Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 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)
 08/19/2020   22:29:23   (  -0.03,-137.19) (   0.61,-134.29)  331.15                80
 08/21/2020   10:48:13   (   0.03,-137.18) (   0.55,-139.48)  261.85                80
 08/22/2020   10:31:57   (   0.03,-137.18) (  -0.47,-134.90)  259.75                80
 08/23/2020   22:50:55   (  -0.03,-137.17) (  -0.67,-140.13)  336.39                80
 08/24/2020   22:34:38   (  -0.03,-137.17) (   0.34,-135.55)  184.77                80
 08/26/2020   10:53:29   (   0.02,-137.15) (   0.81,-140.74)  409.45                80
 08/27/2020   10:37:12   (   0.01,-137.13) (  -0.20,-136.16)  111.05                80
 08/28/2020   22:56:11   (   0.01,-137.11) (  -0.94,-141.39)  486.93                80
 08/29/2020   22:39:54   (   0.01,-137.10) (   0.08,-136.81)   33.49                80
 09/01/2020   10:39:48   (  -0.00,-137.06) (   0.06,-137.42)   41.09                80