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: 7/18/2025
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 07/18/2025 14:03:35 70.13, -34.63 49.22 07/18/2025 14:04:40 70.13, -34.68 49.21 1.87 65
2 07/18/2025 14:54:17 -70.04, 132.83 130.88 07/18/2025 14:54:10 -70.02, 132.79 130.89 2.21 7
3 07/18/2025 15:44:54 69.55, -59.14 48.62 07/18/2025 15:43:43 69.59, -60.16 48.71 39.78 71
4 07/21/2025 06:20:30 70.09, 81.21 49.67 07/21/2025 06:21:11 70.09, 81.13 49.67 2.77 41
5 07/21/2025 07:11:12 -69.99,-111.33 130.43 07/21/2025 07:10:41 -69.98,-111.39 130.43 2.40 31
6 07/23/2025 21:46:54 -70.88, 28.40 128.96 07/23/2025 21:48:02 -70.79, 30.41 129.13 73.86 68
7 07/23/2025 22:37:25 70.10,-163.04 50.23 07/23/2025 22:37:40 70.08,-162.99 50.21 2.40 15
8 07/23/2025 23:28:07 -69.99, 4.44 129.88 07/23/2025 23:27:10 -69.98, 4.49 129.89 2.46 57
9 07/26/2025 14:03:36 -70.15, 145.33 129.14 07/26/2025 14:04:44 -70.12, 145.30 129.18 3.26 68
10 07/26/2025 14:54:19 70.01, -47.14 50.71 07/26/2025 14:54:11 70.01, -47.21 50.72 3.02 8
11 07/26/2025 15:44:57 -69.68, 120.66 129.62 07/26/2025 15:43:44 -69.75, 120.05 129.53 24.83 73
12 07/29/2025 06:20:31 -70.11, -98.84 128.57 07/29/2025 06:21:14 -70.10, -98.86 128.59 1.75 43
13 07/29/2025 07:11:14 69.97, 68.68 51.30 07/29/2025 07:10:41 69.98, 68.63 51.31 2.47 33
14 07/31/2025 21:46:56 70.83,-151.53 52.84 07/31/2025 21:48:04 70.70,-149.72 52.63 68.11 68
15 07/31/2025 22:37:26 -70.07, 16.99 127.95 07/31/2025 22:37:44 -70.05, 16.97 127.98 2.23 18
16 07/31/2025 23:28:09 69.94,-175.50 51.92 07/31/2025 23:27:11 69.94,-175.55 51.92 2.05 58

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 7/18/2025
SNOs_Map_NOAA-21_LANDSAT-8_20250718.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 07/18/2025 in txt file.

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