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: 4/26/2025
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 04/26/2025 22:36:22 -70.21, 17.08 123.70 04/26/2025 22:37:11 -70.23, 17.10 123.68 2.51 49
2 04/26/2025 23:27:06 70.11,-175.46 56.19 04/26/2025 23:26:38 70.13,-175.40 56.21 3.15 28
3 04/29/2025 14:02:53 71.05, -35.85 56.36 04/29/2025 14:04:00 70.93, -33.62 56.18 81.95 67
4 04/29/2025 14:53:20 -70.15, 132.92 124.59 04/29/2025 14:53:42 -70.16, 132.87 124.59 2.08 22
5 04/29/2025 15:44:04 70.06, -59.62 55.30 04/29/2025 15:43:09 70.06, -59.63 55.30 0.51 55
6 05/02/2025 06:19:36 70.23, 81.24 54.69 05/02/2025 06:20:42 70.21, 81.19 54.66 2.75 66
7 05/02/2025 07:10:18 -70.11,-111.27 125.45 05/02/2025 07:10:12 -70.10,-111.34 125.46 2.96 6
8 05/02/2025 08:00:55 69.65, 56.75 54.07 05/02/2025 07:59:44 69.72, 55.77 54.17 38.43 71
9 05/04/2025 22:36:33 70.20,-162.96 53.88 05/04/2025 22:37:09 70.23,-162.92 53.90 3.12 36
10 05/04/2025 23:27:15 -70.09, 4.53 126.25 05/04/2025 23:26:40 -70.07, 4.48 126.27 3.25 35
11 05/07/2025 14:02:55 -70.71, 144.68 126.34 05/07/2025 14:04:05 -70.59, 145.84 126.49 44.94 70
12 05/07/2025 14:53:30 70.14, -47.11 53.06 05/07/2025 14:53:38 70.15, -47.15 53.07 2.00 8
13 05/07/2025 15:44:12 -70.03, 120.38 127.06 05/07/2025 15:43:08 -70.04, 120.33 127.05 2.40 64

Figure of NOAA-21 and LANDSAT-8 satellite orbits during SNOs since TLE Epoch: 4/26/2025
SNOs_Map_NOAA-21_LANDSAT-8_20250426.jpg

Download SNOs between NOAA-21 and LANDSAT-8 since TLE EPOCH: 04/26/2025 in txt file.

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