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: 3/27/2025
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 03/27/2025 06:45:24 -70.13,-105.03 112.62 03/27/2025 06:45:55 -70.11,-105.09 112.64 2.79 31
2 03/27/2025 07:36:08 70.03, 62.43 67.26 03/27/2025 07:35:22 70.01, 62.41 67.25 2.19 46
3 03/29/2025 22:11:39 70.48,-157.11 66.71 03/29/2025 22:12:50 70.36,-156.49 66.56 26.60 71
4 03/29/2025 23:02:16 -70.10, 10.79 113.70 03/29/2025 23:02:23 -70.09, 10.75 113.72 2.48 7
5 03/29/2025 23:52:59 69.96, 178.32 66.14 03/29/2025 23:51:50 69.98, 178.24 66.17 3.56 69
6 04/01/2025 14:28:25 70.16, -40.84 65.34 04/01/2025 14:29:20 70.15, -40.91 65.32 3.22 55
7 04/01/2025 15:19:08 -70.10, 126.57 114.74 04/01/2025 15:18:49 -70.09, 126.65 114.75 2.88 19
8 04/01/2025 16:09:37 69.22, -64.82 64.33 04/01/2025 16:08:29 69.26, -66.84 64.45 79.72 68
9 04/04/2025 06:45:16 70.13, 74.99 64.28 04/04/2025 06:45:45 70.14, 74.97 64.27 1.15 29
10 04/04/2025 07:35:58 -70.01,-117.51 115.87 04/04/2025 07:35:15 -70.03,-117.55 115.85 2.61 43
11 04/06/2025 22:11:27 -70.46, 22.96 116.40 04/06/2025 22:12:38 -70.39, 23.58 116.49 24.35 71
12 04/06/2025 23:02:06 70.12,-169.20 63.24 04/06/2025 23:02:08 70.10,-169.18 63.23 1.88 2
13 04/06/2025 23:52:48 -69.99, -1.70 116.91 04/06/2025 23:51:38 -70.00, -1.70 116.89 0.59 70
14 04/09/2025 14:28:13 -70.20, 139.16 117.67 04/09/2025 14:29:04 -70.18, 139.18 117.70 2.28 51
15 04/09/2025 15:18:56 70.07, -53.34 62.19 04/09/2025 15:18:31 70.06, -53.35 62.17 2.04 25

Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 3/27/2025
SNOs_Map_NOAA-21_LANDSAT-9_20250327.jpg

Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 03/27/2025 in txt file.

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