Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 2 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)
 02/12/2020   22:06:31   (   0.36,-128.34) (   0.05,-129.64)  148.83                80
 02/13/2020   21:50:15   (   0.36,-128.37) (   1.09,-125.06)  376.49                80
 02/15/2020   10:09:06   (  -0.37,-128.41) (   0.06,-130.26)  211.79                80
 02/16/2020   09:52:50   (  -0.36,-128.43) (  -0.97,-125.69)  313.08                80
 02/17/2020   22:11:51   (   0.37,-128.48) (  -0.17,-130.93)  278.63                80
 02/18/2020   21:55:35   (   0.36,-128.51) (   0.86,-126.35)  246.09                80
 02/20/2020   10:17:05   (  -0.36,-128.54) (   0.30,-131.55)  342.69                80
 02/21/2020   09:58:10   (  -0.36,-128.56) (  -0.74,-126.98)  181.70                80
 02/22/2020   22:17:09   (   0.36,-128.60) (  -0.45,-132.21)  410.67                80
 02/23/2020   22:00:54   (   0.36,-128.63) (   0.59,-127.63)  113.71                80
 02/25/2020   10:22:24   (  -0.36,-128.66) (   0.58,-132.83)  475.08                80