 10/07/2025 18:49:58 74.34,-114.24 80.24 10/07/2025 18:49:17 74.35,-114.27 80.26 1.42 41
12 10/10/2025 04:20:52 74.40, 102.87 81.22 10/10/2025 04:21:24 74.41, 102.80 81.23 2.54 32
13 10/10/2025 05:11:34 -74.32, -89.60 98.86 10/10/2025 05:10:46 -74.34, -89.71 98.84 3.55 48

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 9/27/2025
SNOs_Map_NOAA-21_TERRA_20250928.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 09/27/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA