Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/25/2019   22:44:13   (   0.03,-137.20) (  -0.40,-139.05)  210.77                80
 08/26/2019   22:27:58   (   0.03,-137.19) (   0.66,-134.49)  309.17                80
 08/28/2019   10:49:30   (  -0.03,-137.17) (   0.56,-139.68)  286.61                80
 08/29/2019   10:27:55   (  -0.03,-137.16) (  -0.50,-135.12)  232.98                80
 08/30/2019   22:49:35   (   0.03,-137.14) (  -0.67,-140.36)  366.63                80
 08/31/2019   22:33:20   (   0.03,-137.12) (   0.33,-135.78)  152.79                80
 09/02/2019   10:52:12   (  -0.03,-137.10) (   0.82,-140.99)  443.58                80
 09/03/2019   10:35:57   (  -0.03,-137.08) (  -0.18,-136.42)   75.50                80
 09/05/2019   22:36:02   (   0.03,-137.03) (   0.00,-137.08)    6.70                80