Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 6.  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)
 06/06/2023   20:22:24   (   0.01,-104.71) (   0.07,-104.31)   45.05                80
 06/09/2023   08:25:27   (   0.01,-104.71) (   0.09,-105.05)   38.70                80
 06/10/2023   08:04:03   (   0.02,-104.71) (  -0.94,-100.52)  477.53                80
 06/11/2023   20:25:59   (  -0.02,-104.70) (  -0.25,-105.83)  127.95                80
 06/12/2023   20:09:53   (  -0.02,-104.70) (   0.73,-101.29)  388.81                80
 06/14/2023   08:31:41   (   0.02,-104.72) (   0.45,-106.56)  210.49                80
 06/15/2023   08:10:16   (   0.02,-104.72) (  -0.58,-102.03)  305.75                80
 06/16/2023   20:32:13   (  -0.00,-104.70) (  -0.59,-107.34)  300.60                80
 06/17/2023   20:16:07   (  -0.01,-104.70) (   0.39,-102.80)  216.02                80
 06/19/2023   08:37:55   (   0.00,-104.72) (   0.72,-108.09)  382.74                80