Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 9 22.  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)
 09/24/2023   06:34:08   (   0.05, -75.22) (   0.67, -77.92)  308.37                80
 09/25/2023   06:15:23   (   0.05, -75.22) (  -0.36, -73.39)  208.25                80
 09/26/2023   18:37:19   (  -0.04, -75.23) (  -0.83, -78.70)  395.50                80
 09/27/2023   18:21:15   (  -0.04, -75.24) (   0.21, -74.17)  121.83                80
 09/29/2023   06:40:22   (   0.04, -75.25) (   0.97, -79.44)  477.08                80
 09/30/2023   06:24:18   (   0.04, -75.26) (  -0.07, -74.91)   40.87                80
 10/02/2023   18:24:49   (  -0.04, -75.30) (  -0.12, -75.68)   43.36                80
 10/03/2023   18:08:43   (  -0.04, -75.32) (   0.86, -71.14)  474.86                80
 10/05/2023   06:30:30   (   0.03, -75.34) (   0.30, -76.42)  123.01                80
 10/06/2023   06:09:06   (   0.03, -75.36) (  -0.75, -71.89)  395.40                80