Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 5 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)
 05/05/2023   18:40:32   (   0.02, -75.19) (  -0.78, -78.66)  396.17                80
 05/06/2023   18:19:09   (   0.02, -75.20) (   0.26, -74.14)  120.19                80
 05/08/2023   06:43:37   (  -0.02, -75.20) (   0.93, -79.41)  480.40                80
 05/09/2023   06:22:13   (  -0.02, -75.20) (  -0.12, -74.89)   36.04                80
 05/11/2023   18:25:26   (   0.01, -75.22) (  -0.07, -75.67)   51.74                80
 05/12/2023   18:09:22   (   0.01, -75.22) (   0.93, -71.14)  465.31                80
 05/14/2023   06:31:10   (  -0.01, -75.24) (   0.26, -76.42)  133.87                80
 05/15/2023   06:09:46   (  -0.01, -75.25) (  -0.74, -71.88)  383.60                80
 05/16/2023   18:31:43   (   0.01, -75.28) (  -0.43, -77.20)  218.98                80
 05/17/2023   18:15:38   (   0.01, -75.29) (   0.58, -72.67)  298.98                80