Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 27.  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)
 08/27/2023   10:22:40   (   0.01,-137.00) (  -0.39,-135.19)  206.18                80
 08/28/2023   22:44:37   (  -0.02,-136.98) (  -0.79,-140.50)  401.02                80
 08/29/2023   22:28:33   (  -0.02,-136.97) (   0.20,-135.97)  114.01                80
 08/31/2023   10:50:21   (   0.02,-136.96) (   1.00,-141.24)  487.95                80
 09/01/2023   10:28:58   (   0.02,-136.95) (  -0.06,-136.72)   27.04                80
 09/03/2023   22:32:10   (  -0.02,-136.91) (  -0.18,-137.49)   66.38                80
 09/04/2023   22:16:06   (  -0.02,-136.89) (   0.88,-132.97)  448.12                80
 09/06/2023   10:37:54   (   0.03,-136.87) (   0.30,-138.24)  154.92                80
 09/07/2023   10:16:30   (   0.03,-136.86) (  -0.70,-133.71)  359.11                80
 09/08/2023   22:38:26   (  -0.03,-136.81) (  -0.52,-139.01)  250.06                80
 09/09/2023   22:22:22   (  -0.04,-136.79) (   0.48,-134.48)  263.72                80