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: 4/11/2025
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 06:45:04 -70.17,-105.03 118.69 04/12/2025 06:45:54 -70.19,-105.03 118.68 1.46 50
2 04/12/2025 07:35:48 70.09, 62.41 61.22 04/12/2025 07:35:21 70.08, 62.47 61.21 2.45 27
3 04/12/2025 08:26:13 -69.07,-128.80 119.85 04/12/2025 08:25:06 -69.14,-131.17 119.71 94.38 67
4 04/14/2025 23:01:55 -70.18, 10.75 119.65 04/14/2025 23:02:23 -70.16, 10.81 119.68 3.36 28
5 04/14/2025 23:52:38 70.05, 178.26 60.21 04/14/2025 23:51:50 70.05, 178.30 60.21 1.63 48
6 04/17/2025 14:28:07 70.48, -41.25 59.73 04/17/2025 14:29:18 70.41, -40.58 59.63 26.39 71
7 04/17/2025 15:18:45 -70.15, 126.58 120.63 04/17/2025 15:18:51 -70.14, 126.66 120.65 3.13 6
8 04/17/2025 16:09:28 70.02, -65.91 59.23 04/17/2025 16:08:18 70.03, -65.85 59.24 2.27 70
9 04/20/2025 06:44:52 70.20, 74.97 58.51 04/20/2025 06:45:49 70.17, 74.96 58.47 3.39 57
10 04/20/2025 07:35:34 -70.08,-117.52 121.64 04/20/2025 07:35:19 -70.07,-117.55 121.65 1.75 15
11 04/20/2025 08:26:05 69.31, 50.92 57.57 04/20/2025 08:24:57 69.34, 49.10 57.65 71.29 68
12 04/22/2025 23:01:40 70.15,-169.15 57.55 04/22/2025 23:02:14 70.16,-169.17 57.56 1.81 34
13 04/22/2025 23:52:23 -70.07, -1.72 122.55 04/22/2025 23:51:44 -70.06, -1.68 122.56 2.20 39

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 4/11/2025
SNOs_Map_NOAA-21_LANDSAT-9_20250411.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 04/11/2025 in txt file.

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