Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/07/2020   10:50:41   (   0.03,-137.22) (   0.66,-139.95)  311.87                80
 01/08/2020   10:29:05   (   0.03,-137.21) (  -0.37,-135.38)  208.94                80
 01/09/2020   22:53:24   (  -0.04,-137.19) (  -0.81,-140.61)  389.35                80
 01/10/2020   22:31:49   (  -0.03,-137.18) (   0.22,-136.03)  130.95                80
 01/12/2020   10:56:00   (   0.04,-137.17) (   0.92,-141.24)  463.20                80
 01/13/2020   10:34:24   (   0.04,-137.15) (  -0.05,-136.65)   56.67                80
 01/15/2020   22:39:48   (  -0.04,-137.11) (  -0.10,-137.31)   23.42                80
 01/16/2020   22:18:12   (  -0.04,-137.09) (   0.93,-132.73)  496.18                80
 01/18/2020   10:42:22   (   0.04,-137.07) (   0.26,-137.93)   98.86                80
 01/19/2020   10:20:47   (   0.04,-137.04) (  -0.77,-133.35)  420.30                80