Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/25/2021   18:42:17   (   0.10, -75.20) (   0.11, -75.04)   17.60                80
 09/28/2021   06:44:46   (  -0.11, -75.20) (   0.01, -75.62)   48.77                80
 09/29/2021   06:23:08   (  -0.11, -75.20) (  -1.06, -71.04)  474.68                80
 09/30/2021   18:47:23   (   0.11, -75.21) (  -0.11, -76.24)  117.77                80
 10/01/2021   18:25:45   (   0.12, -75.22) (   0.90, -71.65)  406.11                80
 10/03/2021   06:49:52   (  -0.11, -75.23) (   0.23, -76.83)  182.21                80
 10/04/2021   06:28:14   (  -0.12, -75.23) (  -0.79, -72.23)  341.90                80
 10/05/2021   18:52:29   (   0.11, -75.25) (  -0.39, -77.44)  249.62                80
 10/06/2021   18:30:52   (   0.12, -75.26) (   0.68, -72.86)  275.02                80