Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/19/2021   06:46:09   (  -0.05, -75.20) (   0.06, -75.78)   66.65                80
 10/20/2021   06:24:31   (  -0.05, -75.20) (  -0.96, -71.19)  456.83                80
 10/21/2021   18:48:46   (   0.04, -75.20) (  -0.23, -76.39)  136.05                80
 10/22/2021   18:27:07   (   0.04, -75.20) (   0.79, -71.80)  387.78                80
 10/24/2021   06:51:14   (  -0.03, -75.21) (   0.36, -76.97)  200.17                80
 10/25/2021   06:29:35   (  -0.04, -75.22) (  -0.67, -72.37)  323.63                80
 10/26/2021   18:53:51   (   0.03, -75.22) (  -0.52, -77.58)  268.87                80
 10/27/2021   18:32:13   (   0.03, -75.23) (   0.56, -73.00)  255.27                80
 10/29/2021   06:56:18   (  -0.02, -75.25) (   0.64, -78.15)  331.82                80
 10/30/2021   06:34:40   (  -0.03, -75.25) (  -0.38, -73.56)  192.49                80
 10/31/2021   18:58:55   (   0.02, -75.27) (  -0.80, -78.76)  399.16                80