Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 6 29.  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)
 06/29/2023   18:09:19   (   0.02, -75.20) (   0.93, -71.20)  456.39                80
 07/01/2023   06:31:05   (  -0.02, -75.20) (   0.28, -76.46)  143.61                80
 07/02/2023   06:09:41   (  -0.02, -75.20) (  -0.77, -71.93)  373.02                80
 07/03/2023   18:31:36   (   0.02, -75.20) (  -0.43, -77.23)  231.48                80
 07/04/2023   18:15:30   (   0.02, -75.20) (   0.57, -72.70)  285.48                80
 07/06/2023   06:34:38   (  -0.02, -75.21) (   0.58, -77.97)  313.69                80
 07/07/2023   06:18:32   (  -0.01, -75.22) (  -0.42, -73.44)  203.80                80
 07/08/2023   18:37:48   (   0.02, -75.23) (  -0.77, -78.74)  399.26                80
 07/09/2023   18:21:42   (   0.01, -75.25) (   0.24, -74.20)  118.80                80
 07/11/2023   06:40:49   (  -0.02, -75.27) (   0.91, -79.48)  478.85                80
 07/12/2023   06:24:44   (  -0.02, -75.29) (  -0.10, -74.94)   39.40                80