Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-21 and LANDSAT-8 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 4/7/2025
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (LANDSAT-8) Time (LANDSAT-8) Lat,Lon (LANDSAT-8) SZA (LANDSAT-8 ) Distance(km) Time Diff (sec)
1 04/08/2025 06:19:49 -70.22, -98.78 117.15 04/08/2025 06:20:54 -70.24, -98.76 117.14 2.47 65
2 04/08/2025 07:10:33 70.14, 68.66 62.76 04/08/2025 07:10:21 70.14, 68.74 62.76 2.88 12
3 04/08/2025 08:01:08 -69.65,-123.30 117.77 04/08/2025 07:59:57 -69.69,-124.25 117.69 37.27 71
4 04/10/2025 22:36:40 -70.21, 17.02 118.16 04/10/2025 22:37:21 -70.20, 17.07 118.17 1.63 41
5 04/10/2025 23:27:23 70.07,-175.46 61.70 04/10/2025 23:26:48 70.10,-175.44 61.72 2.75 35
6 04/13/2025 14:03:00 70.91, -35.64 61.62 04/13/2025 14:04:08 70.78, -33.83 61.42 67.52 68
7 04/13/2025 14:53:30 -70.16, 132.89 119.19 04/13/2025 14:53:47 -70.17, 132.91 119.18 1.70 17
8 04/13/2025 15:44:13 70.03, -59.60 60.67 04/13/2025 15:43:15 70.01, -59.68 60.65 3.73 58
9 04/16/2025 06:19:37 70.25, 81.22 59.96 04/16/2025 06:20:41 70.25, 81.29 59.96 2.56 64
10 04/16/2025 07:10:19 -70.12,-111.27 120.19 04/16/2025 07:10:11 -70.14,-111.24 120.17 2.69 8
11 04/16/2025 08:00:55 69.62, 56.79 59.29 04/16/2025 07:59:44 69.70, 55.79 59.40 39.46 71
12 04/18/2025 22:36:26 70.18,-162.88 58.95 04/18/2025 22:37:06 70.18,-162.93 58.94 1.91 40
13 04/18/2025 23:27:09 -70.10, 4.55 121.15 04/18/2025 23:26:35 -70.12, 4.63 121.13 3.61 34

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 4/7/2025
SNOs_Map_NOAA-21_LANDSAT-8_20250407.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 04/07/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and LANDSAT-8