Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2023 12 10.  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)
 12/11/2023   18:15:47   (   0.00, -75.21) (   0.53, -72.86)  268.83                80
 12/13/2023   06:34:55   (  -0.00, -75.20) (   0.65, -78.13)  333.35                80
 12/14/2023   06:16:11   (   0.00, -75.20) (  -0.36, -73.59)  182.82                80
 12/15/2023   18:38:07   (  -0.00, -75.20) (  -0.84, -78.89)  420.95                80
 12/16/2023   18:22:02   (  -0.00, -75.21) (   0.17, -74.36)   95.62                80
 12/19/2023   06:22:26   (   0.00, -75.21) (  -0.00, -75.10)   11.63                80
 12/21/2023   18:25:38   (  -0.00, -75.24) (  -0.17, -75.87)   73.54                80
 12/22/2023   18:09:34   (  -0.00, -75.25) (   0.84, -71.34)  444.16                80
 12/24/2023   06:31:22   (   0.01, -75.26) (   0.33, -76.62)  155.31                80