Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 11 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/10/2019   10:48:48   (   0.00,-137.22) (   0.51,-139.55)  265.41                80
 11/11/2019   10:27:13   (  -0.00,-137.22) (  -0.51,-134.97)  255.62                80
 11/12/2019   22:48:52   (   0.00,-137.20) (  -0.69,-140.20)  342.46                80
 11/13/2019   22:32:37   (   0.00,-137.20) (   0.33,-135.63)  178.17                80
 11/15/2019   10:54:09   (  -0.00,-137.19) (   0.79,-140.84)  415.95                80
 11/16/2019   10:32:34   (   0.00,-137.17) (  -0.23,-136.27)  104.08                80
 11/17/2019   22:54:13   (  -0.01,-137.15) (  -0.96,-141.50)  495.71                80
 11/18/2019   22:37:57   (  -0.01,-137.13) (   0.06,-136.93)   24.10                80
 11/21/2019   10:40:33   (   0.01,-137.09) (   0.10,-137.55)   52.23                80
 11/22/2019   10:18:58   (   0.01,-137.07) (  -0.92,-132.98)  466.98                80
 11/23/2019   22:40:36   (  -0.01,-137.03) (  -0.30,-138.20)  133.85                80