Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 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)
 05/07/2019   09:47:17   (   0.06,-128.23) (  -0.85,-124.21)  458.57                80
 05/08/2019   22:06:18   (  -0.05,-128.26) (  -0.31,-129.46)  136.09                80
 05/09/2019   21:50:04   (  -0.06,-128.28) (   0.72,-124.89)  386.77                80
 05/11/2019   10:08:56   (   0.05,-128.30) (   0.44,-130.10)  204.84                80
 05/12/2019   09:52:41   (   0.06,-128.31) (  -0.54,-125.52)  317.65                80
 05/13/2019   22:11:42   (  -0.05,-128.33) (  -0.62,-130.77)  278.22                80
 05/14/2019   21:55:27   (  -0.05,-128.35) (   0.42,-126.20)  244.29                80
 05/16/2019   10:14:20   (   0.04,-128.37) (   0.74,-131.41)  347.51                80
 05/17/2019   09:58:05   (   0.05,-128.38) (  -0.30,-126.84)  174.58                80
 05/18/2019   22:17:07   (  -0.03,-128.39) (  -0.86,-132.09)  422.40                80
 05/19/2019   22:00:52   (  -0.04,-128.40) (   0.17,-127.53)   99.57                80