Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 9 21.  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   10:37:57   (   0.01,-137.01) (   0.30,-138.26)  143.01                80
 09/23/2023   10:16:33   (   0.00,-137.01) (  -0.73,-133.74)  372.41                80
 09/24/2023   22:38:29   (   0.02,-136.99) (  -0.47,-139.04)  234.84                80
 09/25/2023   22:22:25   (   0.01,-136.98) (   0.56,-134.51)  280.80                80
 09/27/2023   10:41:32   (  -0.01,-136.97) (   0.62,-139.78)  320.16                80
 09/28/2023   10:25:28   (  -0.00,-136.96) (  -0.41,-135.26)  195.29                80
 09/29/2023   22:44:43   (   0.00,-136.94) (  -0.83,-140.55)  412.00                80
 09/30/2023   22:28:38   (  -0.00,-136.93) (   0.21,-136.02)  103.23                80
 10/02/2023   10:47:46   (   0.00,-136.91) (   0.96,-141.29)  498.42                80
 10/03/2023   10:31:40   (   0.01,-136.90) (  -0.02,-136.75)   16.42                80