Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 1 2.  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)
 01/03/2023   10:52:24   (  -0.01,-136.92) (   0.97,-141.31)  499.73                80
 01/04/2023   10:30:59   (  -0.01,-136.91) (  -0.05,-136.78)   15.34                80
 01/06/2023   22:34:10   (   0.02,-136.87) (  -0.16,-137.55)   78.50                80
 01/07/2023   22:18:06   (   0.02,-136.86) (   0.88,-133.03)  436.29                80
 01/09/2023   10:39:53   (  -0.03,-136.85) (   0.31,-138.30)  165.55                80
 01/10/2023   10:18:28   (  -0.03,-136.83) (  -0.72,-133.77)  348.94                80
 01/11/2023   22:40:24   (   0.03,-136.79) (  -0.51,-139.07)  260.50                80
 01/12/2023   22:24:19   (   0.03,-136.78) (   0.53,-134.55)  253.92                80
 01/14/2023   10:46:07   (  -0.04,-136.76) (   0.65,-139.82)  348.44                80
 01/15/2023   10:24:42   (  -0.04,-136.74) (  -0.38,-135.29)  165.42                80