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: 5/16/2025
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 05/17/2025 07:30:48 -73.77,-123.07 125.48 05/17/2025 07:31:16 -73.74,-123.11 125.51 2.88 28
2 05/17/2025 08:21:32 73.66, 44.49 54.40 05/17/2025 08:20:35 73.66, 44.40 54.42 3.01 57
3 05/19/2025 17:52:33 73.81, -98.59 54.04 05/19/2025 17:53:03 73.80, -98.50 54.02 3.24 30
4 05/19/2025 18:43:15 -73.72, 68.94 126.07 05/19/2025 18:42:26 -73.71, 68.97 126.07 1.63 49
5 05/22/2025 04:14:15 -73.82, -74.04 126.44 05/22/2025 04:14:54 -73.82, -73.95 126.45 3.08 39
6 05/22/2025 05:04:59 73.71, 93.52 53.44 05/22/2025 05:04:13 73.73, 93.53 53.47 2.44 46
7 05/24/2025 14:35:59 73.82, -49.47 53.11 05/24/2025 14:36:41 73.83, -49.43 53.11 1.90 42
8 05/24/2025 15:26:41 -73.73, 118.06 127.00 05/24/2025 15:26:04 -73.75, 118.05 126.98 2.27 37
9 05/27/2025 00:57:41 -73.84, -24.94 127.29 05/27/2025 00:58:32 -73.83, -24.94 127.31 0.97 51
10 05/27/2025 01:48:25 73.73, 142.62 52.59 05/27/2025 01:47:51 73.73, 142.52 52.60 3.07 34
11 05/29/2025 11:19:24 73.84, -0.40 52.34 05/29/2025 11:20:17 73.84, -0.41 52.32 0.52 53
12 05/29/2025 12:10:06 -73.75, 167.13 127.77 05/29/2025 12:09:40 -73.76, 167.09 127.76 1.65 26

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 5/16/2025
SNOs_Map_NOAA-21_TERRA_20250516.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 05/16/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA