Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 16.  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)
 12/18/2022   10:51:49   (   0.02,-137.33) (   0.86,-141.13)  432.10                80
 12/19/2022   10:28:10   (   0.02,-137.33) (  -0.29,-136.06)  145.67                80
 12/20/2022   22:46:45   (  -0.02,-137.32) (  -0.71,-140.55)  367.34                80
 12/21/2022   22:28:25   (  -0.02,-137.31) (   0.38,-135.46)  209.77                80
 12/23/2022   10:46:42   (   0.02,-137.29) (   0.63,-139.88)  296.01                80
 12/24/2022   10:23:04   (   0.02,-137.28) (  -0.53,-134.81)  280.50                80
 12/25/2022   22:41:38   (  -0.01,-137.25) (  -0.48,-139.30)  234.46                80
 12/26/2022   22:23:20   (  -0.00,-137.23) (   0.68,-134.23)  341.74                80
 12/28/2022   10:41:36   (   0.00,-137.21) (   0.34,-138.65)  164.49                80
 12/29/2022   10:17:58   (  -0.01,-137.19) (  -0.83,-133.58)  411.72                80