Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 6 3.  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,-104.73) (   0.73,-108.07)  380.81                80
 06/04/2023   08:16:32   (   0.00,-104.72) (  -0.23,-103.53)  135.12                80
 06/05/2023   20:38:30   (  -0.01,-104.71) (  -0.91,-108.85)  471.17                80
 06/06/2023   20:22:24   (  -0.01,-104.70) (   0.06,-104.31)   44.94                80
 06/09/2023   08:25:27   (   0.02,-104.71) (   0.10,-105.05)   39.11                80
 06/10/2023   08:04:02   (   0.02,-104.70) (  -0.93,-100.52)  476.82                80
 06/11/2023   20:25:59   (  -0.02,-104.69) (  -0.26,-105.83)  129.21                80
 06/12/2023   20:09:53   (  -0.02,-104.69) (   0.72,-101.29)  387.37                80
 06/14/2023   08:31:41   (   0.02,-104.71) (   0.46,-106.56)  211.53                80
 06/15/2023   08:10:16   (   0.03,-104.70) (  -0.57,-102.03)  304.71                80
 06/16/2023   20:32:12   (  -0.03,-104.69) (  -0.60,-107.34)  301.79                80