Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/11/2019   22:08:44   (   0.31,-128.39) (  -0.10,-130.21)  207.34                80
 08/12/2019   21:52:29   (   0.31,-128.40) (   0.95,-125.65)  314.76                80
 08/14/2019   10:11:21   (  -0.33,-128.45) (   0.22,-130.85)  274.67                80
 08/15/2019   09:55:07   (  -0.32,-128.45) (  -0.83,-126.29)  247.13                80
 08/16/2019   22:14:06   (   0.34,-128.42) (  -0.37,-131.52)  353.35                80
 08/17/2019   21:57:52   (   0.33,-128.43) (   0.68,-126.96)  168.51                80
 08/19/2019   10:16:44   (  -0.35,-128.47) (   0.48,-132.16)  420.94                80
 08/20/2019   10:00:29   (  -0.34,-128.47) (  -0.51,-127.59)  100.51                80
 08/22/2019   22:03:13   (   0.35,-128.44) (   0.37,-128.25)   20.23                80