Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/20/2020   10:57:13   (   0.01,-137.19) (   0.86,-141.11)  446.24                80
 07/21/2020   10:35:36   (   0.01,-137.19) (  -0.16,-136.53)   75.83                80
 07/23/2020   22:38:18   (  -0.01,-137.18) (  -0.00,-137.17)    1.82                80
 07/26/2020   10:43:32   (   0.02,-137.17) (   0.14,-137.79)   69.59                80
 07/27/2020   10:21:55   (   0.02,-137.16) (  -0.87,-133.20)  451.65                80
 07/28/2020   22:43:34   (  -0.02,-137.15) (  -0.28,-138.43)  145.62                80
 07/29/2020   22:27:17   (  -0.02,-137.14) (   0.73,-133.85)  375.25                80
 07/31/2020   10:46:06   (   0.03,-137.12) (   0.49,-139.03)  218.66                80
 08/01/2020   10:29:51   (   0.03,-137.10) (  -0.59,-134.46)  301.84                80
 08/02/2020   22:48:48   (  -0.04,-137.07) (  -0.62,-139.68)  296.43                80