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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/01/2021   06:57:12   (  -0.13, -75.19) (   0.67, -78.84)  415.30                80
 09/02/2021   06:35:33   (  -0.14, -75.16) (  -0.33, -74.24)  104.76                80
 09/03/2021   18:57:08   (   0.14, -75.12) (  -0.83, -79.45)  493.54                80
 09/04/2021   18:40:50   (   0.14, -75.10) (   0.17, -74.85)   27.07                80
 09/07/2021   06:43:20   (  -0.15, -75.04) (  -0.06, -75.44)   45.83                80
 09/08/2021   06:21:41   (  -0.15, -75.02) (  -1.06, -70.85)  475.11                80
 09/09/2021   18:43:17   (   0.15, -74.99) (  -0.10, -76.05)  121.88                80
 09/10/2021   18:26:58   (   0.15, -74.97) (   0.91, -71.46)  399.39                80
 09/12/2021   06:48:26   (  -0.15, -74.94) (   0.21, -76.64)  193.19                80
 09/13/2021   06:26:48   (  -0.15, -74.92) (  -0.80, -72.05)  327.96                80
 09/14/2021   18:48:23   (   0.16, -74.89) (  -0.36, -77.25)  269.02                80