Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 4 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 04/06/2023   08:25:51   (   0.01,-104.74) (   0.09,-105.04)   34.75                80
 04/07/2023   08:04:26   (   0.01,-104.74) (  -0.96,-100.52)  481.73                80
 04/08/2023   20:26:19   (  -0.01,-104.74) (  -0.26,-105.81)  122.14                80
 04/09/2023   20:10:12   (  -0.02,-104.73) (   0.74,-101.27)  394.51                80
 04/11/2023   08:31:58   (   0.02,-104.72) (   0.44,-106.53)  206.69                80
 04/12/2023   08:10:31   (   0.02,-104.71) (  -0.57,-101.99)  309.26                80
 04/13/2023   20:32:26   (  -0.02,-104.70) (  -0.58,-107.30)  295.82                80
 04/14/2023   20:16:19   (  -0.02,-104.69) (   0.43,-102.76)  220.59                80
 04/16/2023   08:38:04   (   0.02,-104.68) (   0.74,-108.02)  379.93                80
 04/17/2023   08:16:37   (   0.02,-104.68) (  -0.22,-103.47)  136.54                80