Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 6.  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)
 12/06/2022   22:40:55   (  -0.01,-137.32) (  -0.43,-139.14)  207.61                80
 12/07/2022   22:22:38   (  -0.01,-137.33) (   0.74,-134.08)  370.42                80
 12/09/2022   10:40:58   (   0.01,-137.33) (   0.30,-138.51)  134.54                80
 12/10/2022   10:17:20   (   0.02,-137.33) (  -0.83,-133.43)  443.23                80
 12/11/2022   22:35:53   (  -0.02,-137.31) (  -0.17,-137.92)   69.35                80
 12/14/2022   10:33:15   (  -0.00,-137.31) (  -0.00,-137.29)    2.52                80
 12/16/2022   22:33:30   (   0.01,-137.28) (   0.11,-136.70)   65.94                80
 12/18/2022   10:51:49   (  -0.01,-137.27) (   0.84,-141.13)  439.33                80
 12/19/2022   10:28:10   (  -0.01,-137.26) (  -0.25,-136.05)  137.32                80