Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/10/2020   10:46:40   (   0.03,-137.20) (   0.34,-138.59)  158.36                80
 07/11/2020   10:25:03   (   0.02,-137.20) (  -0.67,-134.00)  363.75                80
 07/12/2020   22:46:43   (  -0.02,-137.20) (  -0.46,-139.24)  232.42                80
 07/13/2020   22:30:26   (  -0.02,-137.20) (   0.55,-134.66)  289.37                80
 07/15/2020   10:51:57   (   0.01,-137.20) (   0.60,-139.85)  302.79                80
 07/16/2020   10:30:20   (   0.00,-137.19) (  -0.41,-135.27)  218.20                80
 07/17/2020   22:51:59   (   0.01,-137.17) (  -0.71,-140.51)  379.82                80
 07/18/2020   22:35:43   (   0.01,-137.16) (   0.30,-135.93)  140.95                80
 07/20/2020   10:57:13   (  -0.01,-137.14) (   0.86,-141.12)  452.62                80
 07/21/2020   10:35:37   (  -0.01,-137.13) (  -0.15,-136.54)   67.66                80