Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 18.  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) (   0.66,-131.60)  379.09                80
 09/19/2020   10:00:54   (  -0.11,-128.30) (  -0.42,-127.03)  145.39                80
 09/20/2020   22:22:32   (   0.11,-128.29) (  -0.75,-132.26)  451.43                80
 09/21/2020   22:00:56   (   0.11,-128.31) (   0.27,-127.68)   72.38                80
 09/24/2020   10:06:08   (  -0.12,-128.38) (  -0.12,-128.28)   11.06                80
 09/26/2020   22:08:51   (   0.13,-128.38) (   0.03,-128.94)   63.54                80
 09/27/2020   21:47:15   (   0.13,-128.39) (   1.05,-124.36)  459.75                80
 09/29/2020   10:08:44   (  -0.13,-128.44) (   0.12,-129.55)  125.90                80
 09/30/2020   09:52:28   (  -0.13,-128.45) (  -0.91,-124.96)  397.54                80
 10/01/2020   22:14:06   (   0.13,-128.44) (  -0.27,-130.19)  200.01                80