Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 22.  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)
 03/22/2023   22:30:01   (  -0.01,-137.00) (   0.20,-136.10)  103.06                80
 03/24/2023   10:51:48   (   0.01,-137.01) (   0.97,-141.37)  496.61                80
 03/25/2023   10:30:22   (   0.01,-137.01) (  -0.06,-136.84)   20.03                80
 03/27/2023   22:33:30   (  -0.02,-136.98) (  -0.18,-137.59)   69.80                80
 03/28/2023   22:17:25   (  -0.02,-136.98) (   0.86,-133.06)  446.03                80
 03/30/2023   10:36:31   (   0.02,-136.97) (   0.30,-138.33)  155.10                80
 03/31/2023   10:20:24   (   0.02,-136.96) (  -0.67,-133.79)  360.52                80
 04/01/2023   22:39:39   (  -0.02,-136.93) (  -0.51,-139.09)  246.15                80
 04/02/2023   22:23:33   (  -0.02,-136.92) (   0.53,-134.56)  269.32                80
 04/04/2023   10:42:39   (   0.02,-136.90) (   0.68,-139.82)  332.39                80