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   22:36:57   (  -0.00,-137.32) (  -0.17,-138.18)   97.49                80
 12/09/2022   10:28:38   (   0.01,-137.33) (  -0.24,-136.16)  133.37                80
 12/10/2022   22:43:46   (  -0.02,-137.32) (  -0.60,-139.81)  284.41                80
 12/11/2022   22:23:15   (  -0.02,-137.32) (   0.70,-134.20)  355.02                80
 12/13/2022   10:38:07   (   0.01,-137.31) (   0.09,-137.80)   54.29                80
 12/14/2022   22:50:36   (  -0.01,-137.30) (  -0.95,-141.45)  473.60                80
 12/15/2022   22:30:04   (   0.00,-137.29) (   0.30,-135.83)  165.32                80
 12/17/2022   10:44:55   (  -0.00,-137.28) (   0.46,-139.42)  243.64                80
 12/18/2022   10:19:02   (  -0.00,-137.27) (  -0.75,-133.80)  395.10                80
 12/19/2022   22:36:53   (  -0.00,-137.24) (  -0.08,-137.46)   26.17                80