Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 10/12/2025
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 10/13/2025 06:45:17 70.11, 74.97 77.89 10/13/2025 06:46:23 70.13, 74.98 77.92 2.82 66
2 10/13/2025 07:35:58 -70.00,-117.55 102.20 10/13/2025 07:35:53 -70.02,-117.54 102.19 2.08 5
3 10/13/2025 08:26:37 69.59, 50.38 77.40 10/13/2025 08:25:25 69.64, 49.57 77.45 31.58 72
4 10/15/2025 23:02:08 70.09,-169.20 78.86 10/15/2025 23:02:53 70.11,-169.17 78.89 3.27 45
5 10/15/2025 23:52:49 -69.98, -1.72 101.24 10/15/2025 23:52:23 -70.01, -1.69 101.21 3.13 26
6 10/18/2025 15:18:59 70.07, -53.39 79.83 10/18/2025 15:19:23 70.06, -53.36 79.81 1.71 24
7 10/18/2025 16:09:40 -69.96, 114.09 100.28 10/18/2025 16:08:53 -69.96, 114.12 100.28 1.28 47
8 10/21/2025 06:45:10 -70.42,-105.45 98.89 10/21/2025 06:46:22 -70.31,-104.76 98.99 28.05 72
9 10/21/2025 07:35:49 70.02, 62.48 80.73 10/21/2025 07:35:52 70.04, 62.49 80.75 2.25 3
10 10/21/2025 08:26:30 -69.90,-130.03 99.38 10/21/2025 08:25:22 -69.93,-130.03 99.35 3.50 68
11 10/23/2025 23:01:54 -70.10, 10.83 98.26 10/23/2025 23:02:53 -70.10, 10.81 98.27 1.09 59
12 10/23/2025 23:52:38 69.97, 178.35 81.62 10/23/2025 23:52:20 69.98, 178.29 81.63 2.43 18
13 10/24/2025 00:43:09 -69.32, -13.39 99.01 10/24/2025 00:41:59 -69.38, -14.89 98.96 59.32 70
14 10/26/2025 15:18:44 -70.06, 126.69 97.38 10/26/2025 15:19:21 -70.07, 126.66 97.38 1.49 37
15 10/26/2025 16:09:28 69.93, -65.80 82.50 10/26/2025 16:08:48 69.95, -65.86 82.52 3.07 40

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/12/2025
SNOs_Map_NOAA-21_LANDSAT-9_20251013.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/12/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and LANDSAT-9