Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 2.  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)
 01/03/2023   10:52:25   (   0.02,-137.32) (   0.92,-141.32)  456.22                80
 01/04/2023   10:31:00   (   0.02,-137.31) (  -0.11,-136.79)   58.86                80
 01/06/2023   22:34:11   (  -0.02,-137.27) (  -0.10,-137.57)   33.72                80
 01/07/2023   22:18:07   (  -0.01,-137.26) (   0.94,-133.04)  480.96                80
 01/09/2023   10:39:54   (   0.01,-137.24) (   0.25,-138.31)  122.14                80
 01/10/2023   10:18:29   (   0.00,-137.22) (  -0.78,-133.79)  392.13                80
 01/11/2023   22:40:25   (  -0.00,-137.19) (  -0.45,-139.08)  216.21                80
 01/12/2023   22:24:20   (   0.00,-137.17) (   0.59,-134.56)  297.97                80
 01/14/2023   10:46:08   (  -0.00,-137.15) (   0.60,-139.83)  305.70                80
 01/15/2023   10:24:42   (  -0.00,-137.13) (  -0.38,-135.29)  208.04                80