Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between NOAA-21 and NOAA-19 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 7/31/2025
Index Date (NOAA-21) Time (NOAA-21) Lat,Lon (NOAA-21) SZA (NOAA-21 ) Date (NOAA-19) Time (NOAA-19) Lat,Lon (NOAA-19) SZA (NOAA-19 ) Distance(km) Time Diff (sec)
1 08/03/2025 20:49:39 70.27,-136.35 53.01 08/03/2025 20:48:29 70.29,-137.86 53.11 56.95 70
2 08/03/2025 21:40:31 -70.67, 30.32 126.56 08/03/2025 21:39:16 -70.66, 30.03 126.54 10.61 75
3 08/03/2025 22:31:19 70.80,-162.57 53.59 08/03/2025 22:30:16 70.77,-162.54 53.57 2.78 63
4 08/03/2025 23:22:03 -70.78, 4.77 126.42 08/03/2025 23:21:10 -70.79, 4.76 126.41 0.66 53
5 08/04/2025 00:12:49 70.80, 172.04 53.61 08/04/2025 00:12:12 70.79, 172.01 53.61 1.61 37
6 08/04/2025 01:03:33 -70.79, -20.62 126.40 08/04/2025 01:03:06 -70.80, -20.70 126.37 3.56 27
7 08/04/2025 01:54:20 70.86, 146.57 53.69 08/04/2025 01:54:07 70.86, 146.65 53.69 2.66 13
8 08/04/2025 02:45:04 -70.84, -46.09 126.32 08/04/2025 02:45:02 -70.82, -46.15 126.34 3.26 2
9 08/04/2025 03:35:50 70.86, 121.19 53.71 08/04/2025 03:36:03 70.88, 121.19 53.73 1.92 13
10 08/04/2025 04:26:35 -70.90, -71.55 126.24 08/04/2025 04:26:57 -70.89, -71.51 126.25 1.78 22
11 08/04/2025 05:17:21 70.92, 95.72 53.79 08/04/2025 05:17:59 70.90, 95.74 53.77 2.54 38
12 08/04/2025 06:08:05 -70.90, -96.94 126.22 08/04/2025 06:08:53 -70.91, -96.96 126.22 1.14 48
13 08/04/2025 06:58:51 70.93, 70.34 53.82 08/04/2025 06:59:55 70.92, 70.29 53.80 1.93 64
14 08/04/2025 07:49:36 -70.96,-122.41 126.14 08/04/2025 07:50:48 -70.98,-122.33 126.14 3.58 72
15 08/04/2025 08:40:32 71.50, 43.96 54.46 08/04/2025 08:41:41 71.45, 45.76 54.32 63.71 69

Figure of NOAA-21 and NOAA-19 satellite orbits during SNOs since TLE Epoch: 7/31/2025
SNOs_Map_NOAA-21_NOAA-19_20250731.jpg

Download SNOs between NOAA-21 and NOAA-19 since TLE EPOCH: 07/31/2025 in txt file.

Historial Predications of SNOs between NOAA-21 and NOAA-19