Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 24.  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)
 10/24/2023   10:37:55   (  -0.01,-137.01) (   0.27,-138.28)  144.35                80
 10/25/2023   10:16:33   (  -0.01,-137.01) (  -0.76,-133.76)  371.31                80
 10/26/2023   22:38:31   (   0.01,-137.00) (  -0.48,-139.06)  235.45                80
 10/27/2023   22:22:29   (   0.01,-137.00) (   0.56,-134.54)  280.07                80
 10/29/2023   10:41:39   (  -0.01,-137.00) (   0.61,-139.83)  321.31                80
 10/30/2023   10:25:35   (  -0.00,-137.00) (  -0.37,-135.30)  193.70                80
 10/31/2023   22:47:35   (   0.00,-136.98) (  -0.79,-140.62)  414.31                80
 11/01/2023   22:26:11   (   0.01,-136.97) (   0.20,-136.09)  100.29                80
 11/04/2023   10:29:18   (  -0.01,-136.95) (  -0.03,-136.84)   12.06                80
 11/06/2023   22:35:14   (   0.01,-136.90) (  -0.12,-137.63)   82.51                80