Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2019   21:46:40   (  -0.35,-128.12) (   0.56,-124.16)  451.61                80
 09/15/2019   10:08:11   (   0.34,-128.11) (   0.62,-129.36)  142.98                80
 09/16/2019   09:46:36   (   0.35,-128.08) (  -0.38,-124.79)  375.19                80
 09/17/2019   22:08:16   (  -0.34,-128.01) (  -0.80,-130.03)  230.33                80
 09/18/2019   21:52:01   (  -0.34,-127.98) (   0.20,-125.45)  287.92                80
 09/20/2019   10:13:33   (   0.33,-127.97) (   0.91,-130.67)  307.14                80
 09/21/2019   09:51:58   (   0.33,-127.93) (  -0.09,-126.09)  210.17                80
 09/22/2019   22:13:38   (  -0.32,-127.84) (  -1.09,-131.33)  397.84                80
 09/23/2019   21:57:22   (  -0.32,-127.80) (  -0.09,-126.75)  119.35                80
 09/25/2019   10:16:14   (   0.30,-127.78) (   1.25,-131.96)  476.36                80
 09/26/2019   09:57:18   (   0.31,-127.74) (   0.25,-127.38)   40.33                80