Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 12 11.  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)
 12/11/2023   10:38:44   (  -0.00,-137.00) (   0.32,-138.46)  166.43                80
 12/12/2023   10:17:19   (   0.00,-137.00) (  -0.69,-133.93)  350.31                80
 12/13/2023   22:41:55   (  -0.01,-137.00) (  -0.52,-139.23)  254.86                80
 12/14/2023   22:20:31   (  -0.01,-136.99) (   0.49,-134.70)  261.35                80
 12/16/2023   10:44:59   (   0.02,-137.00) (   0.69,-139.97)  338.99                80
 12/17/2023   10:23:35   (   0.02,-136.99) (  -0.32,-135.44)  176.87                80
 12/18/2023   22:48:11   (  -0.02,-136.97) (  -0.87,-140.74)  429.23                80
 12/19/2023   22:26:47   (  -0.02,-136.97) (   0.14,-136.21)   86.46                80
 12/22/2023   10:29:50   (   0.03,-136.95) (   0.02,-136.95)    1.60                80
 12/24/2023   22:35:41   (  -0.04,-136.92) (  -0.24,-137.71)   91.09                80