Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/07/2019   22:28:26   (  -0.00,-137.19) (   0.59,-134.46)  310.68                80
 05/09/2019   10:49:58   (  -0.00,-137.20) (   0.56,-139.67)  281.31                80
 05/10/2019   10:28:24   (  -0.00,-137.19) (  -0.47,-135.10)  238.53                80
 05/11/2019   22:50:05   (   0.00,-137.15) (  -0.69,-140.35)  363.69                80
 05/12/2019   22:33:49   (   0.00,-137.14) (   0.29,-135.77)  156.26                80
 05/14/2019   10:55:22   (  -0.00,-137.16) (   0.87,-140.98)  436.00                80
 05/15/2019   10:33:47   (  -0.00,-137.14) (  -0.17,-136.41)   83.38                80
 05/17/2019   22:39:13   (   0.01,-137.08) (  -0.02,-137.08)    2.77                80
 05/20/2019   10:41:51   (  -0.02,-137.07) (   0.13,-137.72)   74.93                80