Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 9 1.  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)
 09/03/2023   22:32:10   (  -0.01,-136.99) (  -0.14,-137.49)   57.25                80
 09/04/2023   22:16:07   (  -0.01,-136.99) (   0.91,-132.97)  458.51                80
 09/06/2023   10:37:55   (   0.01,-136.98) (   0.27,-138.25)  143.22                80
 09/07/2023   10:16:30   (   0.01,-136.98) (  -0.73,-133.71)  372.03                80
 09/08/2023   22:38:27   (  -0.02,-136.96) (  -0.49,-139.01)  234.75                80
 09/09/2023   22:22:22   (  -0.02,-136.95) (   0.52,-134.48)  280.29                80
 09/11/2023   10:44:11   (   0.02,-136.93) (   0.65,-139.76)  322.15                80
 09/12/2023   10:22:46   (   0.02,-136.92) (  -0.35,-135.23)  192.63                80
 09/13/2023   22:44:42   (  -0.03,-136.89) (  -0.86,-140.53)  414.81                80
 09/14/2023   22:28:38   (  -0.03,-136.88) (   0.15,-136.00)   99.84                80