Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/24/2020   22:43:19   (   0.02,-137.19) (  -0.29,-138.64)  164.79                80
 04/25/2020   22:27:02   (   0.02,-137.19) (   0.70,-134.06)  356.48                80
 04/27/2020   10:48:33   (  -0.02,-137.18) (   0.43,-139.26)  236.79                80
 04/28/2020   10:26:57   (  -0.02,-137.17) (  -0.56,-134.67)  283.85                80
 04/29/2020   22:48:35   (   0.01,-137.14) (  -0.62,-139.90)  314.42                80
 04/30/2020   22:32:20   (   0.01,-137.13) (   0.43,-135.33)  205.88                80
 05/02/2020   10:53:50   (  -0.00,-137.11) (   0.76,-140.52)  388.57                80
 05/03/2020   10:32:14   (  -0.00,-137.09) (  -0.24,-135.93)  131.36                80
 05/04/2020   22:53:53   (   0.00,-137.06) (  -0.89,-141.17)  468.15                80
 05/05/2020   22:37:37   (   0.00,-137.04) (   0.10,-136.58)   51.48                80