Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 29.  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)
 01/30/2023   10:45:57   (  -0.01,-137.01) (   0.60,-139.83)  321.54                80
 01/31/2023   10:24:31   (  -0.02,-137.01) (  -0.41,-135.30)  194.94                80
 02/01/2023   22:46:27   (   0.02,-137.00) (  -0.76,-140.60)  410.43                80
 02/02/2023   22:30:21   (   0.03,-136.99) (   0.25,-136.07)  105.73                80
 02/04/2023   10:49:28   (  -0.03,-136.99) (   0.93,-141.34)  495.09                80
 02/05/2023   10:33:22   (  -0.03,-136.99) (  -0.09,-136.81)   20.90                80
 02/07/2023   22:33:51   (   0.04,-136.96) (  -0.11,-137.57)   69.47                80
 02/08/2023   22:17:45   (   0.04,-136.96) (   0.92,-133.04)  446.25                80
 02/10/2023   10:36:52   (  -0.04,-136.94) (   0.26,-138.31)  155.32                80
 02/11/2023   10:20:46   (  -0.04,-136.93) (  -0.76,-133.78)  359.99                80