Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 11 10.  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)
 11/11/2023   22:38:55   (   0.00,-136.99) (  -0.45,-139.17)  246.78                80
 11/12/2023   22:22:50   (   0.00,-136.99) (   0.50,-134.63)  268.41                80
 11/14/2023   10:44:40   (  -0.00,-136.98) (   0.68,-139.90)  334.13                80
 11/15/2023   10:23:16   (  -0.00,-136.96) (  -0.34,-135.38)  180.41                80
 11/16/2023   22:45:14   (  -0.00,-136.93) (  -0.83,-140.69)  427.72                80
 11/17/2023   22:29:10   (  -0.01,-136.92) (   0.14,-136.15)   86.43                80
 11/20/2023   10:29:36   (   0.02,-136.87) (   0.00,-136.91)    4.32                80
 11/22/2023   22:32:49   (  -0.02,-136.81) (  -0.23,-137.68)   98.93                80
 11/23/2023   22:16:45   (  -0.02,-136.79) (   0.80,-133.15)  414.71                80