Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 8 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)
 08/02/2023   22:32:18   (  -0.01,-136.97) (  -0.12,-137.49)   58.69                80
 08/03/2023   22:16:12   (  -0.01,-136.96) (   0.91,-132.96)  457.10                80
 08/05/2023   10:37:58   (   0.02,-136.96) (   0.31,-138.21)  143.77                80
 08/06/2023   10:16:32   (   0.02,-136.94) (  -0.72,-133.68)  371.73                80
 08/07/2023   22:38:27   (  -0.02,-136.91) (  -0.47,-138.98)  235.12                80
 08/08/2023   22:22:20   (  -0.02,-136.90) (   0.51,-134.44)  280.14                80
 08/10/2023   10:44:06   (   0.02,-136.88) (   0.65,-139.71)  321.61                80
 08/11/2023   10:22:40   (   0.02,-136.86) (  -0.33,-135.16)  193.14                80
 08/12/2023   22:44:34   (  -0.03,-136.82) (  -0.84,-140.46)  415.00                80
 08/13/2023   22:28:28   (  -0.03,-136.80) (   0.14,-135.92)   99.59                80