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: 4/10/2025
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 04/12/2025 06:45:05 -70.21,-105.09 118.65 04/12/2025 06:45:54 -70.20,-105.01 118.67 3.25 49
2 04/12/2025 07:35:48 70.08, 62.43 61.21 04/12/2025 07:35:21 70.09, 62.49 61.22 2.93 27
3 04/12/2025 08:26:13 -69.06,-128.78 119.86 04/12/2025 08:25:07 -69.10,-131.22 119.75 97.21 66
4 04/14/2025 23:01:55 -70.16, 10.77 119.67 04/14/2025 23:02:23 -70.17, 10.83 119.66 2.31 28
5 04/14/2025 23:52:38 70.03, 178.29 60.19 04/14/2025 23:51:51 70.01, 178.24 60.17 3.15 47
6 04/17/2025 14:28:07 70.46, -41.22 59.71 04/17/2025 14:29:19 70.36, -40.65 59.59 23.92 72
7 04/17/2025 15:18:45 -70.12, 126.62 120.66 04/17/2025 15:18:51 -70.15, 126.68 120.64 3.38 6
8 04/17/2025 16:09:28 70.00, -65.87 59.20 04/17/2025 16:08:19 69.98, -65.92 59.19 2.40 69
9 04/20/2025 06:44:51 70.17, 75.02 58.48 04/20/2025 06:45:48 70.18, 74.97 58.48 1.86 57
10 04/20/2025 07:35:34 -70.10,-117.55 121.61 04/20/2025 07:35:18 -70.07,-117.54 121.64 2.78 16
11 04/20/2025 08:26:04 69.28, 50.96 57.54 04/20/2025 08:24:56 69.35, 49.11 57.66 72.87 68
12 04/22/2025 23:01:41 70.16,-169.17 57.56 04/22/2025 23:02:14 70.16,-169.16 57.56 0.53 33
13 04/22/2025 23:52:23 -70.03, -1.66 122.59 04/22/2025 23:51:44 -70.06, -1.67 122.56 3.08 39

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/10/2025
SNOs_Map_NOAA-21_LANDSAT-9_20250410.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/10/2025 in txt file.

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