Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/16/2020   21:55:40   (   0.11,-128.21) (   0.50,-126.41)  204.59                80
 09/18/2020   10:17:10   (  -0.11,-128.28) (   0.62,-131.61)  379.39                80
 09/19/2020   10:00:53   (  -0.11,-128.30) (  -0.40,-127.03)  145.00                80
 09/20/2020   22:22:32   (   0.11,-128.29) (  -0.76,-132.26)  451.69                80
 09/21/2020   22:00:55   (   0.11,-128.30) (   0.26,-127.67)   72.04                80
 09/24/2020   10:06:08   (  -0.12,-128.38) (  -0.12,-128.28)   10.41                80
 09/26/2020   22:08:50   (   0.13,-128.37) (  -0.02,-128.93)   64.17                80
 09/27/2020   21:47:14   (   0.13,-128.38) (   1.06,-124.36)  459.06                80
 09/29/2020   10:08:44   (  -0.13,-128.43) (   0.10,-129.55)  126.92                80