Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 16.  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)
 01/16/2023   22:46:38   (  -0.00,-137.26) (  -0.76,-140.61)  381.41                80
 01/17/2023   22:30:33   (  -0.00,-137.24) (   0.23,-136.07)  133.12                80
 01/19/2023   10:52:20   (   0.00,-137.21) (   0.92,-141.35)  470.99                80
 01/20/2023   10:30:54   (   0.01,-137.19) (  -0.07,-136.81)   42.89                80
 01/22/2023   22:34:04   (  -0.01,-137.12) (  -0.12,-137.58)   52.09                80
 01/23/2023   22:17:59   (  -0.01,-137.10) (   0.88,-133.05)  461.57                80
 01/25/2023   10:39:45   (   0.01,-137.06) (   0.32,-138.31)  143.28                80
 01/26/2023   10:18:20   (   0.01,-137.03) (  -0.69,-133.78)  370.27                80
 01/27/2023   22:40:15   (  -0.01,-136.99) (  -0.48,-139.08)  238.86                80
 01/28/2023   22:24:09   (  -0.01,-136.96) (   0.53,-134.55)  274.50                80
 01/30/2023   10:45:56   (   0.01,-136.91) (   0.66,-139.82)  330.90                80