Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 5 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2025   22:16:18   (   0.00,-136.99) (   0.88,-133.00)  454.53                14
 05/06/2025   10:39:42   (   0.00,-136.98) (   0.29,-138.28)  148.29                80
 05/07/2025   10:18:18   (   0.00,-136.97) (  -0.72,-133.75)  366.83                80
 05/08/2025   22:40:16   (  -0.00,-136.96) (  -0.48,-139.06)  239.28                80
 05/09/2025   22:24:12   (   0.00,-136.95) (   0.54,-134.53)  275.59                80
 05/11/2025   10:46:02   (  -0.00,-136.93) (   0.62,-139.81)  328.11                80
 05/12/2025   10:27:19   (  -0.00,-136.92) (  -0.39,-135.29)  186.32                80
 05/13/2025   22:46:35   (  -0.00,-136.89) (  -0.85,-140.59)  421.17                80
 05/14/2025   22:30:32   (  -0.01,-136.88) (   0.17,-136.06)   92.81                80
 05/17/2025   10:33:38   (   0.02,-136.82) (   0.01,-136.81)    1.22                80