Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 9 25.  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)
 09/25/2023   06:18:03   (   0.05, -75.21) (  -0.34, -73.39)  207.13                80
 09/26/2023   18:37:19   (  -0.04, -75.20) (  -0.85, -78.69)  398.29                80
 09/27/2023   18:21:14   (  -0.04, -75.20) (   0.18, -74.16)  118.05                80
 09/29/2023   06:40:22   (   0.04, -75.20) (   0.99, -79.43)  482.21                80
 09/30/2023   06:24:17   (   0.04, -75.21) (  -0.05, -74.91)   34.74                80
 10/02/2023   18:24:48   (  -0.04, -75.22) (  -0.13, -75.68)   52.10                80
 10/03/2023   18:08:43   (  -0.04, -75.22) (   0.85, -71.14)  465.15                80
 10/05/2023   06:30:30   (   0.04, -75.24) (   0.30, -76.41)  134.03                80
 10/06/2023   06:09:04   (   0.03, -75.24) (  -0.69, -71.88)  383.40                80
 10/07/2023   18:31:01   (  -0.03, -75.26) (  -0.46, -77.19)  219.54                80
 10/08/2023   18:14:55   (  -0.02, -75.27) (   0.54, -72.65)  298.44                80