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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2021   06:34:49   (  -0.04, -75.20) (  -0.10, -75.03)   20.43                80
 04/20/2021   18:37:27   (   0.03, -75.18) (  -0.09, -75.64)   52.53                80
 04/21/2021   18:21:09   (   0.03, -75.18) (   0.94, -71.05)  470.42                80
 04/23/2021   06:42:38   (  -0.02, -75.19) (   0.24, -76.23)  118.51                80
 04/24/2021   06:21:01   (  -0.02, -75.19) (  -0.85, -71.65)  404.60                80
 04/25/2021   18:42:36   (   0.02, -75.19) (  -0.36, -76.85)  189.91                80
 04/26/2021   18:26:19   (   0.02, -75.19) (   0.67, -72.27)  333.57                80
 04/28/2021   06:47:48   (  -0.02, -75.22) (   0.45, -77.46)  254.47                80
 04/29/2021   06:26:11   (  -0.02, -75.22) (  -0.57, -72.87)  268.96                80