Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 12 28.  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)
 12/29/2023   06:37:35   (  -0.03, -75.21) (   0.65, -78.11)  332.13                80
 12/30/2023   06:16:11   (  -0.02, -75.21) (  -0.38, -73.59)  184.85                80
 12/31/2023   18:38:07   (   0.03, -75.22) (  -0.78, -78.89)  418.04                80
 01/01/2024   18:22:02   (   0.03, -75.23) (   0.20, -74.35)   99.67                80
 01/03/2024   06:43:50   (  -0.03, -75.25) (   0.92, -79.63)  499.05                80
 01/04/2024   06:22:25   (  -0.03, -75.26) (  -0.06, -75.09)   18.84                80
 01/06/2024   18:25:35   (   0.02, -75.29) (  -0.10, -75.86)   64.79                80
 01/07/2024   18:09:30   (   0.01, -75.30) (   0.89, -71.32)  453.59                80
 01/09/2024   06:31:17   (  -0.00, -75.32) (   0.28, -76.59)  144.15                80
 01/10/2024   06:09:52   (   0.01, -75.34) (  -0.71, -72.05)  374.07                80