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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/17/2019   10:48:19   (   0.01,-137.22) (   0.49,-139.41)  249.10                80
 12/18/2019   10:26:43   (   0.00,-137.22) (  -0.54,-134.83)  272.08                80
 12/19/2019   22:51:03   (  -0.01,-137.21) (  -0.63,-140.07)  324.85                80
 12/20/2019   22:29:27   (  -0.00,-137.21) (   0.40,-135.49)  196.24                80
 12/22/2019   10:53:39   (   0.01,-137.21) (   0.78,-140.69)  397.07                80
 12/23/2019   10:32:03   (   0.01,-137.20) (  -0.24,-136.12)  123.57                80
 12/24/2019   22:56:21   (  -0.02,-137.18) (  -0.98,-141.34)  474.52                80
 12/25/2019   22:34:46   (  -0.02,-137.17) (   0.05,-136.77)   45.88                80
 12/28/2019   10:40:03   (   0.02,-137.15) (   0.04,-137.40)   28.84                80
 12/29/2019   10:18:27   (   0.01,-137.13) (  -0.98,-132.83)  491.12                80
 12/30/2019   22:42:46   (  -0.02,-137.11) (  -0.24,-138.05)  108.03                80