Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 15.  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,-137.20) (   0.08,-137.66)   51.45                80
 10/16/2019   10:19:24   (  -0.00,-137.20) (  -0.92,-133.08)  469.33                80
 10/17/2019   22:41:04   (  -0.00,-137.19) (  -0.26,-138.32)  129.09                80
 10/18/2019   22:24:48   (  -0.00,-137.18) (   0.75,-133.74)  391.17                80
 10/20/2019   10:46:20   (   0.00,-137.16) (   0.41,-138.95)  203.79                80
 10/21/2019   10:27:24   (   0.00,-137.15) (  -0.60,-134.37)  315.86                80
 10/22/2019   22:46:25   (  -0.00,-137.12) (  -0.58,-139.61)  284.28                80
 10/23/2019   22:30:09   (  -0.00,-137.10) (   0.43,-135.03)  235.12                80
 10/25/2019   10:49:00   (  -0.00,-137.08) (   0.72,-140.24)  360.89                80
 10/26/2019   10:32:45   (   0.00,-137.06) (  -0.28,-135.66)  158.25                80
 10/27/2019   22:51:45   (  -0.00,-137.02) (  -0.88,-140.90)  442.60                80
 10/28/2019   22:35:30   (  -0.01,-137.00) (   0.13,-136.33)   76.33                80