Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 29.  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)
 05/30/2023   08:10:18   (  -0.00,-104.72) (  -0.60,-102.02)  307.95                80
 05/31/2023   20:32:14   (   0.00,-104.72) (  -0.61,-107.32)  297.32                80
 06/01/2023   20:16:10   (   0.01,-104.72) (   0.41,-102.79)  219.11                80
 06/03/2023   08:37:58   (  -0.01,-104.73) (   0.73,-108.07)  381.03                80
 06/04/2023   08:16:33   (  -0.02,-104.72) (  -0.30,-103.54)  134.63                80
 06/05/2023   20:38:30   (   0.02,-104.70) (  -0.90,-108.85)  472.17                80
 06/06/2023   20:22:25   (   0.02,-104.70) (   0.12,-104.32)   43.76                80
 06/09/2023   08:25:28   (  -0.02,-104.70) (   0.04,-105.06)   40.40                80
 06/10/2023   08:04:03   (  -0.02,-104.70) (  -0.93,-100.52)  475.61                80
 06/11/2023   20:25:59   (   0.02,-104.69) (  -0.26,-105.83)  130.79                80