Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 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)
 05/11/2023   10:51:02   (  -0.00,-137.00) (   0.94,-141.27)  486.82                80
 05/12/2023   10:29:38   (  -0.00,-137.00) (  -0.06,-136.74)   28.90                80
 05/14/2023   22:32:51   (   0.00,-136.99) (  -0.11,-137.52)   61.10                80
 05/15/2023   22:16:46   (   0.00,-136.98) (   0.89,-132.99)  454.57                80
 05/17/2023   10:38:34   (  -0.00,-136.98) (   0.28,-138.27)  147.21                80
 05/18/2023   10:17:10   (  -0.01,-136.97) (  -0.73,-133.74)  368.00                80
 05/19/2023   22:39:06   (   0.01,-136.95) (  -0.48,-139.04)  238.95                80
 05/20/2023   22:23:02   (   0.02,-136.94) (   0.54,-134.51)  275.92                80
 05/22/2023   10:44:50   (  -0.02,-136.92) (   0.62,-139.79)  327.06                80
 05/23/2023   10:23:26   (  -0.03,-136.91) (  -0.40,-135.26)  187.43                80