Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 11 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/15/2021   06:30:55   (   0.00, -75.22) (  -0.60, -72.50)  309.05                80
 11/16/2021   18:52:30   (  -0.00, -75.26) (  -0.56, -77.71)  279.29                80
 11/17/2021   18:36:11   (  -0.01, -75.29) (   0.48, -73.12)  247.25                80
 11/19/2021   06:57:38   (   0.01, -75.32) (   0.66, -78.29)  337.81                80
 11/20/2021   06:35:59   (   0.02, -75.35) (  -0.37, -73.70)  188.78                80
 11/21/2021   18:57:33   (  -0.02, -75.39) (  -0.84, -78.89)  399.01                80
 11/22/2021   18:41:15   (  -0.03, -75.42) (   0.20, -74.30)  127.95                80
 11/24/2021   07:02:41   (   0.03, -75.47) (   0.94, -79.47)  456.35                80
 11/25/2021   06:41:03   (   0.03, -75.50) (  -0.09, -74.87)   70.61                80
 11/27/2021   18:46:20   (  -0.03, -75.58) (   0.00, -75.49)   11.09                80