Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 19.  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)
 09/19/2025   22:31:03   (   0.02,-137.01) (   0.22,-136.20)   92.99                80
 09/22/2025   10:34:05   (  -0.02,-137.00) (  -0.05,-136.93)    8.40                80
 09/24/2025   22:34:35   (   0.02,-137.00) (  -0.10,-137.69)   78.63                80
 09/25/2025   22:15:48   (   0.00,-136.99) (   0.84,-133.14)  438.00                80
 09/27/2025   10:40:16   (   0.01,-136.97) (   0.32,-138.41)  164.70                80
 09/28/2025   10:18:50   (   0.01,-136.95) (  -0.69,-133.88)  350.73                80
 09/29/2025   22:40:45   (  -0.01,-136.94) (  -0.52,-139.17)  254.01                80
 09/30/2025   22:24:39   (  -0.00,-136.93) (   0.49,-134.63)  261.06                80
 10/02/2025   10:46:26   (   0.00,-136.89) (   0.67,-139.90)  342.98                80
 10/03/2025   10:25:01   (  -0.00,-136.87) (  -0.35,-135.37)  171.71                80