Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 6.  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   22:03:20   (   0.28,-128.34) (   0.14,-128.90)   63.90                80
 08/07/2019   21:47:06   (   0.28,-128.36) (   1.19,-124.33)  459.04                80
 08/09/2019   10:05:58   (  -0.30,-128.41) (  -0.02,-129.54)  129.85                80
 08/10/2019   09:49:44   (  -0.29,-128.42) (  -1.07,-124.97)  392.55                80
 08/11/2019   22:08:44   (   0.31,-128.40) (  -0.08,-130.22)  206.76                80
 08/12/2019   21:52:29   (   0.31,-128.41) (   0.92,-125.64)  315.56                80
 08/14/2019   10:11:22   (  -0.33,-128.46) (   0.20,-130.86)  273.62                80
 08/15/2019   09:55:06   (  -0.32,-128.47) (  -0.80,-126.28)  248.42                80
 08/16/2019   22:14:07   (   0.34,-128.44) (  -0.35,-131.53)  351.53                80
 08/17/2019   21:57:51   (   0.33,-128.45) (   0.65,-126.95)  170.54                80
 08/19/2019   10:16:45   (  -0.35,-128.49) (   0.46,-132.17)  418.74                80