Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 3 20.  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)
 03/20/2023   10:24:12   (  -0.00,-137.01) (  -0.36,-135.33)  190.63                80
 03/21/2023   22:46:07   (   0.00,-137.01) (  -0.80,-140.64)  413.70                80
 03/22/2023   22:30:02   (   0.00,-137.01) (   0.22,-136.11)  103.16                80
 03/24/2023   10:51:48   (  -0.00,-137.01) (   0.95,-141.37)  496.59                80
 03/25/2023   10:30:22   (  -0.00,-137.01) (  -0.02,-136.83)   20.03                80
 03/27/2023   22:33:30   (  -0.00,-136.99) (  -0.16,-137.60)   69.58                80
 03/28/2023   22:17:25   (   0.00,-136.98) (   0.87,-133.07)  446.37                80
 03/30/2023   10:36:31   (  -0.00,-136.97) (   0.29,-138.33)  154.78                80
 03/31/2023   10:20:25   (  -0.00,-136.96) (  -0.68,-133.79)  360.85                80
 04/01/2023   22:39:39   (   0.00,-136.94) (  -0.50,-139.09)  245.63                80
 04/02/2023   22:23:34   (   0.00,-136.93) (   0.54,-134.56)  269.87                80