Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 6.  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)
 12/08/2023   22:35:39   (  -0.01,-136.99) (  -0.17,-137.72)   83.55                80
 12/09/2023   22:14:15   (  -0.01,-136.98) (   0.84,-133.19)  432.01                80
 12/11/2023   10:38:43   (   0.02,-136.96) (   0.34,-138.46)  169.96                80
 12/12/2023   10:17:19   (   0.02,-136.95) (  -0.66,-133.93)  344.71                80
 12/13/2023   22:41:55   (  -0.02,-136.92) (  -0.54,-139.23)  263.18                80
 12/14/2023   22:20:31   (  -0.01,-136.90) (   0.47,-134.70)  250.89                80
 12/16/2023   10:44:59   (   0.01,-136.87) (   0.70,-139.97)  352.87                80
 12/17/2023   10:23:34   (  -0.00,-136.85) (  -0.31,-135.44)  160.86                80
 12/18/2023   22:48:11   (  -0.00,-136.81) (  -0.87,-140.74)  447.87                80
 12/19/2023   22:26:46   (   0.00,-136.78) (   0.14,-136.21)   65.85                80