Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 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)
 03/17/2020   10:22:27   (   0.02,-137.20) (  -0.77,-133.67)  402.66                80
 03/18/2020   22:44:06   (  -0.02,-137.20) (  -0.39,-138.90)  194.32                80
 03/19/2020   22:27:50   (  -0.02,-137.19) (   0.60,-134.32)  326.81                80
 03/21/2020   10:49:21   (   0.01,-137.18) (   0.53,-139.52)  266.74                80
 03/22/2020   10:27:45   (   0.01,-137.17) (  -0.51,-134.95)  253.93                80
 03/23/2020   22:49:24   (  -0.01,-137.16) (  -0.70,-140.17)  343.92                80
 03/24/2020   22:33:08   (  -0.00,-137.15) (   0.35,-135.60)  176.78                80
 03/26/2020   10:54:38   (   0.00,-137.13) (   0.85,-140.79)  417.20                80
 03/27/2020   10:33:03   (   0.00,-137.12) (  -0.19,-136.22)  102.87                80
 03/28/2020   22:54:41   (  -0.00,-137.09) (  -1.00,-141.44)  496.47                80
 03/29/2020   22:38:26   (   0.00,-137.07) (   0.04,-136.87)   23.21                80