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   18:09:18   (   0.02, -75.20) (   0.90, -71.19)  456.30                80
 07/01/2023   06:31:06   (  -0.02, -75.20) (   0.25, -76.46)  143.73                80
 07/02/2023   06:09:40   (  -0.02, -75.20) (  -0.75, -71.93)  372.83                80
 07/03/2023   18:31:36   (   0.02, -75.20) (  -0.45, -77.23)  231.81                80
 07/04/2023   18:15:30   (   0.02, -75.20) (   0.55, -72.69)  285.12                80
 07/06/2023   06:34:37   (  -0.01, -75.21) (   0.60, -77.97)  314.10                80
 07/07/2023   06:18:32   (  -0.01, -75.22) (  -0.40, -73.43)  203.33                80
 07/08/2023   18:37:47   (   0.01, -75.23) (  -0.79, -78.73)  399.84                80
 07/09/2023   18:21:42   (   0.01, -75.24) (   0.22, -74.20)  118.18                80
 07/11/2023   06:40:49   (  -0.01, -75.26) (   0.93, -79.47)  479.56                80
 07/12/2023   06:24:44   (  -0.01, -75.28) (  -0.08, -74.94)   38.63                80