Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/15/2019   10:40:59   (  -0.00,-137.21) (   0.11,-137.65)   51.07                80
 10/16/2019   10:19:23   (  -0.00,-137.20) (  -0.90,-133.08)  469.80                80
 10/17/2019   22:41:04   (   0.00,-137.19) (  -0.22,-138.33)  128.96                80
 10/18/2019   22:24:49   (   0.00,-137.18) (   0.79,-133.75)  391.34                80
 10/20/2019   10:43:40   (  -0.01,-137.17) (   0.37,-138.96)  203.37                80
 10/21/2019   10:27:25   (  -0.02,-137.15) (  -0.64,-134.38)  316.24                80
 10/22/2019   22:46:25   (   0.02,-137.13) (  -0.53,-139.62)  284.14                80
 10/23/2019   22:30:10   (   0.02,-137.11) (   0.48,-135.04)  235.29                80
 10/25/2019   10:49:01   (  -0.03,-137.09) (   0.68,-140.25)  360.23                80
 10/26/2019   10:32:45   (  -0.03,-137.07) (  -0.33,-135.67)  158.96                80