Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 7 27.  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   08:24:59   (  -0.01,-104.73) (   0.06,-105.00)   30.59                80
 07/28/2023   08:03:34   (  -0.01,-104.73) (  -0.96,-100.47)  485.70                80
 07/29/2023   20:25:28   (   0.01,-104.70) (  -0.25,-105.76)  121.24                80
 07/30/2023   20:09:23   (   0.00,-104.69) (   0.78,-101.23)  395.20                80
 08/01/2023   08:31:09   (   0.00,-104.71) (   0.39,-106.49)  202.93                80
 08/02/2023   08:09:42   (   0.00,-104.70) (  -0.59,-101.95)  313.24                80
 08/03/2023   20:31:37   (  -0.00,-104.67) (  -0.61,-107.25)  294.12                80
 08/04/2023   20:15:31   (  -0.00,-104.67) (   0.42,-102.72)  222.61                80
 08/06/2023   08:37:18   (   0.01,-104.70) (   0.74,-107.98)  374.41                80
 08/07/2023   08:15:52   (   0.01,-104.70) (  -0.30,-103.45)  142.19                80
 08/08/2023   20:37:45   (  -0.01,-104.66) (  -0.95,-108.74)  465.15                80
 08/09/2023   20:21:40   (  -0.01,-104.66) (   0.09,-104.21)   51.69                80