Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 7 30.  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)
 07/30/2023   20:09:23   (   0.02,-104.70) (   0.78,-101.23)  395.74                80
 08/01/2023   08:31:09   (  -0.03,-104.72) (   0.39,-106.49)  202.17                80
 08/02/2023   08:09:43   (  -0.03,-104.72) (  -0.64,-101.96)  314.27                80
 08/03/2023   20:31:38   (   0.03,-104.69) (  -0.56,-107.26)  292.62                80
 08/04/2023   20:15:32   (   0.03,-104.70) (   0.47,-102.73)  224.50                80
 08/06/2023   08:37:18   (  -0.04,-104.73) (   0.69,-107.99)  372.01                80
 08/07/2023   08:15:53   (  -0.04,-104.73) (  -0.35,-103.46)  144.91                80
 08/08/2023   20:37:47   (   0.04,-104.70) (  -0.84,-108.76)  462.22                80
 08/09/2023   20:21:41   (   0.04,-104.70) (   0.14,-104.22)   54.89                80
 08/12/2023   08:24:42   (  -0.05,-104.74) (  -0.02,-104.96)   24.64                80
 08/13/2023   08:03:15   (  -0.05,-104.74) (  -1.01,-100.42)  492.24                80