Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/02/2020   22:48:49   (  -0.03,-137.20) (  -0.58,-139.68)  283.24                80
 08/03/2020   22:32:33   (  -0.03,-137.20) (   0.44,-135.10)  238.70                80
 08/05/2020   10:51:23   (   0.02,-137.20) (   0.72,-140.29)  352.97                80
 08/06/2020   10:32:27   (   0.02,-137.20) (  -0.29,-135.71)  168.89                80
 08/07/2020   22:54:05   (  -0.02,-137.19) (  -0.86,-140.94)  427.78                80
 08/08/2020   22:37:48   (  -0.02,-137.18) (   0.16,-136.36)   93.90                80
 08/10/2020   10:56:39   (   0.02,-137.18) (   1.01,-141.55)  498.33                80
 08/11/2020   10:37:42   (   0.02,-137.17) (  -0.00,-136.97)   22.95                80
 08/13/2020   22:40:24   (  -0.00,-137.14) (  -0.12,-137.62)   54.91                80
 08/14/2020   22:24:09   (   0.01,-137.12) (   0.95,-133.05)  465.40                80