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   10:45:56   (  -0.01,-137.01) (   0.64,-139.82)  321.38                80
 01/31/2023   10:24:31   (  -0.01,-137.01) (  -0.37,-135.29)  195.15                80
 02/01/2023   22:46:26   (   0.01,-137.00) (  -0.80,-140.60)  410.13                80
 02/02/2023   22:30:21   (   0.02,-137.00) (   0.22,-136.06)  106.05                80
 02/04/2023   10:49:27   (  -0.02,-136.99) (   0.96,-141.33)  494.68                80
 02/05/2023   10:33:21   (  -0.02,-136.99) (  -0.06,-136.80)   21.27                80
 02/07/2023   22:33:50   (   0.03,-136.97) (  -0.13,-137.57)   68.91                80
 02/08/2023   22:17:45   (   0.03,-136.96) (   0.90,-133.04)  446.90                80
 02/10/2023   10:36:51   (  -0.03,-136.95) (   0.27,-138.30)  154.61                80
 02/11/2023   10:20:46   (  -0.03,-136.94) (  -0.75,-133.77)  360.77                80