Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 5 15.  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)
 05/16/2023   18:34:22   (   0.02, -75.19) (  -0.44, -77.19)  228.50                80
 05/17/2023   18:12:59   (   0.03, -75.19) (   0.62, -72.67)  287.76                80
 05/19/2023   06:37:26   (  -0.03, -75.20) (   0.61, -77.94)  312.69                80
 05/20/2023   06:16:03   (  -0.03, -75.20) (  -0.46, -73.42)  203.74                80
 05/21/2023   18:40:39   (   0.03, -75.20) (  -0.76, -78.72)  400.73                80
 05/22/2023   18:19:14   (   0.03, -75.21) (   0.25, -74.19)  116.07                80
 05/24/2023   06:43:43   (  -0.02, -75.22) (   0.91, -79.47)  483.22                80
 05/25/2023   06:22:18   (  -0.02, -75.23) (  -0.10, -74.94)   34.02                80
 05/27/2023   18:28:10   (   0.01, -75.26) (  -0.09, -75.71)   51.40                80
 05/28/2023   18:06:46   (   0.01, -75.28) (   0.93, -71.18)  466.53                80