Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/13/2021   18:55:39   (   0.12, -75.20) (  -0.78, -79.25)  461.04                80
 08/14/2021   18:39:21   (   0.12, -75.18) (   0.22, -74.65)   59.77                80
 08/17/2021   06:39:11   (  -0.13, -75.13) (  -0.10, -75.24)   12.34                80
 08/19/2021   18:41:47   (   0.14, -75.06) (  -0.06, -75.85)   89.97                80
 08/20/2021   18:25:30   (   0.14, -75.05) (   1.00, -71.26)  431.37                80
 08/22/2021   06:44:17   (  -0.15, -75.04) (   0.19, -76.44)  160.07                80
 08/23/2021   06:28:00   (  -0.15, -75.02) (  -0.87, -71.85)  361.80                80
 08/24/2021   18:46:55   (   0.15, -74.99) (  -0.28, -77.06)  234.80                80
 08/25/2021   18:30:37   (   0.15, -74.99) (   0.72, -72.46)  287.75                80