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: 10/16/2025
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 10/18/2025 15:18:58 70.03, -53.33 79.79 10/18/2025 15:19:23 70.04, -53.40 79.79 2.42 25
2 10/18/2025 16:09:39 -69.93, 114.15 100.31 10/18/2025 16:08:53 -69.93, 114.08 100.31 2.44 46
3 10/21/2025 06:45:10 -70.43,-105.47 98.87 10/21/2025 06:46:21 -70.33,-104.74 98.98 29.83 71
4 10/21/2025 07:35:49 70.03, 62.46 80.74 10/21/2025 07:35:51 70.05, 62.51 80.76 3.07 2
5 10/21/2025 08:26:30 -69.92,-130.05 99.36 10/21/2025 08:25:21 -69.95,-130.01 99.34 3.31 69
6 10/23/2025 23:01:55 -70.12, 10.81 98.24 10/23/2025 23:02:53 -70.09, 10.80 98.28 3.47 58
7 10/23/2025 23:52:39 69.98, 178.33 81.64 10/23/2025 23:52:20 69.97, 178.29 81.63 1.61 19
8 10/24/2025 00:43:09 -69.29, -13.34 99.05 10/24/2025 00:42:00 -69.32, -14.97 99.02 64.38 69
9 10/26/2025 15:18:44 -70.08, 126.66 97.37 10/26/2025 15:19:19 -70.09, 126.69 97.35 1.80 35
10 10/26/2025 16:09:28 69.94, -65.83 82.52 10/26/2025 16:08:46 69.97, -65.83 82.55 3.32 42
11 10/29/2025 06:45:01 70.59, 74.33 84.04 10/29/2025 06:46:11 70.43, 75.45 83.88 44.88 70
12 10/29/2025 07:35:34 -70.04,-117.49 96.50 10/29/2025 07:35:46 -70.05,-117.46 96.49 1.73 12
13 10/29/2025 08:26:18 69.91, 50.01 83.39 10/29/2025 08:25:13 69.94, 50.02 83.40 2.37 65

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/16/2025
SNOs_Map_NOAA-21_LANDSAT-9_20251016.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 10/16/2025 in txt file.

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