Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 2.  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)
 06/03/2023   08:37:58   (   0.00,-104.72) (   0.72,-108.07)  380.89                80
 06/04/2023   08:16:32   (   0.00,-104.72) (  -0.24,-103.53)  134.87                80
 06/05/2023   20:38:30   (   0.00,-104.70) (  -0.90,-108.85)  471.73                80
 06/06/2023   20:22:24   (   0.00,-104.70) (   0.07,-104.31)   44.22                80
 06/09/2023   08:25:27   (  -0.01,-104.70) (   0.09,-105.05)   40.43                80
 06/10/2023   08:04:03   (  -0.01,-104.70) (  -0.94,-100.52)  475.54                80
 06/11/2023   20:25:59   (   0.02,-104.68) (  -0.25,-105.83)  130.63                80
 06/12/2023   20:09:54   (   0.02,-104.69) (   0.78,-101.30)  385.80                80
 06/14/2023   08:31:42   (  -0.02,-104.70) (   0.40,-106.57)  213.23                80
 06/15/2023   08:10:17   (  -0.02,-104.70) (  -0.63,-102.04)  302.84                80