Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/16/2020   22:29:15   (   0.01,-137.18) (   0.60,-134.54)  301.78                80
 05/18/2020   10:50:45   (  -0.00,-137.17) (   0.55,-139.73)  291.60                80
 05/19/2020   10:29:09   (  -0.01,-137.16) (  -0.45,-135.15)  229.35                80
 05/20/2020   22:50:48   (   0.01,-137.15) (  -0.70,-140.38)  367.83                80
 05/21/2020   22:34:31   (   0.01,-137.14) (   0.30,-135.80)  152.77                80
 05/23/2020   10:56:02   (  -0.01,-137.11) (   0.84,-140.99)  441.83                80
 05/24/2020   10:34:25   (  -0.01,-137.10) (  -0.16,-136.41)   78.13                80
 05/26/2020   22:37:08   (   0.00,-137.04) (   0.01,-137.06)    1.78                80
 05/29/2020   10:42:21   (   0.01,-136.98) (   0.19,-137.66)   78.12                80