Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 12 21.  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)
 12/22/2023   18:09:34   (   0.02, -75.22) (   0.89, -71.35)  440.84                80
 12/24/2023   06:31:21   (  -0.01, -75.21) (   0.32, -76.61)  159.72                80
 12/25/2023   06:09:57   (  -0.01, -75.22) (  -0.71, -72.08)  357.22                80
 12/26/2023   18:31:53   (   0.00, -75.23) (  -0.47, -77.39)  245.84                80
 12/27/2023   18:15:48   (  -0.00, -75.23) (   0.51, -72.84)  271.62                80
 12/29/2023   06:37:36   (   0.00, -75.24) (   0.64, -78.12)  327.51                80
 12/30/2023   06:16:10   (   0.01, -75.25) (  -0.34, -73.58)  190.21                80
 12/31/2023   18:38:07   (  -0.00, -75.27) (  -0.82, -78.89)  411.73                80
 01/01/2024   18:22:02   (  -0.01, -75.29) (   0.22, -74.36)  106.66                80
 01/03/2024   06:43:50   (   0.00, -75.32) (   0.97, -79.62)  490.63                80
 01/04/2024   06:22:25   (   0.00, -75.34) (  -0.07, -75.10)   28.06                80