Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/27/2019   21:55:14   (   0.23,-128.15) (   0.65,-126.27)  214.54                80
 07/29/2019   10:14:08   (  -0.26,-128.21) (   0.47,-131.49)  373.84                80
 07/30/2019   09:57:52   (  -0.25,-128.23) (  -0.52,-126.91)  149.41                80
 07/31/2019   22:16:52   (   0.27,-128.23) (  -0.63,-132.16)  447.98                80
 08/01/2019   22:00:38   (   0.26,-128.25) (   0.43,-127.59)   75.18                80
 08/04/2019   10:03:16   (  -0.27,-128.31) (  -0.30,-128.23)    9.17                80
 08/06/2019   22:03:21   (   0.28,-128.32) (   0.15,-128.90)   66.04                80
 08/07/2019   21:47:06   (   0.28,-128.34) (   1.20,-124.34)  456.66                80
 08/09/2019   10:05:58   (  -0.30,-128.38) (  -0.02,-129.54)  132.96                80
 08/10/2019   09:49:44   (  -0.29,-128.39) (  -1.08,-124.98)  389.23                80