Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/05/2020   22:26:30   (  -0.02,-137.22) (   0.52,-134.75)  280.88                80
 01/07/2020   10:50:41   (   0.03,-137.22) (   0.63,-139.96)  311.84                80
 01/08/2020   10:29:06   (   0.03,-137.21) (  -0.40,-135.38)  208.97                80
 01/09/2020   22:53:25   (  -0.04,-137.20) (  -0.79,-140.61)  389.32                80
 01/10/2020   22:31:50   (  -0.03,-137.18) (   0.24,-136.04)  130.98                80
 01/12/2020   10:56:00   (   0.04,-137.17) (   0.96,-141.23)  463.20                80
 01/13/2020   10:34:24   (   0.04,-137.15) (  -0.07,-136.66)   56.61                80
 01/15/2020   22:39:48   (  -0.04,-137.11) (  -0.09,-137.31)   23.35                80
 01/16/2020   22:18:13   (  -0.03,-137.09) (   0.94,-132.74)  496.16                80
 01/18/2020   10:42:23   (   0.04,-137.07) (   0.25,-137.93)   98.88                80