Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2019   22:00:43   (   0.19,-127.82) (   0.12,-128.21)   44.00                80
 07/17/2019   21:44:27   (   0.18,-127.86) (   1.11,-123.63)  481.06                80
 07/19/2019   10:03:20   (  -0.20,-127.94) (  -0.00,-128.86)  104.04                80
 07/20/2019   09:47:05   (  -0.19,-127.97) (  -0.99,-124.28)  420.64                80
 07/21/2019   22:06:06   (   0.21,-127.99) (  -0.11,-129.53)  175.93                80
 07/22/2019   21:49:51   (   0.20,-128.02) (   0.89,-124.96)  348.82                80
 07/24/2019   10:08:44   (  -0.23,-128.10) (   0.23,-130.18)  236.54                80
 07/25/2019   09:52:29   (  -0.22,-128.13) (  -0.77,-125.60)  287.60                80
 07/26/2019   22:11:29   (   0.24,-128.12) (  -0.38,-130.84)  310.34                80
 07/27/2019   21:55:14   (   0.23,-128.15) (   0.67,-126.28)  213.50                80