Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/18/2020   22:44:06   (   0.00,-137.20) (  -0.36,-138.91)  194.48                80
 03/19/2020   22:27:50   (   0.00,-137.20) (   0.63,-134.32)  326.82                80
 03/21/2020   10:49:21   (  -0.01,-137.19) (   0.50,-139.53)  266.53                80
 03/22/2020   10:27:45   (  -0.01,-137.18) (  -0.48,-134.94)  254.42                80
 03/23/2020   22:49:24   (   0.01,-137.17) (  -0.66,-140.18)  343.04                80
 03/24/2020   22:33:09   (   0.01,-137.16) (   0.38,-135.61)  177.93                80
 03/26/2020   10:54:39   (  -0.01,-137.15) (   0.82,-140.80)  415.89                80
 03/27/2020   10:33:04   (  -0.01,-137.13) (  -0.23,-136.22)  104.43                80
 03/28/2020   22:54:42   (   0.01,-137.11) (  -0.96,-141.45)  494.53                80
 03/29/2020   22:38:26   (   0.01,-137.09) (   0.08,-136.87)   25.53                80
 04/01/2020   10:41:01   (  -0.02,-137.04) (   0.08,-137.49)   50.78                80