Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/20/2019   09:47:05   (  -0.19,-127.97) (  -0.99,-124.28)  419.94                80
 07/21/2019   22:06:06   (   0.21,-127.98) (  -0.12,-129.53)  176.10                80
 07/22/2019   21:49:51   (   0.20,-128.01) (   0.87,-124.95)  348.48                80
 07/24/2019   10:08:44   (  -0.22,-128.09) (   0.24,-130.17)  237.84                80
 07/25/2019   09:52:29   (  -0.21,-128.11) (  -0.75,-125.59)  286.13                80
 07/26/2019   22:11:30   (   0.24,-128.11) (  -0.35,-130.85)  311.38                80
 07/27/2019   21:55:14   (   0.23,-128.14) (   0.64,-126.27)  212.29                80
 07/29/2019   10:14:08   (  -0.26,-128.20) (   0.48,-131.49)  375.15                80
 07/30/2019   09:57:52   (  -0.25,-128.22) (  -0.51,-126.91)  147.81                80
 07/31/2019   22:16:52   (   0.27,-128.20) (  -0.64,-132.16)  451.50                80
 08/01/2019   22:00:38   (   0.27,-128.22) (   0.41,-127.59)   71.36                80