Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/23/2020   10:47:42   (   0.04,-137.19) (   0.51,-139.21)  230.60                80
 01/24/2020   10:26:07   (   0.04,-137.18) (  -0.52,-134.64)  290.18                80
 01/25/2020   22:50:26   (  -0.05,-137.18) (  -0.68,-139.86)  306.84                80
 01/26/2020   22:28:51   (  -0.05,-137.17) (   0.36,-135.29)  213.80                80
 01/28/2020   10:53:01   (   0.06,-137.15) (   0.81,-140.49)  380.79                80
 01/29/2020   10:31:25   (   0.05,-137.14) (  -0.22,-135.91)  139.54                80
 01/30/2020   22:55:45   (  -0.06,-137.12) (  -0.98,-141.14)  458.26                80
 01/31/2020   22:34:09   (  -0.06,-137.11) (   0.06,-136.57)   61.81                80
 02/03/2020   10:39:24   (   0.07,-137.06) (   0.07,-137.19)   14.47                80