Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 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)
 06/24/2020   10:49:47   (   0.01,-137.20) (   0.52,-139.39)  250.32                80
 06/25/2020   10:28:12   (   0.01,-137.19) (  -0.54,-134.82)  271.25                80
 06/26/2020   22:52:30   (  -0.02,-137.18) (  -0.67,-140.04)  325.77                80
 06/27/2020   22:30:55   (  -0.02,-137.18) (   0.40,-135.47)  195.56                80
 06/29/2020   10:55:04   (   0.02,-137.17) (   0.78,-140.65)  397.02                80
 06/30/2020   10:33:28   (   0.01,-137.16) (  -0.22,-136.07)  123.78                80
 07/01/2020   22:57:47   (  -0.00,-137.14) (  -0.92,-141.31)  474.62                80
 07/02/2020   22:36:10   (   0.00,-137.12) (   0.09,-136.72)   45.67                80
 07/05/2020   10:38:44   (  -0.01,-137.09) (   0.03,-137.34)   28.36                80
 07/06/2020   10:22:28   (  -0.01,-137.07) (  -0.98,-132.75)  491.75                80
 07/07/2020   22:41:26   (   0.01,-137.04) (  -0.21,-137.98)  107.44                80