Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/07/2021   06:43:20   (  -0.14, -75.18) (  -0.10, -75.45)   29.62                80
 09/08/2021   06:21:42   (  -0.14, -75.18) (  -1.10, -70.85)  493.20                80
 09/09/2021   18:43:17   (   0.14, -75.18) (  -0.06, -76.06)   99.93                80
 09/10/2021   18:26:59   (   0.14, -75.18) (   1.00, -71.48)  423.20                80
 09/12/2021   06:48:27   (  -0.14, -75.17) (   0.16, -76.65)  167.47                80
 09/13/2021   06:26:48   (  -0.15, -75.17) (  -0.84, -72.05)  355.52                80
 09/14/2021   18:48:24   (   0.15, -75.17) (  -0.32, -77.26)  237.64                80
 09/15/2021   18:32:05   (   0.15, -75.18) (   0.69, -72.66)  285.69                80
 09/17/2021   06:53:33   (  -0.16, -75.18) (   0.41, -77.85)  303.98                80
 09/18/2021   06:31:55   (  -0.16, -75.18) (  -0.59, -73.26)  219.76                80
 09/19/2021   18:56:10   (   0.16, -75.20) (  -0.57, -78.46)  371.99                80