Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/16/2020   22:41:58   (  -0.01,-137.20) (  -0.11,-137.52)   37.45                80
 06/17/2020   22:20:22   (  -0.01,-137.20) (   0.96,-132.95)  484.76                80
 06/19/2020   10:44:32   (   0.00,-137.20) (   0.22,-138.14)  106.63                80
 06/20/2020   10:22:56   (  -0.00,-137.20) (  -0.85,-133.57)  414.89                80
 06/21/2020   22:47:14   (   0.01,-137.19) (  -0.37,-138.78)  182.35                80
 06/22/2020   22:28:19   (   0.01,-137.18) (   0.70,-134.21)  338.79                80
 06/24/2020   10:49:48   (  -0.01,-137.17) (   0.48,-139.40)  254.12                80
 06/25/2020   10:28:12   (  -0.01,-137.16) (  -0.52,-134.82)  266.64                80
 06/26/2020   22:49:51   (   0.01,-137.14) (  -0.63,-140.05)  331.66                80
 06/27/2020   22:33:35   (   0.01,-137.12) (   0.38,-135.47)  188.91                80
 06/29/2020   10:55:04   (  -0.01,-137.10) (   0.80,-140.65)  404.87                80