Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 11 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/21/2019   10:40:34   (  -0.01,-137.18) (   0.07,-137.55)   42.03                80
 11/22/2019   10:18:59   (  -0.01,-137.18) (  -0.95,-132.98)  478.46                80
 11/23/2019   22:40:38   (   0.00,-137.17) (  -0.23,-138.21)  118.93                80
 11/24/2019   22:24:22   (  -0.01,-137.16) (   0.79,-133.64)  401.60                80
 11/26/2019   10:45:54   (   0.01,-137.14) (   0.40,-138.83)  193.62                80
 11/27/2019   10:24:18   (   0.01,-137.12) (  -0.62,-134.26)  326.14                80
 11/28/2019   22:45:58   (  -0.01,-137.10) (  -0.55,-139.49)  272.75                80
 11/29/2019   22:27:02   (  -0.01,-137.08) (   0.47,-134.92)  246.73                80
 12/01/2019   10:51:13   (   0.01,-137.06) (   0.72,-140.12)  349.59                80
 12/02/2019   10:29:39   (   0.00,-137.04) (  -0.36,-135.55)  169.58                80
 12/03/2019   22:53:57   (  -0.01,-137.01) (  -0.86,-140.78)  430.03                80
 12/04/2019   22:32:22   (  -0.00,-136.99) (   0.16,-136.20)   89.04                80