Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/10/2021   18:33:49   (   0.01, -75.19) (  -0.01, -75.35)   17.88                80
 01/13/2021   06:39:00   (  -0.02, -75.19) (   0.14, -75.95)   86.42                80
 01/14/2021   06:17:23   (  -0.02, -75.19) (  -0.86, -71.35)  436.60                80
 01/15/2021   18:39:00   (   0.03, -75.21) (  -0.30, -76.57)  156.15                80
 01/16/2021   18:22:44   (   0.03, -75.22) (   0.76, -72.00)  367.71                80
 01/18/2021   06:44:12   (  -0.03, -75.24) (   0.42, -77.18)  221.42                80
 01/19/2021   06:22:36   (  -0.03, -75.25) (  -0.64, -72.60)  302.74                80
 01/20/2021   18:44:13   (   0.03, -75.28) (  -0.52, -77.82)  288.91                80
 01/21/2021   18:27:55   (   0.03, -75.30) (   0.49, -73.23)  235.72                80