Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-21
TLE Epoch: 2022 12 9.  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)
 12/09/2022   18:17:20   (   0.00, -75.19) (   0.56, -72.73)  281.50                80
 12/11/2022   06:35:40   (  -0.01, -75.19) (   0.44, -77.16)  224.02                80
 12/12/2022   06:12:02   (   0.00, -75.20) (  -0.69, -72.09)  354.48                80
 12/13/2022   18:30:35   (   0.00, -75.21) (  -0.32, -76.57)  155.42                80
 12/14/2022   18:12:17   (   0.00, -75.22) (   0.81, -71.50)  423.58                80
 12/16/2022   06:30:36   (  -0.01, -75.23) (   0.17, -75.93)   79.91                80
 12/17/2022   06:06:57   (  -0.00, -75.24) (  -0.97, -70.86)  499.49                80
 12/18/2022   18:25:32   (   0.00, -75.27) (  -0.02, -75.35)    9.69                80
 12/21/2022   06:22:52   (   0.00, -75.30) (  -0.15, -74.71)   67.91                80
 12/22/2022   18:41:26   (  -0.01, -75.32) (  -0.86, -79.19)  441.71                80