Simultaneous Nadir Overpasses (SNOs) Predictions

Prediction of SNOs between GOES-18 and NOAA-21 Satellite Orbit:

Table of predicted SNOs for the next 14.0 days since TLE Epoch: 9/5/2025
Index Date Time (GOES-18) GOES-18 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/06/2025 10:34:15 -0.03,-136.97 -0.05,-136.97 2.16 80
2 09/08/2025 22:34:44 0.03,-136.99 -0.13,-137.74 84.47 80
3 09/09/2025 22:18:39 0.03,-137.00 0.86,-133.20 432.57 80
4 09/11/2025 10:40:26 -0.03,-136.99 0.33,-138.46 168.11 80
5 09/12/2025 10:19:02 -0.03,-136.99 -0.73,-133.94 348.25 80
6 09/13/2025 22:40:56 0.03,-136.99 -0.48,-139.23 256.20 80
7 09/14/2025 22:24:52 0.04,-136.98 0.58,-134.71 259.68 80
8 09/16/2025 10:46:39 -0.04,-136.96 0.61,-139.97 342.40 80
9 09/17/2025 10:25:13 -0.04,-136.95 -0.40,-135.44 173.29 80
10 09/18/2025 22:47:08 0.04,-136.94 -0.81,-140.73 431.66 80

Figure of GOES-18 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/5/2025
SNOs_Map_GOES-18_NOAA-21_20250906.jpg

Download SNOs between GOES-18 and NOAA-21 since TLE EPOCH: 09/05/2025 in txt file.

Historical Predications of SNOs between GOES-18 and NOAA-21