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: 5/21/2025
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 05/22/2025 04:14:14 -73.80, -74.01 126.46 05/22/2025 04:14:54 -73.78, -74.04 126.49 2.95 40
2 05/22/2025 05:04:59 73.74, 93.45 53.47 05/22/2025 05:04:12 73.74, 93.56 53.48 3.53 47
3 05/24/2025 14:35:58 73.80, -49.42 53.08 05/24/2025 14:36:41 73.79, -49.52 53.07 3.09 43
4 05/24/2025 15:26:41 -73.76, 117.98 126.96 05/24/2025 15:26:03 -73.75, 118.06 126.97 2.95 38
5 05/27/2025 00:57:40 -73.82, -24.91 127.31 05/27/2025 00:58:31 -73.83, -24.93 127.31 1.50 51
6 05/27/2025 01:48:25 73.76, 142.55 52.62 05/27/2025 01:47:50 73.74, 142.55 52.61 2.13 35
7 05/29/2025 11:19:25 73.87, -0.47 52.37 05/29/2025 11:20:17 73.85, -0.38 52.33 3.42 52
8 05/29/2025 12:10:07 -73.79, 167.05 127.73 05/29/2025 12:09:40 -73.77, 167.10 127.75 2.70 27
9 05/31/2025 21:41:06 -73.86, 24.15 127.99 05/31/2025 21:42:07 -73.87, 24.14 128.00 0.87 61
10 05/31/2025 22:31:51 73.80,-168.40 51.94 05/31/2025 22:31:26 73.77,-168.39 51.91 3.05 25
11 06/03/2025 08:02:50 73.87, 48.68 51.72 06/03/2025 08:03:53 73.85, 48.62 51.68 3.30 63
12 06/03/2025 08:53:32 -73.79,-143.80 128.38 06/03/2025 08:53:15 -73.82,-143.79 128.35 3.43 17

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 5/21/2025
SNOs_Map_NOAA-21_TERRA_20250521.jpg

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

Historial Predications of SNOs between NOAA-21 and TERRA