Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 2 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/13/2020   21:50:16   (   0.36,-128.37) (   1.11,-125.07)  376.60                80
 02/15/2020   10:09:06   (  -0.37,-128.40) (   0.04,-130.26)  211.96                80
 02/16/2020   09:52:51   (  -0.36,-128.43) (  -0.99,-125.69)  312.89                80
 02/17/2020   22:11:51   (   0.37,-128.48) (  -0.15,-130.93)  278.57                80
 02/18/2020   21:55:34   (   0.36,-128.51) (   0.83,-126.34)  246.15                80
 02/20/2020   10:14:25   (  -0.36,-128.54) (   0.33,-131.54)  342.92                80
 02/21/2020   09:58:09   (  -0.36,-128.56) (  -0.70,-126.97)  181.45                80
 02/22/2020   22:17:10   (   0.36,-128.60) (  -0.44,-132.21)  410.64                80
 02/23/2020   22:00:54   (   0.36,-128.63) (   0.60,-127.64)  113.77                80
 02/25/2020   10:22:24   (  -0.36,-128.66) (   0.56,-132.83)  475.34                80
 02/26/2020   10:00:49   (  -0.36,-128.68) (  -0.47,-128.26)   48.71                80