Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/06/2019   22:03:21   (   0.28,-128.34) (   0.16,-128.90)   63.85                80
 08/07/2019   21:47:05   (   0.28,-128.36) (   1.15,-124.32)  459.08                80
 08/09/2019   10:05:59   (  -0.30,-128.41) (  -0.03,-129.54)  129.88                80
 08/10/2019   09:49:44   (  -0.29,-128.42) (  -1.08,-124.98)  392.55                80
 08/11/2019   22:08:45   (   0.31,-128.41) (  -0.06,-130.22)  206.56                80
 08/12/2019   21:52:29   (   0.31,-128.42) (   0.93,-125.64)  315.81                80
 08/14/2019   10:11:22   (  -0.33,-128.46) (   0.19,-130.86)  273.52                80
 08/15/2019   09:55:07   (  -0.32,-128.47) (  -0.80,-126.29)  248.57                80
 08/16/2019   22:14:07   (   0.34,-128.45) (  -0.35,-131.53)  351.14                80
 08/17/2019   21:57:52   (   0.33,-128.46) (   0.64,-126.95)  170.96                80