Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 12.  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)
 05/12/2023   10:29:38   (  -0.00,-137.00) (  -0.06,-136.74)   28.99                80
 05/14/2023   22:32:51   (   0.00,-136.99) (  -0.12,-137.52)   60.95                80
 05/15/2023   22:16:46   (   0.00,-136.98) (   0.89,-132.99)  454.75                80
 05/17/2023   10:38:34   (  -0.00,-136.98) (   0.28,-138.27)  147.02                80
 05/18/2023   10:17:10   (  -0.01,-136.97) (  -0.72,-133.74)  368.22                80
 05/19/2023   22:39:07   (   0.01,-136.95) (  -0.43,-139.05)  238.70                80
 05/20/2023   22:23:03   (   0.02,-136.94) (   0.58,-134.52)  276.15                80
 05/22/2023   10:44:50   (  -0.03,-136.93) (   0.64,-139.79)  326.88                80
 05/23/2023   10:26:06   (  -0.03,-136.91) (  -0.37,-135.26)  187.67                80
 05/24/2023   22:45:23   (   0.03,-136.88) (  -0.77,-140.58)  420.27                80
 05/25/2023   22:29:18   (   0.03,-136.87) (   0.19,-136.03)   94.21                80