Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 5 17.  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)
 05/17/2023   18:15:38   (   0.01, -75.19) (   0.57, -72.66)  288.11                80
 05/19/2023   06:37:26   (  -0.02, -75.20) (   0.60, -77.94)  312.57                80
 05/20/2023   06:16:02   (  -0.02, -75.20) (  -0.40, -73.41)  203.76                80
 05/21/2023   18:37:59   (   0.03, -75.20) (  -0.76, -78.72)  400.86                80
 05/22/2023   18:21:55   (   0.03, -75.21) (   0.25, -74.19)  115.85                80
 05/24/2023   06:43:43   (  -0.03, -75.22) (   0.91, -79.47)  483.75                80
 05/25/2023   06:22:18   (  -0.03, -75.23) (  -0.10, -74.94)   33.38                80
 05/27/2023   18:25:31   (   0.03, -75.26) (  -0.04, -75.72)   52.30                80
 05/28/2023   18:09:27   (   0.03, -75.28) (   0.97, -71.20)  465.67                80
 05/30/2023   06:31:14   (  -0.04, -75.30) (   0.24, -76.46)  132.24                80