Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 4 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 04/30/2023   18:34:14   (   0.02, -75.19) (  -0.40, -77.14)  222.32                80
 05/01/2023   18:12:50   (   0.02, -75.19) (   0.58, -72.60)  294.22                80
 05/03/2023   06:37:19   (  -0.02, -75.20) (   0.57, -77.89)  305.67                80
 05/04/2023   06:15:55   (  -0.02, -75.21) (  -0.41, -73.35)  211.06                80
 05/05/2023   18:40:32   (   0.02, -75.22) (  -0.78, -78.66)  392.97                80
 05/06/2023   18:19:09   (   0.02, -75.23) (   0.27, -74.14)  123.87                80
 05/08/2023   06:43:37   (  -0.02, -75.24) (   0.93, -79.42)  475.68                80
 05/09/2023   06:22:13   (  -0.02, -75.25) (  -0.12, -74.90)   41.21                80
 05/11/2023   18:28:06   (   0.01, -75.27) (  -0.06, -75.68)   45.54                80
 05/12/2023   18:06:42   (   0.01, -75.29) (   0.93, -71.15)  471.96                80
 05/14/2023   06:31:10   (  -0.00, -75.31) (   0.26, -76.42)  126.26                80