Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/24/2019   22:03:35   (  -0.03,-128.44) (  -0.13,-128.83)   44.30                80
 05/25/2019   21:47:21   (  -0.04,-128.45) (   0.91,-124.26)  477.25                80
 05/27/2019   10:06:12   (   0.03,-128.44) (   0.28,-129.46)  117.05                80
 05/28/2019   09:49:58   (   0.03,-128.44) (  -0.76,-124.90)  404.05                80
 05/29/2019   22:08:59   (  -0.02,-128.45) (  -0.42,-130.14)  193.91                80
 05/30/2019   21:52:45   (  -0.02,-128.45) (   0.62,-125.58)  327.13                80
 06/01/2019   10:11:37   (   0.01,-128.44) (   0.51,-130.79)  267.62                80
 06/02/2019   09:55:21   (   0.01,-128.43) (  -0.47,-126.21)  252.64                80
 06/03/2019   22:14:23   (   0.01,-128.42) (  -0.70,-131.46)  347.35                80
 06/04/2019   21:58:08   (   0.00,-128.41) (   0.34,-126.89)  172.71                80