Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2020   10:11:54   (  -0.10,-128.17) (   0.41,-130.34)  248.62                80
 09/14/2020   09:55:38   (  -0.10,-128.19) (  -0.67,-125.77)  275.89                80
 09/15/2020   22:17:17   (   0.11,-128.18) (  -0.49,-131.00)  320.71                80
 09/16/2020   21:55:40   (   0.11,-128.20) (   0.53,-126.42)  203.47                80
 09/18/2020   10:17:09   (  -0.11,-128.27) (   0.65,-131.61)  380.95                80
 09/19/2020   10:00:53   (  -0.11,-128.29) (  -0.37,-127.02)  143.18                80
 09/20/2020   22:22:31   (   0.11,-128.27) (  -0.80,-132.25)  453.89                80
 09/21/2020   22:00:55   (   0.11,-128.28) (   0.22,-127.67)   69.62                80
 09/24/2020   10:06:09   (  -0.12,-128.35) (  -0.13,-128.29)    6.99                80