Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/22/2020   22:25:38   (  -0.00,-137.19) (   0.67,-134.21)  340.27                80
 06/24/2020   10:49:48   (   0.00,-137.18) (   0.51,-139.39)  252.26                80
 06/25/2020   10:28:11   (   0.00,-137.17) (  -0.50,-134.81)  268.82                80
 06/26/2020   22:52:31   (  -0.01,-137.16) (  -0.65,-140.04)  328.78                80
 06/27/2020   22:30:54   (  -0.01,-137.15) (   0.36,-135.46)  192.04                80
 06/29/2020   10:55:03   (   0.01,-137.13) (   0.83,-140.65)  401.49                80
 06/30/2020   10:33:28   (   0.01,-137.12) (  -0.24,-136.08)  118.79                80
 07/01/2020   22:57:46   (   0.00,-137.09) (  -0.96,-141.30)  480.28                80
 07/02/2020   22:38:51   (   0.01,-137.07) (   0.10,-136.73)   39.62                80
 07/05/2020   10:38:44   (  -0.01,-137.02) (   0.08,-137.33)   35.76                80