Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-20 and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 9/10/2025
Index Date (NOAA-20) Time (NOAA-20) Lat,Lon (NOAA-20) SZA (NOAA-20 ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 09/12/2025 14:53:14 -70.66, 131.97 113.33 09/12/2025 14:54:23 -70.55, 133.54 113.48 59.19 69
2 09/12/2025 15:43:47 69.98, -59.66 65.99 09/12/2025 15:43:59 69.95, -59.67 65.96 2.87 12
3 09/12/2025 16:34:29 -69.88, 107.82 114.11 09/12/2025 16:33:28 -69.89, 107.88 114.09 3.12 61
4 09/15/2025 07:09:55 -70.05,-111.30 112.93 09/15/2025 07:11:00 -70.06,-111.29 112.93 0.74 65
5 09/15/2025 08:00:39 69.96, 56.16 66.99 09/15/2025 08:00:27 69.96, 56.21 66.99 2.07 12
6 09/15/2025 08:51:14 -69.48,-135.82 113.49 09/15/2025 08:50:03 -69.51,-136.76 113.44 36.87 71
7 09/17/2025 23:26:48 -70.03, 4.52 111.92 09/17/2025 23:27:29 -70.05, 4.58 111.91 2.75 41
8 09/18/2025 00:17:31 69.89, 172.05 67.95 09/18/2025 00:16:57 69.88, 172.00 67.95 1.98 34
9 09/20/2025 14:53:11 70.77, -48.18 69.86 09/20/2025 14:54:19 70.61, -46.34 69.68 69.68 68
10 09/20/2025 15:43:40 -69.97, 120.40 110.95 09/20/2025 15:43:59 -69.96, 120.34 110.96 2.35 19
11 09/20/2025 16:34:24 69.88, -72.15 68.97 09/20/2025 16:33:26 69.85, -72.17 68.95 3.32 58
12 09/23/2025 07:09:51 70.08, 68.70 70.19 09/23/2025 07:10:57 70.07, 68.75 70.18 1.96 66
13 09/23/2025 08:00:33 -69.96,-123.80 109.92 09/23/2025 08:00:27 -69.97,-123.76 109.92 1.67 6
14 09/23/2025 08:51:10 69.50, 44.19 69.63 09/23/2025 08:49:59 69.58, 43.35 69.71 33.68 71

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/10/2025
SNOs_Map_NOAA-20_LANDSAT-9_20250911.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 09/10/2025 in txt file.

Historial Predications of SNOs between NOAA-20 and LANDSAT-9