Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/21/2021   18:48:46   (   0.03, -75.20) (  -0.24, -76.39)  135.60                80
 10/22/2021   18:27:07   (   0.03, -75.20) (   0.78, -71.79)  388.21                80
 10/24/2021   06:51:14   (  -0.02, -75.20) (   0.36, -76.97)  200.43                80
 10/25/2021   06:29:35   (  -0.03, -75.21) (  -0.66, -72.37)  323.30                80
 10/26/2021   18:53:50   (   0.02, -75.22) (  -0.53, -77.57)  268.93                80
 10/27/2021   18:32:12   (   0.02, -75.22) (   0.50, -72.98)  255.18                80
 10/29/2021   06:56:18   (  -0.02, -75.23) (   0.64, -78.15)  332.55                80
 10/30/2021   06:34:40   (  -0.02, -75.24) (  -0.38, -73.56)  191.67                80
 10/31/2021   18:58:55   (   0.02, -75.26) (  -0.80, -78.76)  399.74                80
 11/01/2021   18:37:18   (   0.02, -75.27) (   0.29, -74.18)  125.11                80
 11/03/2021   07:01:23   (  -0.01, -75.30) (   0.91, -79.34)  461.17                80