Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 12 25.  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,-137.21) (  -0.02,-137.29)    9.01                80
 12/28/2020   22:43:53   (   0.00,-137.18) (  -0.19,-137.91)   84.16                80
 12/29/2020   22:27:37   (  -0.00,-137.16) (   0.87,-133.33)  437.16                80
 12/31/2020   10:46:26   (   0.01,-137.14) (   0.29,-138.52)  155.80                80
 01/01/2021   10:30:08   (   0.01,-137.13) (  -0.71,-133.93)  364.91                80
 01/02/2021   22:49:05   (  -0.01,-137.09) (  -0.49,-139.13)  233.70                80
 01/03/2021   22:32:48   (  -0.01,-137.07) (   0.57,-134.56)  286.67                80
 01/05/2021   10:51:37   (   0.01,-137.04) (   0.64,-139.73)  307.31                80
 01/06/2021   10:35:20   (   0.01,-137.02) (  -0.42,-135.15)  212.69                80
 01/07/2021   22:54:16   (  -0.01,-136.97) (  -0.78,-140.36)  387.08                80