Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 12/17/2023   10:23:35   (   0.00,-137.00) (  -0.33,-135.44)  177.71                80
 12/18/2023   22:45:31   (  -0.00,-136.99) (  -0.86,-140.74)  427.66                80
 12/19/2023   22:29:27   (  -0.00,-136.99) (   0.15,-136.21)   88.55                80
 12/22/2023   10:32:30   (   0.00,-136.99) (  -0.01,-136.95)    4.01                80
 12/24/2023   22:33:02   (  -0.00,-136.96) (  -0.15,-137.72)   87.05                80
 12/25/2023   22:16:58   (   0.00,-136.95) (   0.87,-133.19)  428.21                80
 12/27/2023   10:36:05   (   0.00,-136.93) (   0.35,-138.46)  173.58                80
 12/28/2023   10:20:01   (   0.00,-136.92) (  -0.68,-133.93)  341.46                80
 12/29/2023   22:39:16   (  -0.01,-136.89) (  -0.55,-139.22)  265.87                80
 12/30/2023   22:23:11   (  -0.01,-136.87) (   0.48,-134.69)  249.06                80