Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 5 26.  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)
 05/27/2023   10:48:26   (   0.00,-137.00) (   0.97,-141.31)  491.01                80
 05/28/2023   10:32:22   (   0.01,-137.00) (  -0.05,-136.78)   25.13                80
 05/30/2023   22:32:54   (  -0.01,-136.98) (  -0.14,-137.56)   65.58                80
 05/31/2023   22:16:49   (  -0.01,-136.97) (   0.88,-133.03)  449.87                80
 06/02/2023   10:35:56   (  -0.00,-136.97) (   0.31,-138.30)  151.87                80
 06/03/2023   10:19:52   (  -0.00,-136.95) (  -0.71,-133.77)  362.96                80
 06/04/2023   22:39:08   (   0.01,-136.92) (  -0.48,-139.07)  245.60                80
 06/05/2023   22:23:04   (   0.00,-136.90) (   0.54,-134.55)  268.73                80
 06/07/2023   10:42:11   (  -0.01,-136.88) (   0.65,-139.81)  334.58                80
 06/08/2023   10:26:06   (   0.00,-136.85) (  -0.32,-135.27)  179.53                80