Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 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)
 03/30/2023   10:39:11   (   0.00,-137.01) (   0.28,-138.33)  150.26                80
 03/31/2023   10:17:44   (   0.00,-137.01) (  -0.70,-133.79)  366.34                80
 04/01/2023   22:39:39   (  -0.00,-136.99) (  -0.48,-139.09)  239.69                80
 04/02/2023   22:23:33   (  -0.00,-136.99) (   0.57,-134.56)  276.78                80
 04/04/2023   10:45:18   (   0.00,-136.99) (   0.62,-139.82)  322.33                80
 04/05/2023   10:23:52   (   0.00,-136.99) (  -0.37,-135.28)  193.84                80
 04/06/2023   22:45:46   (  -0.00,-136.96) (  -0.79,-140.59)  413.03                80
 04/07/2023   22:29:40   (  -0.00,-136.95) (   0.21,-136.05)  102.71                80
 04/09/2023   10:51:25   (   0.01,-136.94) (   0.97,-141.31)  497.70                80
 04/10/2023   10:29:59   (   0.01,-136.92) (  -0.04,-136.77)   17.50                80
 04/12/2023   22:33:05   (  -0.02,-136.85) (  -0.15,-137.53)   76.47                80