Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 8.  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)
 01/09/2023   10:39:54   (   0.00,-137.33) (   0.21,-138.32)  112.73                80
 01/10/2023   10:18:29   (   0.01,-137.32) (  -0.76,-133.78)  403.00                80
 01/11/2023   22:40:25   (  -0.01,-137.31) (  -0.41,-139.09)  202.85                80
 01/12/2023   22:24:21   (  -0.01,-137.30) (   0.63,-134.57)  312.69                80
 01/14/2023   10:46:07   (   0.01,-137.29) (   0.61,-139.83)  289.57                80
 01/15/2023   10:24:43   (   0.01,-137.28) (  -0.44,-135.30)  225.43                80
 01/16/2023   22:46:38   (  -0.01,-137.26) (  -0.78,-140.60)  381.91                80
 01/17/2023   22:30:33   (  -0.01,-137.24) (   0.26,-136.08)  132.54                80
 01/19/2023   10:52:20   (   0.02,-137.21) (   0.97,-141.34)  471.42                80
 01/20/2023   10:30:55   (   0.02,-137.18) (  -0.08,-136.82)   42.35                80