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   20:22:25   (   0.01,-104.71) (   0.12,-104.32)   44.97                80
 06/09/2023   08:25:27   (   0.01,-104.71) (   0.10,-105.05)   38.70                80
 06/10/2023   08:04:02   (   0.02,-104.71) (  -0.93,-100.52)  477.57                80
 06/11/2023   20:25:59   (  -0.02,-104.70) (  -0.26,-105.83)  127.81                80
 06/12/2023   20:09:53   (  -0.02,-104.70) (   0.72,-101.29)  388.96                80
 06/14/2023   08:31:42   (   0.01,-104.72) (   0.40,-106.57)  210.37                80
 06/15/2023   08:10:16   (   0.01,-104.72) (  -0.58,-102.03)  305.89                80
 06/16/2023   20:32:12   (  -0.00,-104.70) (  -0.60,-107.34)  300.39                80
 06/17/2023   20:16:08   (  -0.00,-104.71) (   0.44,-102.81)  216.25                80
 06/19/2023   08:37:55   (  -0.00,-104.72) (   0.73,-108.08)  382.48                80
 06/20/2023   08:16:30   (   0.01,-104.72) (  -0.25,-103.55)  133.95                80