Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/13/2021   06:39:00   (   0.00, -75.18) (   0.17, -75.94)   85.93                80
 01/14/2021   06:17:22   (   0.01, -75.19) (  -0.83, -71.35)  437.20                80
 01/15/2021   18:39:00   (  -0.01, -75.21) (  -0.32, -76.57)  155.39                80
 01/16/2021   18:22:43   (  -0.01, -75.22) (   0.74, -71.99)  368.45                80
 01/18/2021   06:44:12   (   0.01, -75.23) (   0.45, -77.17)  220.70                80
 01/19/2021   06:22:34   (   0.01, -75.25) (  -0.56, -72.58)  303.40                80
 01/20/2021   18:44:11   (  -0.01, -75.27) (  -0.60, -77.80)  288.14                80
 01/21/2021   18:27:55   (  -0.01, -75.29) (   0.46, -73.22)  236.46                80
 01/23/2021   06:49:23   (   0.02, -75.32) (   0.71, -78.40)  351.34                80
 01/24/2021   06:27:47   (   0.02, -75.34) (  -0.35, -73.82)  173.24                80