Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 4 11.  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)
 04/12/2023   22:33:06   (  -0.00,-137.00) (  -0.15,-137.53)   61.12                80
 04/13/2023   22:17:00   (  -0.01,-137.00) (   0.86,-132.99)  455.83                80
 04/15/2023   10:36:05   (   0.01,-137.00) (   0.31,-138.25)  143.64                80
 04/16/2023   10:19:59   (   0.02,-136.99) (  -0.70,-133.72)  373.14                80
 04/17/2023   22:39:12   (  -0.02,-136.98) (  -0.50,-139.01)  231.72                80
 04/18/2023   22:23:07   (   0.02,-136.98) (   0.58,-134.49)  283.94                80
 04/20/2023   10:42:12   (  -0.03,-136.97) (   0.58,-139.75)  316.09                80
 04/21/2023   10:26:05   (  -0.02,-136.97) (  -0.44,-135.21)  200.15                80
 04/22/2023   22:45:19   (   0.02,-136.94) (  -0.75,-140.51)  405.90                80
 04/23/2023   22:29:11   (   0.02,-136.93) (   0.22,-135.96)  110.00                80
 04/25/2023   10:48:16   (  -0.03,-136.92) (   0.93,-141.23)  491.13                80