Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 18.  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   06:34:48   (  -0.04, -75.20) (  -0.06, -75.01)   20.51                80
 04/20/2021   18:37:27   (   0.03, -75.18) (  -0.07, -75.64)   52.07                80
 04/21/2021   18:21:09   (   0.03, -75.18) (   0.96, -71.05)  470.93                80
 04/23/2021   06:42:38   (  -0.02, -75.20) (   0.22, -76.23)  117.94                80
 04/24/2021   06:21:00   (  -0.02, -75.20) (  -0.81, -71.64)  405.20                80
 04/25/2021   18:42:36   (   0.02, -75.19) (  -0.34, -76.86)  189.09                80
 04/26/2021   18:26:19   (   0.02, -75.20) (   0.69, -72.27)  334.48                80
 04/28/2021   06:47:47   (  -0.02, -75.22) (   0.48, -77.45)  253.51                80
 04/29/2021   06:26:10   (  -0.02, -75.23) (  -0.55, -72.86)  269.97                80
 04/30/2021   18:47:46   (   0.02, -75.23) (  -0.60, -78.07)  324.13                80
 05/01/2021   18:31:29   (   0.02, -75.23) (   0.43, -73.49)  199.84                80