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: 9/7/2025
Index Date Time (GOES-18) GOES-18 Lat,Lon NOAA-21 Lat,Lon Distance(km) Time Diff (sec)
1 09/08/2025 22:34:45 0.03,-137.00 -0.12,-137.74 84.05 80
2 09/09/2025 22:18:39 0.03,-137.00 0.88,-133.20 433.13 80
3 09/11/2025 10:40:26 -0.03,-137.00 0.31,-138.47 167.79 80
4 09/12/2025 10:19:02 -0.03,-136.99 -0.74,-133.94 348.66 80
5 09/13/2025 22:40:56 0.04,-136.99 -0.48,-139.23 255.27 80
6 09/14/2025 22:24:52 0.04,-136.99 0.58,-134.71 260.69 80
7 09/16/2025 10:46:39 -0.04,-136.97 0.60,-139.97 341.63 80
8 09/17/2025 10:25:14 -0.04,-136.96 -0.40,-135.44 174.13 80
9 09/18/2025 22:47:08 0.04,-136.96 -0.81,-140.73 430.33 80
10 09/19/2025 22:31:02 0.05,-136.95 0.19,-136.19 85.56 80

Figure of GOES-18 and NOAA-21 satellite orbits during SNOs since TLE Epoch: 9/7/2025
SNOs_Map_GOES-18_NOAA-21_20250908.jpg

Download SNOs between GOES-18 and NOAA-21 since TLE EPOCH: 09/07/2025 in txt file.

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