Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/15/2020   22:50:07   (  -0.04,-137.21) (  -0.77,-140.40)  364.20                80
 02/16/2020   22:33:51   (  -0.04,-137.21) (   0.26,-135.83)  156.88                80
 02/18/2020   10:55:21   (   0.04,-137.19) (   0.90,-141.03)  437.06                80
 02/19/2020   10:33:46   (   0.05,-137.18) (  -0.14,-136.45)   83.58                80
 02/21/2020   22:39:10   (  -0.05,-137.16) (  -0.03,-137.11)    6.41                80
 02/24/2020   10:41:45   (   0.06,-137.12) (   0.16,-137.73)   68.19                80
 02/25/2020   10:20:08   (   0.05,-137.11) (  -0.82,-133.14)  451.96                80
 02/26/2020   22:41:48   (  -0.06,-137.09) (  -0.32,-138.38)  146.65                80
 02/27/2020   22:25:32   (  -0.06,-137.07) (   0.66,-133.80)  373.27                80