Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 30.  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)
 05/31/2023   22:16:50   (   0.01,-137.00) (   0.92,-133.04)  452.65                80
 06/02/2023   10:35:57   (  -0.02,-137.01) (   0.28,-138.30)  147.28                80
 06/03/2023   10:19:53   (  -0.02,-137.01) (  -0.74,-133.77)  368.59                80
 06/04/2023   22:39:09   (   0.02,-136.99) (  -0.46,-139.08)  238.55                80
 06/05/2023   22:23:04   (   0.01,-136.98) (   0.56,-134.55)  276.80                80
 06/07/2023   10:42:12   (  -0.01,-136.97) (   0.63,-139.82)  324.70                80
 06/08/2023   10:26:07   (  -0.00,-136.96) (  -0.40,-135.29)  190.36                80
 06/09/2023   22:45:24   (   0.01,-136.93) (  -0.79,-140.60)  417.82                80
 06/10/2023   22:29:18   (  -0.00,-136.91) (   0.18,-136.06)   97.16                80
 06/13/2023   10:32:21   (  -0.00,-136.88) (  -0.02,-136.80)    9.81                80