Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 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)
 04/16/2019   22:25:44   (  -0.00,-137.19) (   0.75,-133.77)  389.74                80
 04/18/2019   10:47:17   (   0.00,-137.21) (   0.39,-138.99)  202.77                80
 04/19/2019   10:25:43   (   0.00,-137.20) (  -0.64,-134.42)  317.44                80
 04/20/2019   22:47:23   (  -0.00,-137.17) (  -0.55,-139.66)  283.31                80
 04/21/2019   22:31:09   (  -0.00,-137.17) (   0.48,-135.09)  237.00                80
 04/23/2019   10:52:41   (   0.00,-137.18) (   0.70,-140.30)  355.79                80
 04/24/2019   10:31:06   (  -0.00,-137.17) (  -0.33,-135.73)  163.65                80
 04/25/2019   22:52:47   (   0.00,-137.12) (  -0.86,-140.97)  438.95                80
 04/26/2019   22:36:32   (   0.00,-137.11) (   0.18,-136.40)   80.70                80
 04/29/2019   10:36:30   (   0.00,-137.10) (  -0.04,-137.05)    7.56                80