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: 4/4/2025
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 04/05/2025 14:03:10 -70.83, 144.45 115.49 04/05/2025 14:04:19 -70.72, 146.06 115.66 60.11 69
2 04/05/2025 14:53:41 70.12, -47.10 63.75 04/05/2025 14:53:54 70.12, -47.17 63.75 2.81 13
3 04/05/2025 15:44:24 -70.06, 120.31 116.33 04/05/2025 15:43:23 -70.06, 120.38 116.32 2.68 61
4 04/08/2025 06:19:49 -70.23, -98.80 117.14 04/08/2025 06:20:54 -70.25, -98.75 117.13 2.72 65
5 04/08/2025 07:10:32 70.10, 68.72 62.72 04/08/2025 07:10:22 70.09, 68.66 62.71 2.35 10
6 04/08/2025 08:01:08 -69.66,-123.31 117.75 04/08/2025 07:59:57 -69.70,-124.24 117.68 36.24 71
7 04/10/2025 22:36:39 -70.17, 17.09 118.20 04/10/2025 22:37:22 -70.18, 17.03 118.20 2.69 43
8 04/10/2025 23:27:23 70.09,-175.48 61.71 04/10/2025 23:26:49 70.07,-175.48 61.69 2.42 34
9 04/13/2025 14:03:00 70.93, -35.66 61.63 04/13/2025 14:04:08 70.83, -33.76 61.47 70.13 68
10 04/13/2025 14:53:30 -70.17, 132.87 119.18 04/13/2025 14:53:48 -70.17, 132.90 119.18 1.19 18
11 04/13/2025 15:44:13 70.04, -59.63 60.68 04/13/2025 15:43:15 70.06, -59.61 60.70 1.61 58
12 04/16/2025 06:19:37 70.21, 81.28 59.92 04/16/2025 06:20:44 70.23, 81.24 59.93 2.10 67
13 04/16/2025 07:10:19 -70.13,-111.29 120.17 04/16/2025 07:10:13 -70.12,-111.28 120.19 1.78 6
14 04/16/2025 08:00:56 69.69, 56.68 59.36 04/16/2025 07:59:45 69.73, 55.82 59.42 33.50 71

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 4/4/2025
SNOs_Map_NOAA-21_LANDSAT-8_20250404.jpg

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

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