Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 7 11.  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)
 07/11/2025   22:41:02   (   0.03,-137.01) (  -0.46,-139.26)  256.73                80
 07/12/2025   22:24:58   (   0.03,-137.00) (   0.54,-134.73)  259.22                80
 07/14/2025   10:44:05   (  -0.03,-136.99) (   0.66,-139.99)  342.44                80
 07/15/2025   10:28:00   (  -0.03,-136.99) (  -0.35,-135.46)  173.28                80
 07/16/2025   22:47:19   (   0.03,-136.98) (  -0.79,-140.78)  432.53                80
 07/17/2025   22:31:14   (   0.03,-136.97) (   0.22,-136.25)   82.80                80
 07/20/2025   10:31:37   (  -0.04,-136.94) (  -0.02,-136.98)    5.74                80
 07/22/2025   22:34:50   (   0.05,-136.89) (  -0.15,-137.76)   99.18                80
 07/23/2025   22:18:45   (   0.05,-136.87) (   0.86,-133.23)  414.98                80
 07/25/2025   10:37:54   (  -0.06,-136.84) (   0.29,-138.51)  189.36                80