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)
 09/01/2023   10:28:57   (   0.02,-137.00) (  -0.04,-136.71)   32.69                80
 09/03/2023   22:32:10   (  -0.02,-137.00) (  -0.14,-137.49)   56.91                80
 09/04/2023   22:16:06   (  -0.02,-136.99) (   0.86,-132.96)  458.83                80
 09/06/2023   10:37:54   (   0.02,-136.99) (   0.32,-138.23)  142.66                80
 09/07/2023   10:16:31   (   0.02,-136.98) (  -0.73,-133.72)  372.65                80
 09/08/2023   22:38:27   (  -0.03,-136.96) (  -0.49,-139.02)  234.21                80
 09/09/2023   22:22:22   (  -0.03,-136.95) (   0.52,-134.48)  280.86                80
 09/11/2023   10:44:11   (   0.04,-136.94) (   0.66,-139.76)  321.35                80
 09/12/2023   10:22:46   (   0.04,-136.92) (  -0.34,-135.23)  193.46                80
 09/13/2023   22:44:43   (  -0.04,-136.90) (  -0.87,-140.53)  414.08                80
 09/14/2023   22:28:38   (  -0.04,-136.89) (   0.14,-136.00)  100.60                80