Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 28.  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)
 05/29/2023   08:31:43   (   0.01,-104.72) (   0.40,-106.55)  208.07                80
 05/30/2023   08:10:18   (   0.01,-104.72) (  -0.62,-102.02)  308.17                80
 05/31/2023   20:32:14   (  -0.01,-104.72) (  -0.58,-107.33)  297.34                80
 06/01/2023   20:16:10   (  -0.01,-104.72) (   0.44,-102.80)  219.08                80
 06/03/2023   08:37:57   (   0.01,-104.72) (   0.76,-108.06)  380.90                80
 06/04/2023   08:16:33   (   0.01,-104.72) (  -0.26,-103.54)  134.82                80
 06/05/2023   20:38:29   (  -0.00,-104.70) (  -0.93,-108.84)  472.12                80
 06/06/2023   20:22:25   (   0.00,-104.70) (   0.09,-104.31)   43.67                80
 06/09/2023   08:25:27   (  -0.01,-104.70) (   0.07,-105.06)   40.67                80
 06/10/2023   08:04:03   (  -0.01,-104.69) (  -0.96,-100.53)  475.14                80