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: 4/20/2025
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 04/20/2025 11:50:42 74.34, -9.38 62.89 04/20/2025 11:51:48 74.25, -6.64 62.65 83.02 66
2 04/20/2025 12:41:12 -73.62, 159.68 117.93 04/20/2025 12:41:20 -73.63, 159.68 117.92 0.95 8
3 04/20/2025 13:31:54 73.46, -32.62 61.89 04/20/2025 13:30:41 73.50, -32.91 61.96 10.43 73
4 04/22/2025 23:02:49 73.65,-175.79 61.29 04/22/2025 23:03:15 73.64,-175.84 61.27 2.64 26
5 04/22/2025 23:53:32 -73.58, -8.30 118.81 04/22/2025 23:52:36 -73.60, -8.24 118.78 3.05 56
6 04/25/2025 09:24:25 -73.68,-151.25 119.49 04/25/2025 09:25:10 -73.71,-151.22 119.48 2.79 45
7 04/25/2025 10:15:09 73.62, 16.20 60.44 04/25/2025 10:14:30 73.61, 16.25 60.43 1.82 39
8 04/27/2025 19:46:02 73.73,-126.77 59.79 04/27/2025 19:47:03 73.72,-126.70 59.76 2.25 61
9 04/27/2025 20:36:45 -73.66, 40.72 120.31 04/27/2025 20:36:25 -73.66, 40.82 120.31 3.02 20
10 04/30/2025 06:07:43 -74.07,-102.99 120.60 04/30/2025 06:08:53 -73.95,-101.74 120.80 40.39 70
11 04/30/2025 06:58:20 73.66, 65.30 58.95 04/30/2025 06:58:16 73.68, 65.35 58.96 2.57 4
12 04/30/2025 07:48:55 -73.19,-126.31 121.59 04/30/2025 07:47:45 -73.25,-127.86 121.43 50.12 70
13 05/02/2025 17:19:55 -73.67, 89.90 121.79 05/02/2025 17:20:11 -73.67, 89.81 121.78 2.72 16

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 4/20/2025
SNOs_Map_NOAA-21_TERRA_20250420.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 04/20/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA