Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 5 31.  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)
 05/31/2023   20:32:14   (   0.00,-104.72) (  -0.61,-107.32)  297.30                80
 06/01/2023   20:16:10   (   0.01,-104.72) (   0.41,-102.79)  219.30                80
 06/03/2023   08:37:58   (  -0.01,-104.73) (   0.72,-108.07)  380.73                80
 06/04/2023   08:16:33   (  -0.01,-104.72) (  -0.30,-103.54)  135.09                80
 06/05/2023   20:38:30   (   0.02,-104.71) (  -0.90,-108.85)  471.34                80
 06/06/2023   20:22:25   (   0.02,-104.71) (   0.12,-104.32)   44.77                80
 06/09/2023   08:25:27   (  -0.00,-104.71) (   0.10,-105.05)   38.95                80
 06/10/2023   08:04:03   (   0.00,-104.71) (  -0.93,-100.52)  477.37                80
 06/11/2023   20:25:59   (  -0.00,-104.70) (  -0.26,-105.83)  128.54                80
 06/12/2023   20:09:54   (  -0.00,-104.70) (   0.77,-101.30)  388.11                80