Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 3.  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)
 05/03/2023   22:39:00   (  -0.00,-137.00) (  -0.44,-139.00)  227.13                80
 05/04/2023   22:22:56   (  -0.00,-137.00) (   0.55,-134.46)  288.70                80
 05/06/2023   10:44:45   (   0.00,-137.00) (   0.60,-139.75)  312.84                80
 05/07/2023   10:23:21   (   0.00,-136.99) (  -0.39,-135.21)  202.26                80
 05/08/2023   22:45:18   (  -0.00,-136.97) (  -0.79,-140.52)  405.42                80
 05/09/2023   22:29:13   (   0.00,-136.95) (   0.20,-135.99)  109.07                80
 05/11/2023   10:51:02   (  -0.00,-136.93) (   0.99,-141.26)  494.14                80
 05/12/2023   10:29:38   (  -0.00,-136.92) (  -0.06,-136.74)   20.22                80
 05/14/2023   22:32:50   (  -0.01,-136.87) (  -0.18,-137.51)   74.10                80
 05/15/2023   22:16:47   (  -0.00,-136.85) (   0.88,-132.99)  440.08                80