Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/20/2020   10:57:12   (   0.03,-137.19) (   0.90,-141.10)  445.46                80
 07/21/2020   10:35:35   (   0.03,-137.19) (  -0.11,-136.52)   76.16                80
 07/23/2020   22:38:17   (  -0.03,-137.18) (  -0.04,-137.16)    1.63                80
 07/26/2020   10:40:51   (   0.03,-137.16) (   0.18,-137.78)   70.94                80
 07/27/2020   10:24:35   (   0.03,-137.15) (  -0.83,-133.19)  449.95                80
 07/28/2020   22:43:33   (  -0.03,-137.13) (  -0.32,-138.42)  147.79                80
 07/29/2020   22:27:16   (  -0.03,-137.11) (   0.69,-133.84)  372.60                80
 07/31/2020   10:46:08   (  -0.02,-137.09) (   0.41,-139.05)  223.20                80
 08/01/2020   10:29:51   (  -0.02,-137.07) (  -0.60,-134.46)  296.95                80