Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/17/2021   18:39:52   (   0.03, -75.27) (   0.07, -75.19)   10.42                80
 06/20/2021   06:39:40   (  -0.04, -75.28) (   0.08, -75.77)   56.05                80
 06/21/2021   06:23:23   (  -0.03, -75.28) (  -0.96, -71.18)  467.89                80
 06/22/2021   18:42:19   (   0.05, -75.31) (  -0.22, -76.39)  123.81                80
 06/23/2021   18:26:02   (   0.04, -75.32) (   0.83, -71.80)  400.39                80
 06/25/2021   06:44:49   (  -0.06, -75.32) (   0.32, -76.98)  189.11                80
 06/26/2021   06:28:32   (  -0.05, -75.33) (  -0.73, -72.40)  335.29                80
 06/27/2021   18:47:28   (   0.06, -75.36) (  -0.45, -77.60)  255.62                80
 06/28/2021   18:31:10   (   0.06, -75.38) (   0.60, -73.02)  269.56                80