Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/18/2020   22:33:02   (  -0.03,-137.19) (   0.28,-135.92)  146.35                80
 07/20/2020   10:57:11   (   0.03,-137.19) (   0.93,-141.10)  445.83                80
 07/21/2020   10:35:36   (   0.03,-137.19) (  -0.14,-136.53)   75.72                80
 07/23/2020   22:40:58   (  -0.03,-137.17) (  -0.01,-137.17)    1.82                80
 07/26/2020   10:40:52   (   0.03,-137.15) (   0.16,-137.78)   72.19                80
 07/27/2020   10:24:35   (   0.03,-137.14) (  -0.86,-133.20)  448.58                80
 07/28/2020   22:43:33   (  -0.03,-137.11) (  -0.30,-138.43)  149.50                80
 07/29/2020   22:27:17   (  -0.02,-137.10) (   0.72,-133.85)  370.75                80
 07/31/2020   10:46:07   (  -0.02,-137.07) (   0.45,-139.04)  225.01                80