Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 28.  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)
 03/28/2023   22:17:25   (  -0.00,-137.00) (   0.87,-133.06)  448.29                80
 03/30/2023   10:36:31   (   0.01,-137.01) (   0.28,-138.33)  150.10                80
 03/31/2023   10:20:24   (   0.01,-137.01) (  -0.70,-133.79)  366.66                80
 04/01/2023   22:39:39   (  -0.02,-136.99) (  -0.48,-139.09)  239.31                80
 04/02/2023   22:23:32   (  -0.02,-136.99) (   0.51,-134.55)  277.34                80
 04/04/2023   10:45:19   (   0.01,-137.00) (   0.63,-139.82)  321.90                80
 04/05/2023   10:23:52   (  -0.00,-136.99) (  -0.37,-135.28)  194.02                80
 04/06/2023   22:48:26   (   0.02,-136.96) (  -0.79,-140.59)  413.26                80
 04/07/2023   22:29:40   (   0.03,-136.95) (   0.21,-136.05)  102.32                80
 04/09/2023   10:48:45   (  -0.03,-136.94) (   0.98,-141.31)  498.14                80
 04/10/2023   10:32:40   (  -0.03,-136.93) (  -0.09,-136.78)   17.24                80