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: 4/13/2025
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 04/14/2025 23:01:55 -70.15, 10.79 119.68 04/14/2025 23:02:24 -70.13, 10.77 119.70 2.40 29
2 04/14/2025 23:52:38 70.02, 178.31 60.17 04/14/2025 23:51:51 70.03, 178.27 60.19 1.81 47
3 04/17/2025 14:28:07 70.50, -41.29 59.75 04/17/2025 14:29:18 70.39, -40.61 59.61 28.26 71
4 04/17/2025 15:18:44 -70.12, 126.63 120.66 04/17/2025 15:18:51 -70.12, 126.63 120.67 0.42 7
5 04/17/2025 16:09:27 69.99, -65.86 59.19 04/17/2025 16:08:18 70.01, -65.88 59.22 2.41 69
6 04/20/2025 06:44:51 70.17, 75.02 58.48 04/20/2025 06:45:49 70.16, 74.95 58.46 3.04 58
7 04/20/2025 07:35:34 -70.10,-117.55 121.61 04/20/2025 07:35:18 -70.11,-117.50 121.60 2.46 16
8 04/20/2025 08:26:05 69.33, 50.89 57.59 04/20/2025 08:24:56 69.39, 49.16 57.69 67.94 69
9 04/22/2025 23:01:41 70.16,-169.18 57.56 04/22/2025 23:02:15 70.16,-169.17 57.56 0.47 34
10 04/22/2025 23:52:23 -70.04, -1.67 122.58 04/22/2025 23:51:45 -70.06, -1.68 122.56 1.93 38
11 04/25/2025 14:27:57 -70.77, 138.34 122.68 04/25/2025 14:29:06 -70.67, 139.83 122.82 55.62 69
12 04/25/2025 15:18:30 70.12, -53.32 56.64 04/25/2025 15:18:41 70.12, -53.34 56.63 0.82 11
13 04/25/2025 16:09:12 -70.00, 114.19 123.51 04/25/2025 16:08:11 -70.02, 114.15 123.48 2.73 61

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/13/2025
SNOs_Map_NOAA-21_LANDSAT-9_20250414.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/13/2025 in txt file.

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