Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2021   06:26:49   (  -0.13, -75.20) (  -0.87, -72.05)  359.35                80
 09/14/2021   18:48:23   (   0.13, -75.20) (  -0.36, -77.25)  234.54                80
 09/15/2021   18:32:05   (   0.14, -75.20) (   0.71, -72.66)  288.88                80
 09/17/2021   06:53:33   (  -0.14, -75.21) (   0.45, -77.84)  299.76                80
 09/18/2021   06:31:54   (  -0.15, -75.21) (  -0.56, -73.24)  224.09                80
 09/19/2021   18:56:10   (   0.14, -75.22) (  -0.61, -78.45)  368.34                80
 09/20/2021   18:37:12   (   0.15, -75.24) (   0.46, -73.87)  156.29                80
 09/22/2021   06:58:39   (  -0.14, -75.26) (   0.69, -79.04)  430.22                80
 09/23/2021   06:37:01   (  -0.15, -75.28) (  -0.32, -74.45)   94.69                80
 09/24/2021   19:01:16   (   0.14, -75.30) (  -0.85, -79.65)  496.57                80
 09/25/2021   18:39:39   (   0.14, -75.32) (   0.22, -75.07)   28.75                80