Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 12/10/2022   10:17:21   (   0.02,-137.33) (  -0.87,-133.44)  443.05                80
 12/11/2022   22:35:54   (  -0.01,-137.31) (  -0.13,-137.93)   69.60                80
 12/14/2022   10:35:55   (  -0.01,-137.30) (   0.02,-137.28)    3.59                80
 12/16/2022   22:30:50   (   0.01,-137.28) (   0.15,-136.70)   65.48                80
 12/18/2022   10:51:49   (  -0.01,-137.27) (   0.86,-141.12)  439.95                80
 12/19/2022   10:28:10   (  -0.01,-137.25) (  -0.29,-136.06)  136.59                80
 12/20/2022   22:49:24   (  -0.00,-137.22) (  -0.77,-140.53)  378.48                80
 12/21/2022   22:28:25   (  -0.00,-137.20) (   0.38,-135.46)  197.49                80