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: 10/14/2025
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 10/17/2025 08:00:06 70.02, 56.26 79.30 10/17/2025 08:00:36 70.03, 56.30 79.31 1.75 30
2 10/17/2025 08:50:48 -69.93,-136.28 100.78 10/17/2025 08:50:06 -69.92,-136.22 100.79 2.34 42
3 10/19/2025 23:26:21 -70.60, 3.84 99.17 10/19/2025 23:27:31 -70.46, 5.15 99.31 50.73 70
4 10/20/2025 00:16:55 69.96, 172.14 80.21 10/20/2025 00:17:05 69.96, 172.08 80.21 2.38 10
5 10/20/2025 01:07:37 -69.87, -20.40 99.87 10/20/2025 01:06:35 -69.86, -20.43 99.89 2.05 62
6 10/22/2025 15:43:02 -70.08, 120.46 98.74 10/22/2025 15:44:06 -70.09, 120.50 98.73 1.97 64
7 10/22/2025 16:33:46 69.97, -72.07 81.17 10/22/2025 16:33:33 69.98, -72.02 81.17 2.02 13
8 10/22/2025 17:24:20 -69.45, 96.01 99.34 10/22/2025 17:23:09 -69.54, 95.02 99.26 39.93 71
9 10/25/2025 07:59:52 -70.04,-123.68 97.85 10/25/2025 08:00:35 -70.02,-123.72 97.87 2.39 43
10 10/25/2025 08:50:36 69.93, 43.79 82.06 10/25/2025 08:50:02 69.90, 43.76 82.03 3.18 34
11 10/27/2025 23:26:14 70.83,-176.47 83.85 10/27/2025 23:27:21 70.73,-174.42 83.75 76.07 67
12 10/28/2025 00:16:42 -70.00, -7.84 96.98 10/28/2025 00:17:02 -70.02, -7.82 96.96 2.54 20
13 10/28/2025 01:07:26 69.90, 159.63 82.93 10/28/2025 01:06:29 69.91, 159.66 82.94 1.51 57

Figure of NOAA-20 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 10/14/2025
SNOs_Map_NOAA-20_LANDSAT-9_20251015.jpg

Download SNOs between NOAA-20 and LANDSAT-9 since TLE EPOCH: 10/14/2025 in txt file.

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