Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 10 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/07/2019   09:51:48   (   0.27,-127.82) (  -0.28,-125.41)  275.19                80
 10/08/2019   22:10:49   (  -0.25,-127.82) (  -0.85,-130.66)  323.63                80
 10/09/2019   21:54:34   (  -0.26,-127.85) (   0.15,-126.09)  201.74                80
 10/11/2019   10:13:25   (   0.23,-127.97) (   1.00,-131.29)  378.95                80
 10/12/2019   09:57:10   (   0.24,-128.01) (  -0.06,-126.73)  146.14                80
 10/13/2019   22:16:11   (  -0.22,-127.99) (  -1.13,-131.97)  453.43                80
 10/14/2019   21:59:55   (  -0.23,-128.02) (  -0.12,-127.39)   71.59                80
 10/17/2019   10:02:32   (   0.22,-128.16) (   0.21,-128.03)   14.65                80
 10/19/2019   22:02:38   (  -0.21,-128.15) (  -0.32,-128.71)   62.68                80
 10/20/2019   21:46:22   (  -0.22,-128.17) (   0.69,-124.13)  461.07                80