Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 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)
 09/16/2019   09:46:36   (   0.35,-128.08) (  -0.37,-124.78)  375.21                80
 09/17/2019   22:08:16   (  -0.34,-128.01) (  -0.81,-130.02)  229.57                80
 09/18/2019   21:52:02   (  -0.34,-127.99) (   0.25,-125.46)  288.72                80
 09/20/2019   10:13:33   (   0.33,-127.97) (   0.93,-130.66)  306.97                80
 09/21/2019   09:51:58   (   0.34,-127.93) (  -0.07,-126.08)  210.34                80
 09/22/2019   22:13:38   (  -0.32,-127.84) (  -1.11,-131.32)  396.97                80
 09/23/2019   21:57:22   (  -0.32,-127.81) (  -0.11,-126.74)  120.30                80
 09/25/2019   10:16:15   (   0.30,-127.78) (   1.22,-131.96)  476.07                80
 09/26/2019   09:59:59   (   0.31,-127.74) (   0.22,-127.38)   40.56                80
 09/28/2019   22:00:04   (  -0.30,-127.60) (  -0.41,-128.05)   51.34                80