Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 12 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/26/2020   10:43:54   (  -0.02,-137.20) (  -0.01,-137.29)    9.43                80
 12/28/2020   22:43:53   (   0.00,-137.17) (  -0.19,-137.91)   85.11                80
 12/29/2020   22:27:37   (  -0.00,-137.15) (   0.86,-133.33)  436.04                80
 12/31/2020   10:46:26   (   0.01,-137.13) (   0.29,-138.52)  157.06                80
 01/01/2021   10:30:08   (   0.01,-137.11) (  -0.70,-133.92)  363.48                80
 01/02/2021   22:49:05   (  -0.01,-137.07) (  -0.49,-139.13)  235.45                80
 01/03/2021   22:32:48   (  -0.01,-137.05) (   0.56,-134.56)  284.77                80
 01/05/2021   10:51:38   (   0.01,-137.02) (   0.59,-139.74)  309.36                80
 01/06/2021   10:35:20   (   0.01,-137.00) (  -0.41,-135.15)  210.48                80