Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/19/2019   10:03:20   (  -0.20,-127.94) (   0.03,-128.85)  104.54                80
 07/20/2019   09:47:05   (  -0.19,-127.97) (  -1.02,-124.28)  420.04                80
 07/21/2019   22:06:06   (   0.21,-127.98) (  -0.15,-129.53)  176.32                80
 07/22/2019   21:49:51   (   0.20,-128.01) (   0.90,-124.96)  348.29                80
 07/24/2019   10:08:45   (  -0.23,-128.09) (   0.21,-130.18)  237.65                80
 07/25/2019   09:52:29   (  -0.22,-128.11) (  -0.78,-125.60)  286.36                80
 07/26/2019   22:11:29   (   0.24,-128.11) (  -0.38,-130.85)  311.44                80
 07/27/2019   21:55:15   (   0.23,-128.14) (   0.67,-126.28)  212.26                80
 07/29/2019   10:14:08   (  -0.26,-128.21) (   0.45,-131.50)  374.81                80
 07/30/2019   09:57:53   (  -0.25,-128.22) (  -0.54,-126.92)  148.16                80
 07/31/2019   22:16:53   (   0.28,-128.20) (  -0.61,-132.17)  451.41                80