Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/17/2019   22:39:13   (  -0.00,-137.17) (  -0.00,-137.08)   10.57                80
 05/20/2019   10:41:51   (   0.00,-137.18) (   0.11,-137.73)   61.42                80
 05/21/2019   10:20:16   (   0.00,-137.17) (  -0.87,-133.15)  458.13                80
 05/22/2019   22:41:57   (   0.00,-137.12) (  -0.31,-138.39)  145.05                80
 05/23/2019   22:25:42   (   0.01,-137.11) (   0.73,-133.82)  374.53                80
 05/25/2019   10:47:15   (  -0.01,-137.12) (   0.41,-139.04)  217.91                80
 05/26/2019   10:25:40   (  -0.01,-137.11) (  -0.63,-134.47)  301.09                80
 05/27/2019   22:47:20   (   0.01,-137.05) (  -0.61,-139.70)  303.38                80
 05/28/2019   22:31:06   (   0.02,-137.03) (   0.43,-135.14)  215.72                80
 05/30/2019   10:52:38   (  -0.02,-137.04) (   0.71,-140.35)  377.00                80