Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2022 12 18.  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)
 12/19/2022   10:28:09   (   0.00,-136.93) (  -0.22,-136.04)  101.80                80
 12/20/2022   22:46:43   (   0.00,-136.90) (  -0.78,-140.53)  412.74                80
 12/21/2022   22:28:24   (   0.00,-136.89) (   0.31,-135.45)  164.29                80
 12/23/2022   10:46:42   (  -0.00,-136.89) (   0.64,-139.88)  340.22                80
 12/24/2022   10:23:03   (   0.00,-136.87) (  -0.46,-134.80)  236.21                80
 12/25/2022   22:41:37   (  -0.00,-136.83) (  -0.55,-139.29)  280.12                80
 12/26/2022   22:23:18   (  -0.01,-136.81) (   0.55,-134.21)  296.32                80
 12/28/2022   10:41:35   (   0.01,-136.80) (   0.41,-138.63)  208.33                80
 12/29/2022   10:17:55   (   0.01,-136.78) (  -0.70,-133.55)  367.91                80
 12/30/2022   22:36:30   (  -0.01,-136.73) (  -0.31,-138.04)  148.93                80
 12/31/2022   22:18:10   (  -0.01,-136.71) (   0.80,-132.96)  427.24                80