Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 9 22.  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)
 09/23/2023   10:16:34   (  -0.01,-137.01) (  -0.77,-133.75)  372.25                80
 09/24/2023   22:38:30   (   0.02,-136.99) (  -0.42,-139.05)  234.57                80
 09/25/2023   22:22:24   (   0.02,-136.98) (   0.55,-134.51)  280.91                80
 09/27/2023   10:41:32   (  -0.02,-136.98) (   0.63,-139.78)  319.95                80
 09/28/2023   10:25:27   (  -0.01,-136.97) (  -0.40,-135.25)  195.64                80
 09/29/2023   22:44:44   (   0.01,-136.94) (  -0.78,-140.56)  411.42                80
 09/30/2023   22:28:38   (   0.00,-136.93) (   0.20,-136.02)  103.96                80
 10/02/2023   10:47:45   (   0.01,-136.92) (   0.96,-141.29)  497.33                80
 10/03/2023   10:31:40   (   0.02,-136.91) (  -0.02,-136.75)   17.70                80
 10/05/2023   22:32:11   (  -0.02,-136.85) (  -0.15,-137.52)   76.36                80