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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/02/2021   06:40:56   (  -0.04, -75.21) (   0.15, -75.96)   85.85                80
 04/03/2021   06:19:19   (  -0.04, -75.20) (  -0.87, -71.37)  436.49                80
 04/04/2021   18:40:55   (   0.03, -75.20) (  -0.30, -76.58)  157.62                80
 04/05/2021   18:24:37   (   0.03, -75.20) (   0.72, -71.99)  365.45                80
 04/07/2021   06:46:06   (  -0.02, -75.21) (   0.45, -77.17)  224.39                80
 04/08/2021   06:24:29   (  -0.02, -75.21) (  -0.63, -72.59)  298.98                80
 04/09/2021   18:46:05   (   0.01, -75.22) (  -0.59, -77.79)  293.83                80
 04/10/2021   18:29:48   (   0.01, -75.23) (   0.49, -73.22)  230.28                80
 04/12/2021   06:51:16   (  -0.01, -75.25) (   0.69, -78.39)  357.85                80
 04/13/2021   06:29:39   (  -0.02, -75.27) (  -0.34, -73.81)  166.25                80
 04/14/2021   18:51:15   (   0.01, -75.28) (  -0.82, -79.02)  425.91                80
 04/15/2021   18:34:58   (   0.02, -75.30) (   0.21, -74.43)   98.67                80