Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 9 22.  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)
 09/23/2023   08:37:18   (  -0.01,-104.71) (   0.74,-108.03)  379.23                80
 09/24/2023   08:15:54   (  -0.02,-104.71) (  -0.29,-103.51)  136.78                80
 09/25/2023   20:37:50   (   0.01,-104.67) (  -0.90,-108.81)  471.17                80
 09/26/2023   20:21:44   (   0.01,-104.68) (   0.07,-104.27)   45.50                80
 09/29/2023   08:24:47   (  -0.00,-104.71) (   0.07,-105.01)   34.80                80
 09/30/2023   08:03:23   (  -0.00,-104.71) (  -0.96,-100.49)  481.79                80
 10/01/2023   20:25:18   (  -0.00,-104.68) (  -0.27,-105.78)  125.78                80
 10/02/2023   20:09:14   (  -0.01,-104.69) (   0.77,-101.26)  391.10                80
 10/04/2023   08:31:01   (   0.01,-104.72) (   0.39,-106.53)  205.33                80
 10/05/2023   08:09:35   (   0.01,-104.72) (  -0.60,-101.99)  311.22                80
 10/06/2023   20:31:31   (  -0.01,-104.69) (  -0.62,-107.29)  296.89                80