Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 7 25.  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)
 07/27/2023   08:25:00   (  -0.01,-104.73) (   0.03,-105.00)   30.88                80
 07/28/2023   08:03:33   (  -0.01,-104.73) (  -0.94,-100.46)  485.56                80
 07/29/2023   20:25:29   (   0.01,-104.70) (  -0.21,-105.77)  121.37                80
 07/30/2023   20:09:22   (   0.00,-104.69) (   0.76,-101.22)  395.11                80
 08/01/2023   08:31:09   (  -0.00,-104.71) (   0.41,-106.49)  202.99                80
 08/02/2023   08:09:43   (  -0.00,-104.71) (  -0.62,-101.96)  313.17                80
 08/03/2023   20:31:37   (   0.01,-104.68) (  -0.58,-107.25)  294.18                80
 08/04/2023   20:15:32   (   0.01,-104.67) (   0.45,-102.72)  222.62                80
 08/06/2023   08:37:18   (  -0.01,-104.70) (   0.71,-107.99)  374.25                80
 08/07/2023   08:15:52   (  -0.00,-104.70) (  -0.27,-103.45)  142.39                80