Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 31.  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)
 03/31/2023   10:17:44   (   0.02,-137.01) (  -0.70,-133.79)  366.59                80
 04/01/2023   22:39:39   (  -0.02,-136.99) (  -0.48,-139.09)  239.46                80
 04/02/2023   22:23:32   (  -0.01,-136.98) (   0.50,-134.55)  276.92                80
 04/04/2023   10:45:18   (   0.01,-136.99) (   0.63,-139.82)  322.37                80
 04/05/2023   10:23:52   (   0.01,-136.98) (  -0.37,-135.28)  193.71                80
 04/06/2023   22:48:26   (  -0.01,-136.95) (  -0.79,-140.59)  413.17                80
 04/07/2023   22:27:00   (  -0.01,-136.94) (   0.21,-136.05)  102.49                80
 04/09/2023   10:48:45   (  -0.01,-136.94) (   0.97,-141.31)  498.44                80
 04/10/2023   10:32:39   (  -0.01,-136.92) (  -0.04,-136.77)   16.59                80
 04/12/2023   22:33:05   (   0.00,-136.85) (  -0.15,-137.53)   77.54                80
 04/13/2023   22:16:59   (  -0.00,-136.82) (   0.86,-132.99)  436.95                80