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   18:32:34   (   0.00, -75.20) (   0.00, -77.25)  228.04                 0
 08/05/2023   18:15:01   (   0.00, -75.21) (   0.57, -72.61)  295.71                80
 08/07/2023   06:36:47   (  -0.00, -75.23) (   0.59, -77.88)  302.33                80
 08/08/2023   06:15:22   (  -0.00, -75.24) (  -0.45, -73.35)  216.31                80
 08/09/2023   18:37:16   (  -0.00, -75.27) (  -0.74, -78.65)  383.98                80
 08/10/2023   18:21:10   (  -0.00, -75.29) (   0.25, -74.10)  135.00                80
 08/12/2023   06:42:56   (   0.01, -75.32) (   0.90, -79.37)  462.05                80
 08/13/2023   06:21:29   (   0.01, -75.34) (  -0.08, -74.83)   57.19                80
 08/15/2023   18:24:38   (  -0.01, -75.40) (  -0.04, -75.60)   22.55                80
 08/16/2023   18:08:32   (  -0.01, -75.43) (   0.95, -71.06)  497.43                80
 08/18/2023   06:30:18   (   0.01, -75.47) (   0.19, -76.33)   97.96                80