Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 27.  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)
 12/27/2023   10:38:45   (   0.00,-137.00) (   0.33,-138.45)  165.65                80
 12/28/2023   10:17:20   (   0.00,-137.00) (  -0.70,-133.93)  350.78                80
 12/29/2023   22:39:15   (   0.01,-136.99) (  -0.52,-139.22)  254.98                80
 12/30/2023   22:23:11   (   0.01,-136.99) (   0.52,-134.69)  261.44                80
 01/01/2024   10:44:58   (  -0.01,-137.00) (   0.67,-139.96)  337.83                80
 01/02/2024   10:23:34   (  -0.01,-136.99) (  -0.37,-135.43)  178.41                80
 01/03/2024   22:45:29   (   0.02,-136.97) (  -0.84,-140.72)  427.88                80
 01/04/2024   22:29:25   (   0.02,-136.97) (   0.21,-136.20)   88.07                80
 01/07/2024   10:29:47   (  -0.02,-136.95) (  -0.02,-136.92)    3.35                80
 01/09/2024   22:32:57   (   0.03,-136.90) (  -0.12,-137.70)   90.31                80