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 23:01:54 -70.14, 10.81 119.69 04/14/2025 23:02:23 -70.15, 10.79 119.69 1.09 29
2 04/14/2025 23:52:38 70.06, 178.25 60.21 04/14/2025 23:51:50 70.04, 178.29 60.20 2.41 48
3 04/17/2025 14:28:07 70.49, -41.27 59.74 04/17/2025 14:29:18 70.40, -40.60 59.62 27.15 71
4 04/17/2025 15:18:44 -70.11, 126.65 120.68 04/17/2025 15:18:51 -70.13, 126.64 120.66 2.01 7
5 04/17/2025 16:09:28 70.03, -65.92 59.24 04/17/2025 16:08:18 70.02, -65.87 59.23 2.57 70
6 04/20/2025 06:44:52 70.21, 74.96 58.52 04/20/2025 06:45:48 70.22, 75.03 58.52 2.68 56
7 04/20/2025 07:35:34 -70.09,-117.54 121.62 04/20/2025 07:35:18 -70.11,-117.49 121.60 2.93 16
8 04/20/2025 08:26:05 69.32, 50.90 57.58 04/20/2025 08:24:56 69.39, 49.16 57.69 68.53 69
9 04/22/2025 23:01:41 70.16,-169.17 57.56 04/22/2025 23:02:15 70.15,-169.18 57.55 0.57 34
10 04/22/2025 23:52:23 -70.03, -1.66 122.59 04/22/2025 23:51:45 -70.05, -1.69 122.57 2.09 38
11 04/25/2025 14:27:56 -70.77, 138.35 122.69 04/25/2025 14:29:05 -70.65, 139.80 122.84 54.79 69
12 04/25/2025 15:18:29 70.12, -53.31 56.63 04/25/2025 15:18:40 70.10, -53.37 56.61 3.03 11
13 04/25/2025 16:09:11 -69.99, 114.19 123.51 04/25/2025 16:08:10 -69.99, 114.12 123.50 2.85 61

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/13/2025
SNOs_Map_NOAA-21_LANDSAT-9_20250413.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