Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 12 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2019   22:56:22   (  -0.02,-137.18) (  -0.95,-141.34)  473.76                80
 12/25/2019   22:34:46   (  -0.02,-137.17) (   0.07,-136.77)   45.62                80
 12/28/2019   10:40:02   (   0.02,-137.12) (   0.07,-137.39)   31.34                80
 12/29/2019   10:18:27   (   0.02,-137.09) (  -0.95,-132.82)  487.67                80
 12/30/2019   22:42:46   (  -0.02,-137.06) (  -0.21,-138.05)  112.59                80
 12/31/2019   22:21:09   (  -0.02,-137.03) (   0.75,-133.46)  406.28                80
 01/02/2020   10:45:21   (   0.02,-137.00) (   0.41,-138.67)  190.42                80
 01/03/2020   10:23:45   (   0.02,-136.97) (  -0.62,-134.09)  328.14                80
 01/04/2020   22:48:05   (  -0.03,-136.93) (  -0.55,-139.32)  272.89                80
 01/05/2020   22:26:29   (  -0.02,-136.90) (   0.48,-134.75)  245.27                80