Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/21/2019   10:19:44   (   0.02,-128.43) (   0.97,-132.73)  490.50                80
 05/22/2019   10:00:49   (   0.03,-128.43) (  -0.01,-128.15)   31.06                80
 05/24/2019   22:03:35   (  -0.03,-128.44) (  -0.12,-128.83)   44.42                80
 05/25/2019   21:47:21   (  -0.04,-128.45) (   0.91,-124.27)  477.19                80
 05/27/2019   10:06:12   (   0.03,-128.45) (   0.28,-129.47)  116.70                80
 05/28/2019   09:49:58   (   0.03,-128.45) (  -0.76,-124.90)  404.45                80
 05/29/2019   22:08:59   (  -0.02,-128.45) (  -0.41,-130.15)  193.68                80
 05/30/2019   21:52:45   (  -0.02,-128.45) (   0.63,-125.58)  327.42                80
 06/01/2019   10:11:37   (   0.00,-128.45) (   0.51,-130.79)  266.95                80
 06/02/2019   09:55:21   (   0.01,-128.44) (  -0.47,-126.21)  253.39                80
 06/03/2019   22:14:23   (   0.01,-128.42) (  -0.69,-131.46)  346.77                80