Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 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)
 07/17/2019   10:44:20   (  -0.03,-137.21) (   0.26,-138.40)  135.96                80
 07/18/2019   10:22:46   (  -0.03,-137.21) (  -0.79,-133.83)  384.84                80
 07/19/2019   22:44:26   (   0.03,-137.18) (  -0.38,-139.07)  215.07                80
 07/20/2019   22:28:11   (   0.03,-137.18) (   0.62,-134.50)  305.70                80
 07/22/2019   10:47:03   (  -0.03,-137.19) (   0.55,-139.70)  286.79                80
 07/23/2019   10:30:49   (  -0.03,-137.19) (  -0.50,-135.14)  233.54                80
 07/24/2019   22:49:48   (   0.04,-137.15) (  -0.71,-140.37)  367.53                80
 07/25/2019   22:33:33   (   0.04,-137.14) (   0.34,-135.80)  152.47                80
 07/27/2019   10:52:26   (  -0.04,-137.14) (   0.83,-141.01)  441.26                80
 07/28/2019   10:36:11   (  -0.04,-137.13) (  -0.22,-136.45)   78.03                80