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   (   0.00,-104.75) (   0.08,-105.05)   33.98                80
 04/07/2023   08:04:26   (   0.00,-104.76) (  -0.98,-100.52)  483.43                80
 04/08/2023   20:26:19   (  -0.00,-104.77) (  -0.25,-105.81)  118.40                80
 04/09/2023   20:10:13   (  -0.00,-104.78) (   0.75,-101.27)  399.06                80
 04/11/2023   08:31:58   (   0.01,-104.77) (   0.43,-106.53)  201.12                80
 04/12/2023   08:10:33   (   0.01,-104.77) (  -0.63,-102.01)  315.89                80
 04/13/2023   20:32:26   (  -0.02,-104.78) (  -0.57,-107.30)  286.88                80
 04/14/2023   20:16:19   (  -0.02,-104.78) (   0.43,-102.76)  230.47                80
 04/16/2023   08:38:05   (   0.03,-104.78) (   0.74,-108.02)  369.02                80
 04/17/2023   08:16:38   (   0.03,-104.78) (  -0.27,-103.49)  148.26                80