Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/21/2019   22:22:36   (   0.03,-137.21) (   0.92,-133.18)  459.06                80
 08/23/2019   10:44:08   (  -0.03,-137.21) (   0.24,-138.39)  134.14                80
 08/24/2019   10:22:33   (  -0.03,-137.21) (  -0.82,-133.82)  386.82                80
 08/25/2019   22:44:13   (   0.04,-137.20) (  -0.40,-139.05)  211.18                80
 08/26/2019   22:27:58   (   0.04,-137.20) (   0.66,-134.49)  309.24                80
 08/28/2019   10:49:31   (  -0.04,-137.19) (   0.49,-139.70)  285.53                80
 08/29/2019   10:27:55   (  -0.04,-137.18) (  -0.50,-135.12)  234.52                80
 08/30/2019   22:49:35   (   0.04,-137.16) (  -0.66,-140.36)  364.65                80
 08/31/2019   22:33:20   (   0.04,-137.15) (   0.34,-135.78)  155.25                80
 09/02/2019   10:54:52   (  -0.04,-137.13) (   0.81,-141.00)  440.05                80
 09/03/2019   10:33:17   (  -0.04,-137.12) (  -0.19,-136.42)   79.51                80