Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 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)
 06/25/2020   10:28:12   (   0.01,-137.20) (  -0.53,-134.82)  271.47                80
 06/26/2020   22:52:30   (  -0.02,-137.18) (  -0.68,-140.04)  325.57                80
 06/27/2020   22:30:55   (  -0.02,-137.18) (   0.38,-135.46)  195.82                80
 06/29/2020   10:55:04   (   0.02,-137.17) (   0.80,-140.65)  396.48                80
 06/30/2020   10:33:27   (   0.01,-137.16) (  -0.21,-136.07)  124.41                80
 07/01/2020   22:57:47   (  -0.00,-137.14) (  -0.94,-141.30)  474.10                80
 07/02/2020   22:36:11   (   0.00,-137.13) (   0.12,-136.73)   46.35                80
 07/05/2020   10:38:44   (  -0.01,-137.10) (   0.06,-137.33)   27.48                80
 07/06/2020   10:22:29   (  -0.01,-137.08) (  -1.00,-132.76)  492.70                80
 07/07/2020   22:41:27   (   0.01,-137.05) (  -0.19,-137.98)  106.58                80
 07/08/2020   22:25:10   (   0.01,-137.03) (   0.82,-133.40)  413.44                80