Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2020   18:35:15   (   0.00, -75.20) (  -0.16, -75.88)   77.64                80
 12/05/2020   18:18:59   (   0.00, -75.20) (   0.88, -71.30)  445.40                80
 12/07/2020   06:40:28   (   0.00, -75.20) (   0.28, -76.48)  145.70                80
 12/08/2020   06:18:52   (   0.00, -75.21) (  -0.76, -71.91)  377.42                80
 12/09/2020   18:40:28   (  -0.01, -75.23) (  -0.45, -77.11)  215.22                80
 12/10/2020   18:24:11   (  -0.01, -75.24) (   0.60, -72.54)  308.49                80
 12/12/2020   06:45:41   (   0.01, -75.25) (   0.57, -77.72)  281.33                80
 12/13/2020   06:24:04   (   0.02, -75.26) (  -0.48, -73.14)  242.29                80
 12/14/2020   18:45:41   (  -0.02, -75.28) (  -0.72, -78.35)  350.04                80
 12/15/2020   18:29:24   (  -0.02, -75.30) (   0.33, -73.77)  174.09                80