Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 6 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/04/2021   22:50:06   (  -0.01,-137.19) (  -0.14,-137.81)   70.35                80
 06/05/2021   22:28:28   (  -0.00,-137.18) (   0.90,-133.22)  452.21                80
 06/07/2021   10:52:35   (   0.01,-137.17) (   0.25,-138.40)  138.58                80
 06/08/2021   10:30:57   (  -0.00,-137.17) (  -0.73,-133.80)  383.47                80
 06/09/2021   22:52:34   (   0.00,-137.15) (  -0.40,-139.02)  212.45                80
 06/10/2021   22:36:16   (   0.01,-137.14) (   0.59,-134.42)  309.19                80
 06/12/2021   10:57:43   (  -0.01,-137.12) (   0.56,-139.60)  283.01                80
 06/13/2021   10:36:06   (  -0.01,-137.10) (  -0.48,-135.01)  238.12                80
 06/14/2021   22:57:42   (   0.01,-137.07) (  -0.70,-140.22)  359.22                80
 06/15/2021   22:41:24   (   0.01,-137.05) (   0.34,-135.63)  161.72                80
 06/17/2021   11:02:51   (  -0.00,-137.02) (   0.87,-140.80)  431.34                80