Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 1 12.  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)
 01/13/2023   18:39:16   (   0.05, -75.19) (  -0.73, -78.76)  406.31                80
 01/14/2023   18:23:10   (   0.04, -75.19) (   0.25, -74.22)  110.52                80
 01/16/2023   06:44:58   (  -0.04, -75.20) (   0.92, -79.50)  489.78                80
 01/17/2023   06:23:32   (  -0.03, -75.20) (  -0.07, -74.96)   27.10                80
 01/19/2023   18:26:43   (   0.02, -75.21) (  -0.09, -75.74)   59.79                80
 01/20/2023   18:10:38   (   0.01, -75.22) (   0.91, -71.20)  457.36                80
 01/22/2023   06:32:25   (  -0.00, -75.22) (   0.25, -76.48)  142.27                80
 01/23/2023   06:10:59   (   0.01, -75.23) (  -0.75, -71.94)  375.20                80
 01/24/2023   18:32:55   (   0.02, -75.25) (  -0.44, -77.25)  228.15                80
 01/25/2023   18:16:49   (   0.02, -75.26) (   0.56, -72.71)  289.93                80