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: 4/5/2025
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 04/05/2025 20:50:03 -73.61, 37.52 112.60 04/05/2025 20:50:51 -73.60, 37.53 112.62 0.86 48
2 04/05/2025 21:40:46 73.49,-154.90 67.26 04/05/2025 21:40:12 73.51,-155.00 67.28 3.50 34
3 04/08/2025 07:11:41 73.63, 62.06 66.50 04/08/2025 07:12:51 73.62, 62.01 66.47 2.41 70
4 04/08/2025 08:02:24 -73.56,-130.45 113.60 04/08/2025 08:02:12 -73.56,-130.45 113.60 0.15 12
5 04/10/2025 17:33:33 -74.39, 84.79 113.56 04/10/2025 17:34:38 -74.31, 87.97 113.83 95.64 65
6 04/10/2025 18:24:02 73.59,-105.94 65.54 04/10/2025 18:24:11 73.57,-105.97 65.51 2.97 9
7 04/10/2025 19:14:45 -73.51, 61.56 114.57 04/10/2025 19:13:32 -73.52, 61.59 114.55 1.20 73
8 04/13/2025 04:45:39 -73.62, -81.41 115.33 04/13/2025 04:46:09 -73.64, -81.35 115.32 3.12 30
9 04/13/2025 05:36:22 73.52, 86.14 64.55 04/13/2025 05:35:30 73.52, 86.07 64.57 2.43 52
10 04/15/2025 15:07:16 73.64, -56.86 63.82 04/15/2025 15:08:06 73.65, -56.87 63.82 1.44 50
11 04/15/2025 15:57:58 -73.55, 110.65 116.30 04/15/2025 15:57:27 -73.56, 110.61 116.28 1.69 31
12 04/18/2025 01:28:52 -73.68, -32.37 117.00 04/18/2025 01:30:02 -73.70, -32.30 117.01 2.71 70
13 04/18/2025 02:19:35 73.58, 135.18 62.88 04/18/2025 02:19:22 73.62, 135.19 62.91 3.65 13

Figure of NOAA-21 and TERRA satellite orbits during SNOs since TLE Epoch: 4/5/2025
SNOs_Map_NOAA-21_TERRA_20250405.jpg

Download SNOs between NOAA-21 and TERRA since TLE EPOCH: 04/05/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and TERRA