Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 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)
 06/19/2020   10:44:31   (   0.01,-137.20) (   0.23,-138.13)  106.48                80
 06/20/2020   10:22:56   (   0.00,-137.20) (  -0.84,-133.56)  415.17                80
 06/21/2020   22:47:14   (   0.00,-137.19) (  -0.38,-138.78)  181.92                80
 06/22/2020   22:25:39   (   0.01,-137.18) (   0.69,-134.21)  339.31                80
 06/24/2020   10:49:48   (  -0.01,-137.17) (   0.49,-139.40)  253.40                80
 06/25/2020   10:28:12   (  -0.01,-137.17) (  -0.52,-134.82)  267.49                80
 06/26/2020   22:52:31   (   0.00,-137.15) (  -0.63,-140.05)  330.53                80
 06/27/2020   22:30:54   (   0.00,-137.13) (   0.38,-135.47)  190.18                80
 06/29/2020   10:55:04   (  -0.00,-137.12) (   0.80,-140.65)  403.41                80
 06/30/2020   10:33:27   (  -0.01,-137.10) (  -0.21,-136.07)  116.83                80
 07/01/2020   22:55:06   (   0.01,-137.07) (  -0.93,-141.30)  482.43                80
 07/02/2020   22:38:50   (   0.01,-137.05) (   0.08,-136.72)   37.44                80