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)
 12/18/2023   22:45:31   (  -0.00,-136.99) (  -0.86,-140.74)  427.45                80
 12/19/2023   22:29:27   (  -0.01,-136.99) (   0.16,-136.21)   88.83                80
 12/22/2023   10:32:30   (   0.00,-136.99) (  -0.01,-136.95)    4.61                80
 12/24/2023   22:33:02   (  -0.00,-136.96) (  -0.14,-137.73)   86.39                80
 12/25/2023   22:16:57   (  -0.00,-136.95) (   0.82,-133.18)  428.99                80
 12/27/2023   10:36:05   (   0.00,-136.94) (   0.33,-138.46)  172.63                80
 12/28/2023   10:20:00   (   0.00,-136.93) (  -0.64,-133.92)  342.52                80
 12/29/2023   22:39:16   (  -0.01,-136.90) (  -0.52,-139.22)  264.72                80
 12/30/2023   22:23:11   (  -0.01,-136.88) (   0.51,-134.69)  250.31                80