Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/14/2021   06:17:23   (   0.01, -75.18) (  -0.87, -71.35)  436.59                80
 01/15/2021   18:38:59   (  -0.01, -75.19) (  -0.35, -76.56)  156.64                80
 01/16/2021   18:22:43   (  -0.01, -75.20) (   0.71, -71.98)  366.87                80
 01/18/2021   06:44:11   (   0.01, -75.21) (   0.47, -77.16)  222.81                80
 01/19/2021   06:22:35   (   0.01, -75.22) (  -0.59, -72.58)  300.96                80
 01/20/2021   18:44:12   (  -0.01, -75.25) (  -0.57, -77.80)  291.08                80
 01/21/2021   18:27:55   (  -0.01, -75.26) (   0.43, -73.21)  233.20                80
 01/23/2021   06:49:24   (   0.01, -75.28) (   0.69, -78.41)  355.25                80
 01/24/2021   06:27:46   (   0.01, -75.30) (  -0.32, -73.81)  168.95                80
 01/25/2021   18:49:24   (  -0.00, -75.33) (  -0.85, -79.03)  423.01                80
 01/26/2021   18:33:07   (   0.00, -75.34) (   0.21, -74.46)  101.55                80