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: 8/1/2025
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 08/02/2025 05:55:13 70.32, 87.17 52.64 08/02/2025 05:56:24 70.28, 87.61 52.57 17.12 71
2 08/02/2025 06:45:52 -70.05,-105.09 127.64 08/02/2025 06:45:56 -70.06,-105.07 127.63 1.12 4
3 08/02/2025 07:36:36 69.96, 62.36 52.28 08/02/2025 07:35:23 69.95, 62.42 52.28 2.49 73
4 08/04/2025 22:12:04 70.09,-156.70 53.11 08/04/2025 22:12:56 70.09,-156.78 53.10 2.93 52
5 08/04/2025 23:02:47 -70.03, 10.72 126.96 08/04/2025 23:02:25 -70.04, 10.78 126.95 2.78 22
6 08/04/2025 23:53:14 69.03, 179.46 52.02 08/04/2025 23:52:07 69.10, 177.16 52.18 91.93 67
7 08/07/2025 14:28:59 70.08, -40.91 53.83 08/07/2025 14:29:24 70.10, -40.87 53.84 2.79 25
8 08/07/2025 15:19:41 -69.95, 126.60 126.30 08/07/2025 15:18:55 -69.94, 126.54 126.30 2.77 46
9 08/10/2025 05:55:13 -70.30, -92.79 125.18 08/10/2025 05:56:24 -70.26, -92.40 125.25 15.49 71
10 08/10/2025 06:45:53 70.01, 74.96 54.53 08/10/2025 06:45:53 70.04, 74.93 54.55 2.88 0
11 08/10/2025 07:36:36 -69.94,-117.61 125.54 08/10/2025 07:35:23 -69.93,-117.58 125.54 1.06 73
12 08/12/2025 22:12:04 -70.13, 23.24 124.56 08/12/2025 22:12:53 -70.13, 23.30 124.58 2.39 49
13 08/12/2025 23:02:47 70.01,-169.26 55.32 08/12/2025 23:02:20 70.01,-169.22 55.32 1.33 27

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 8/1/2025
SNOs_Map_NOAA-21_LANDSAT-9_20250801.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 08/01/2025 in txt file.

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