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)
 09/22/2023   10:37:22   (  -0.00,-137.01) (   0.26,-138.27)  143.34                44
 09/23/2023   10:16:34   (  -0.00,-137.01) (  -0.76,-133.74)  372.44                80
 09/24/2023   22:38:30   (   0.00,-136.99) (  -0.43,-139.05)  234.36                80
 09/25/2023   22:22:24   (   0.00,-136.98) (   0.54,-134.51)  281.21                80
 09/27/2023   10:44:12   (   0.00,-136.97) (   0.64,-139.78)  319.76                80
 09/28/2023   10:22:47   (   0.00,-136.97) (  -0.39,-135.25)  195.66                80
 09/29/2023   22:44:43   (  -0.00,-136.94) (  -0.79,-140.56)  411.58                80
 09/30/2023   22:28:38   (  -0.00,-136.93) (   0.19,-136.02)  103.61                80
 10/02/2023   10:47:45   (  -0.00,-136.92) (   0.98,-141.29)  498.11                80
 10/03/2023   10:31:40   (  -0.00,-136.90) (  -0.01,-136.75)   16.88                80
 10/05/2023   22:32:11   (   0.00,-136.85) (  -0.17,-137.52)   77.48                80