Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 29.  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)
 05/30/2023   22:32:54   (  -0.01,-136.98) (  -0.15,-137.55)   65.43                80
 05/31/2023   22:16:49   (  -0.00,-136.98) (   0.87,-133.03)  450.03                80
 06/02/2023   10:35:57   (  -0.01,-136.97) (   0.27,-138.31)  151.90                80
 06/03/2023   10:19:52   (  -0.01,-136.95) (  -0.70,-133.76)  362.96                80
 06/04/2023   22:39:09   (   0.01,-136.92) (  -0.44,-139.08)  245.38                80
 06/05/2023   22:23:04   (   0.01,-136.90) (   0.52,-134.54)  269.00                80
 06/07/2023   10:42:11   (  -0.01,-136.88) (   0.67,-139.81)  334.39                80
 06/08/2023   10:26:07   (   0.00,-136.86) (  -0.36,-135.28)  179.70                80
 06/09/2023   22:45:23   (   0.00,-136.82) (  -0.83,-140.59)  429.57                80
 06/10/2023   22:29:17   (  -0.01,-136.79) (   0.15,-136.05)   84.45                80