Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 8 4.  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)
 08/04/2023   18:31:07   (   0.00, -75.20) (  -0.41, -77.16)  222.69                80
 08/05/2023   18:15:01   (   0.00, -75.21) (   0.57, -72.61)  295.67                80
 08/07/2023   06:36:47   (  -0.00, -75.23) (   0.58, -77.88)  302.36                80
 08/08/2023   06:15:22   (  -0.00, -75.24) (  -0.45, -73.35)  216.29                80
 08/09/2023   18:37:16   (  -0.00, -75.27) (  -0.73, -78.65)  384.00                80
 08/10/2023   18:21:10   (  -0.00, -75.29) (   0.26, -74.11)  134.99                80
 08/12/2023   06:42:56   (   0.01, -75.32) (   0.89, -79.38)  462.05                80
 08/13/2023   06:21:29   (   0.01, -75.34) (  -0.10, -74.84)   57.16                80
 08/15/2023   18:24:37   (  -0.01, -75.40) (  -0.08, -75.60)   22.63                80
 08/16/2023   18:08:32   (  -0.01, -75.43) (   0.97, -71.07)  497.50                80