Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/15/2019   22:22:48   (   0.02,-137.19) (   0.91,-133.19)  455.98                80
 07/17/2019   10:44:21   (  -0.03,-137.21) (   0.25,-138.40)  135.89                80
 07/18/2019   10:22:46   (  -0.03,-137.21) (  -0.80,-133.83)  384.92                80
 07/19/2019   22:44:27   (   0.03,-137.18) (  -0.36,-139.08)  215.02                80
 07/20/2019   22:28:11   (   0.03,-137.18) (   0.63,-134.50)  305.78                80
 07/22/2019   10:47:03   (  -0.03,-137.19) (   0.54,-139.71)  286.61                80
 07/23/2019   10:30:49   (  -0.03,-137.19) (  -0.51,-135.14)  233.75                80
 07/24/2019   22:49:48   (   0.04,-137.15) (  -0.70,-140.37)  367.34                80
 07/25/2019   22:33:34   (   0.03,-137.14) (   0.35,-135.81)  152.69                80
 07/27/2019   10:52:26   (  -0.04,-137.15) (   0.82,-141.02)  440.98                80
 07/28/2019   10:36:11   (  -0.04,-137.13) (  -0.17,-136.44)   78.34                80