Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 28.  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)
 12/28/2023   10:17:20   (  -0.01,-137.00) (  -0.69,-133.92)  350.44                80
 12/29/2023   22:39:16   (   0.01,-136.99) (  -0.48,-139.23)  255.08                80
 12/30/2023   22:23:11   (   0.01,-136.98) (   0.50,-134.69)  261.36                80
 01/01/2024   10:44:58   (  -0.00,-136.99) (   0.69,-139.95)  338.11                80
 01/02/2024   10:23:34   (  -0.00,-136.99) (  -0.35,-135.42)  178.09                80
 01/03/2024   22:45:29   (   0.00,-136.97) (  -0.86,-140.72)  428.12                80
 01/04/2024   22:29:24   (   0.00,-136.96) (   0.18,-136.19)   87.74                80
 01/07/2024   10:29:46   (  -0.00,-136.94) (   0.00,-136.92)    2.86                80
 01/09/2024   22:32:57   (   0.01,-136.89) (  -0.15,-137.69)   90.97                80
 01/10/2024   22:16:52   (   0.01,-136.87) (   0.85,-133.15)  423.53                80