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: 9/8/2025
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 09/11/2025 00:51:54 -74.32, -24.66 110.01 09/11/2025 00:52:41 -74.29, -24.67 110.04 2.75 47
2 09/11/2025 01:42:38 74.23, 142.86 69.92 09/11/2025 01:41:59 74.25, 142.92 69.94 2.62 39
3 09/13/2025 11:13:34 74.31, -0.08 70.91 09/13/2025 11:14:12 74.31, -0.05 70.90 0.94 38
4 09/13/2025 12:04:16 -74.21, 167.50 109.19 09/13/2025 12:03:35 -74.21, 167.39 109.18 3.42 41
5 09/15/2025 21:35:11 -74.30, 24.55 108.18 09/15/2025 21:35:46 -74.31, 24.51 108.18 1.81 35
6 09/15/2025 22:25:56 74.26,-168.04 71.79 09/15/2025 22:25:04 74.26,-167.93 71.80 3.54 52
7 09/18/2025 07:56:51 74.31, 49.12 72.76 09/18/2025 07:57:17 74.29, 49.03 72.74 3.12 26
8 09/18/2025 08:47:34 -74.26,-143.44 107.29 09/18/2025 08:46:39 -74.25,-143.40 107.29 1.31 55
9 09/20/2025 18:18:29 -74.31, 73.71 106.32 09/20/2025 18:18:51 -74.31, 73.63 106.32 2.34 22

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 9/8/2025
SNOs_Map_NOAA-21_TERRA_20250909.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 09/08/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA