Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/12/2021   06:48:26   (  -0.13, -75.20) (   0.20, -76.64)  163.72                80
 09/13/2021   06:26:49   (  -0.13, -75.20) (  -0.87, -72.05)  359.41                80
 09/14/2021   18:48:23   (   0.13, -75.20) (  -0.36, -77.25)  234.33                80
 09/15/2021   18:32:05   (   0.14, -75.20) (   0.71, -72.66)  289.13                80
 09/17/2021   06:53:33   (  -0.14, -75.21) (   0.45, -77.84)  299.54                80
 09/18/2021   06:31:55   (  -0.15, -75.22) (  -0.61, -73.26)  224.36                80
 09/19/2021   18:56:10   (   0.14, -75.23) (  -0.61, -78.45)  367.92                80
 09/20/2021   18:36:53   (   0.15, -75.24) (   0.45, -73.87)  156.76                61
 09/22/2021   06:58:39   (  -0.14, -75.27) (   0.70, -79.04)  429.79                80
 09/23/2021   06:37:01   (  -0.15, -75.28) (  -0.31, -74.44)   95.19                80
 09/24/2021   19:01:16   (   0.14, -75.31) (  -0.86, -79.65)  495.95                80
 09/25/2021   18:39:39   (   0.14, -75.32) (   0.21, -75.07)   29.31                80