Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2020   18:45:40   (   0.01, -75.15) (  -0.72, -78.35)  364.33                80
 12/15/2020   18:29:24   (   0.00, -75.15) (   0.33, -73.77)  158.54                80
 12/17/2020   06:50:53   (  -0.00, -75.16) (   0.83, -78.95)  432.42                80
 12/18/2020   06:29:16   (   0.00, -75.16) (  -0.16, -74.36)   90.82                80
 12/20/2020   18:34:36   (  -0.01, -75.19) (   0.02, -74.99)   22.39                80
 12/23/2020   06:37:08   (   0.01, -75.23) (   0.09, -75.60)   42.52                80
 12/24/2020   06:15:32   (   0.01, -75.24) (  -0.97, -71.02)  481.81                80
 12/25/2020   18:37:08   (  -0.01, -75.28) (  -0.22, -76.24)  109.33                80
 12/26/2020   18:20:52   (  -0.01, -75.30) (   0.84, -71.66)  415.40                80