Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2024 4 20.  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)
 04/20/2024   22:23:37   (  -0.00,-136.99) (   0.50,-134.64)  268.18                80
 04/22/2024   10:45:26   (   0.01,-137.00) (   0.64,-139.91)  331.64                80
 04/23/2024   10:24:00   (   0.00,-136.99) (  -0.34,-135.37)  184.40                80
 04/24/2024   22:45:57   (  -0.00,-136.97) (  -0.81,-140.67)  421.70                80
 04/25/2024   22:29:51   (  -0.00,-136.96) (   0.17,-136.13)   93.87                80
 04/28/2024   10:32:53   (   0.02,-136.93) (   0.01,-136.86)    7.78                80
 04/30/2024   22:33:23   (  -0.02,-136.87) (  -0.18,-137.62)   85.30                80
 05/01/2024   22:17:17   (  -0.02,-136.85) (   0.83,-133.08)  429.38                80
 05/03/2024   10:36:24   (   0.02,-136.82) (   0.37,-138.34)  173.14                80