Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 6 5.  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)
 06/05/2023   22:23:05   (   0.02,-136.98) (   0.57,-134.55)  277.49                80
 06/07/2023   10:42:12   (  -0.01,-136.98) (   0.62,-139.82)  323.92                80
 06/08/2023   10:26:06   (  -0.00,-136.96) (  -0.35,-135.28)  191.46                80
 06/09/2023   22:45:23   (  -0.01,-136.94) (  -0.84,-140.58)  415.83                80
 06/10/2023   22:29:18   (  -0.01,-136.93) (   0.19,-136.06)   99.40                80
 06/13/2023   10:32:21   (   0.01,-136.90) (  -0.04,-136.80)   12.60                80
 06/15/2023   22:32:52   (   0.00,-136.85) (  -0.17,-137.57)   81.68                80
 06/16/2023   22:16:47   (   0.00,-136.83) (   0.87,-133.04)  432.60                80
 06/18/2023   10:35:55   (  -0.01,-136.81) (   0.31,-138.31)  170.82                80