Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 9/21/2025
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (LANDSAT-9) Time (LANDSAT-9) Lat,Lon (LANDSAT-9) SZA (LANDSAT-9 ) Distance(km) Time Diff (sec)
1 09/21/2025 22:12:01 70.69,-157.59 70.28 09/21/2025 22:13:10 70.58,-156.10 70.15 56.17 69
2 09/21/2025 23:02:32 -70.04, 10.76 110.38 09/21/2025 23:02:48 -70.03, 10.73 110.39 1.64 16
3 09/21/2025 23:53:16 69.91, 178.26 69.51 09/21/2025 23:52:15 69.93, 178.23 69.53 2.65 61
4 09/24/2025 14:28:43 70.10, -40.87 70.71 09/24/2025 14:29:49 70.11, -40.91 70.72 2.35 66
5 09/24/2025 15:19:25 -70.02, 126.56 109.35 09/24/2025 15:19:19 -70.00, 126.56 109.38 2.53 6
6 09/24/2025 16:10:02 69.52, -65.39 70.16 09/24/2025 16:08:51 69.62, -66.32 70.27 37.76 71
7 09/27/2025 06:45:36 70.09, 74.92 71.75 09/27/2025 06:46:19 70.11, 74.96 71.76 2.52 43
8 09/27/2025 07:36:17 -69.96,-117.57 108.37 09/27/2025 07:35:50 -69.94,-117.64 108.39 3.42 27
9 09/29/2025 23:02:27 70.03,-169.21 72.73 09/29/2025 23:02:49 70.02,-169.28 72.71 3.04 22
10 09/29/2025 23:53:09 -69.96, -1.78 107.33 09/29/2025 23:52:18 -69.97, -1.72 107.33 2.60 51
11 10/02/2025 14:28:38 -70.28, 138.89 106.01 10/02/2025 14:29:49 -70.24, 139.27 106.05 14.71 71
12 10/02/2025 15:19:20 70.04, -53.44 73.77 10/02/2025 15:19:18 70.02, -53.41 73.75 2.92 2
13 10/02/2025 16:10:01 -69.92, 114.07 106.34 10/02/2025 16:08:48 -69.91, 114.08 106.35 0.62 73
14 10/05/2025 06:45:27 -70.08,-105.02 105.18 10/05/2025 06:46:20 -70.10,-105.05 105.16 2.73 53
15 10/05/2025 07:36:12 70.00, 62.40 74.76 10/05/2025 07:35:47 69.99, 62.44 74.75 2.08 25

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 9/21/2025
SNOs_Map_NOAA-21_LANDSAT-9_20250922.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 09/21/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and LANDSAT-9