Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 10.  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)
 03/11/2023   22:33:46   (   0.00,-136.99) (  -0.11,-137.63)   72.06                80
 03/12/2023   22:17:41   (   0.00,-136.99) (   0.89,-133.10)  443.70                80
 03/14/2023   10:39:27   (  -0.00,-136.97) (   0.31,-138.36)  158.38                80
 03/15/2023   10:18:01   (  -0.00,-136.96) (  -0.70,-133.83)  356.61                80
 03/16/2023   22:39:57   (   0.01,-136.93) (  -0.47,-139.13)  250.78                80
 03/17/2023   22:23:51   (   0.01,-136.91) (   0.55,-134.60)  263.95                80
 03/19/2023   10:42:58   (  -0.01,-136.89) (   0.63,-139.87)  339.13                80
 03/20/2023   10:26:51   (  -0.01,-136.87) (  -0.34,-135.32)  175.56                80
 03/21/2023   22:46:05   (   0.01,-136.84) (  -0.86,-140.62)  432.09                80
 03/22/2023   22:30:00   (   0.01,-136.82) (   0.17,-136.09)   82.57                80