Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 2 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/04/2021   06:19:12   (   0.01, -75.21) (  -0.79, -71.68)  402.14                80
 02/05/2021   18:40:49   (  -0.00, -75.21) (  -0.40, -76.89)  192.23                80
 02/06/2021   18:24:33   (  -0.00, -75.21) (   0.67, -72.32)  330.46                80
 02/08/2021   06:46:00   (  -0.01, -75.21) (   0.54, -77.49)  260.42                80
 02/09/2021   06:24:24   (  -0.01, -75.21) (  -0.53, -72.91)  262.35                80
 02/10/2021   18:46:01   (   0.01, -75.22) (  -0.65, -78.13)  331.47                80
 02/11/2021   18:29:44   (   0.01, -75.23) (   0.41, -73.55)  192.15                80
 02/13/2021   06:51:12   (  -0.02, -75.25) (   0.79, -78.72)  396.60                80
 02/14/2021   06:29:35   (  -0.02, -75.26) (  -0.28, -74.14)  127.38                80
 02/15/2021   18:51:13   (   0.02, -75.28) (  -0.90, -79.36)  465.07                80
 02/16/2021   18:34:55   (   0.02, -75.30) (   0.11, -74.77)   59.60                80