Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/18/2020   10:17:09   (  -0.11,-128.28) (   0.65,-131.60)  379.19                80
 09/19/2020   10:00:53   (  -0.11,-128.30) (  -0.37,-127.02)  145.27                80
 09/20/2020   22:22:31   (   0.11,-128.29) (  -0.80,-132.25)  451.50                80
 09/21/2020   22:00:56   (   0.11,-128.31) (   0.28,-127.68)   72.33                80
 09/24/2020   10:06:09   (  -0.12,-128.38) (  -0.13,-128.29)   10.67                80
 09/26/2020   22:08:50   (   0.13,-128.37) (  -0.01,-128.93)   63.63                80
 09/27/2020   21:47:14   (   0.13,-128.39) (   1.01,-124.35)  459.59                80
 09/29/2020   10:08:44   (  -0.13,-128.44) (   0.09,-129.55)  126.17                80
 09/30/2020   09:52:28   (  -0.13,-128.45) (  -0.93,-124.97)  397.29                80