Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 11.  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)
 01/11/2023   22:40:25   (   0.00,-137.31) (  -0.40,-139.09)  202.73                80
 01/12/2023   22:24:21   (  -0.00,-137.31) (   0.64,-134.57)  312.89                80
 01/14/2023   10:46:07   (   0.00,-137.29) (   0.60,-139.83)  289.55                80
 01/15/2023   10:24:43   (   0.00,-137.28) (  -0.45,-135.30)  225.52                80
 01/16/2023   22:46:38   (  -0.00,-137.26) (  -0.77,-140.60)  381.51                80
 01/17/2023   22:30:34   (  -0.00,-137.24) (   0.28,-136.08)  133.00                80
 01/19/2023   10:52:20   (   0.00,-137.21) (   0.94,-141.34)  471.16                80
 01/20/2023   10:30:55   (   0.01,-137.19) (  -0.11,-136.82)   42.83                80
 01/22/2023   22:34:05   (  -0.01,-137.12) (  -0.10,-137.59)   52.39                80
 01/23/2023   22:18:00   (  -0.01,-137.10) (   0.90,-133.05)  461.26                80
 01/25/2023   10:39:46   (   0.01,-137.06) (   0.31,-138.32)  143.67                80