Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 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)
 09/20/2020   22:22:31   (   0.11,-128.29) (  -0.79,-132.25)  451.40                80
 09/21/2020   22:00:55   (   0.11,-128.31) (   0.23,-127.67)   72.46                80
 09/24/2020   10:06:09   (  -0.12,-128.38) (  -0.14,-128.29)   11.18                80
 09/26/2020   22:08:50   (   0.13,-128.38) (  -0.01,-128.93)   63.22                80
 09/27/2020   21:47:14   (   0.13,-128.39) (   1.02,-124.35)  460.03                80
 09/29/2020   10:08:43   (  -0.13,-128.44) (   0.14,-129.54)  125.39                80
 09/30/2020   09:52:28   (  -0.13,-128.46) (  -0.94,-124.97)  398.14                80
 10/01/2020   22:14:05   (   0.13,-128.44) (  -0.29,-130.18)  199.56                80
 10/02/2020   21:52:30   (   0.13,-128.45) (   0.80,-125.61)  323.52                80