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: 5/11/2025
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 05/12/2025 10:47:21 -73.73,-172.11 124.37 05/12/2025 10:47:35 -73.76,-172.07 124.36 3.26 14
2 05/12/2025 11:38:05 73.63, -4.57 55.51 05/12/2025 11:36:55 73.63, -4.66 55.53 2.75 70
3 05/14/2025 21:09:06 73.77,-147.63 55.08 05/14/2025 21:09:24 73.75,-147.59 55.05 2.63 18
4 05/14/2025 21:59:48 -73.67, 19.91 125.04 05/14/2025 21:58:47 -73.65, 19.87 125.04 2.25 61
5 05/17/2025 07:30:48 -73.76,-123.04 125.49 05/17/2025 07:31:16 -73.75,-123.09 125.50 1.42 28
6 05/17/2025 08:21:32 73.66, 44.50 54.39 05/17/2025 08:20:35 73.66, 44.40 54.42 3.23 57
7 05/19/2025 17:52:33 73.80, -98.58 54.04 05/19/2025 17:53:03 73.79, -98.50 54.02 2.62 30
8 05/19/2025 18:43:15 -73.71, 68.96 126.08 05/19/2025 18:42:26 -73.71, 68.98 126.07 0.79 49
9 05/22/2025 04:14:15 -73.80, -74.01 126.45 05/22/2025 04:14:54 -73.82, -73.95 126.45 2.70 39
10 05/22/2025 05:04:59 73.70, 93.54 53.43 05/22/2025 05:04:13 73.72, 93.52 53.46 2.33 46
11 05/24/2025 14:35:59 73.80, -49.45 53.10 05/24/2025 14:36:41 73.81, -49.47 53.09 0.89 42
12 05/24/2025 15:26:41 -73.71, 118.09 127.02 05/24/2025 15:26:04 -73.73, 118.03 126.99 3.17 37

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 5/11/2025
SNOs_Map_NOAA-21_TERRA_20250511.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 05/11/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA