Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 17.  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) (  -0.05, -75.01)   20.56                80
 04/20/2021   18:37:27   (   0.03, -75.18) (  -0.08, -75.64)   52.40                80
 04/21/2021   18:21:09   (   0.03, -75.18) (   0.95, -71.05)  470.55                80
 04/23/2021   06:42:38   (  -0.02, -75.19) (   0.23, -76.23)  118.27                80
 04/24/2021   06:21:00   (  -0.02, -75.20) (  -0.80, -71.64)  404.85                80
 04/25/2021   18:42:36   (   0.02, -75.19) (  -0.35, -76.85)  189.67                80
 04/26/2021   18:26:19   (   0.02, -75.20) (   0.67, -72.27)  333.83                80
 04/28/2021   06:47:47   (  -0.02, -75.22) (   0.51, -77.44)  254.13                80
 04/29/2021   06:26:11   (  -0.02, -75.22) (  -0.58, -72.87)  269.33                80
 04/30/2021   18:47:46   (   0.02, -75.22) (  -0.63, -78.07)  325.00                80