Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 23.  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)
 12/24/2023   22:33:01   (  -0.02,-136.97) (  -0.20,-137.71)   85.13                80
 12/25/2023   22:16:57   (  -0.02,-136.96) (   0.83,-133.18)  430.29                80
 12/27/2023   10:38:44   (   0.02,-136.95) (   0.38,-138.44)  171.15                80
 12/28/2023   10:17:19   (   0.02,-136.93) (  -0.66,-133.92)  343.88                80
 12/29/2023   22:39:16   (  -0.01,-136.90) (  -0.50,-139.22)  263.71                80
 12/30/2023   22:20:30   (  -0.00,-136.89) (   0.47,-134.68)  251.15                80
 01/01/2024   10:44:58   (  -0.00,-136.88) (   0.71,-139.95)  350.75                80
 01/02/2024   10:23:33   (  -0.01,-136.86) (  -0.33,-135.42)  163.96                80
 01/03/2024   22:48:08   (   0.01,-136.82) (  -0.88,-140.71)  444.01                80
 01/04/2024   22:26:44   (   0.01,-136.80) (   0.17,-136.19)   70.51                80