Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 10.  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)
 12/11/2022   22:35:54   (  -0.01,-137.31) (  -0.14,-137.93)   69.40                80
 12/14/2022   10:33:15   (   0.00,-137.30) (  -0.03,-137.29)    3.34                80
 12/16/2022   22:33:30   (   0.01,-137.28) (   0.13,-136.70)   65.61                80
 12/18/2022   10:51:48   (  -0.00,-137.27) (   0.88,-141.12)  439.92                80
 12/19/2022   10:28:10   (  -0.00,-137.25) (  -0.27,-136.05)  136.61                80
 12/20/2022   22:46:44   (  -0.01,-137.22) (  -0.73,-140.54)  378.38                80
 12/21/2022   22:28:25   (  -0.01,-137.20) (   0.36,-135.46)  197.56                80
 12/23/2022   10:46:43   (   0.01,-137.17) (   0.59,-139.89)  309.39                80
 12/24/2022   10:23:04   (   0.01,-137.14) (  -0.52,-134.81)  265.85                80