Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2022 4 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2022   23:01:11   (   0.03,-137.17) (  -0.20,-138.13)  110.04                80
 04/16/2022   22:40:07   (   0.03,-137.16) (   0.81,-133.68)  396.30                80
 04/18/2022   11:05:07   (  -0.03,-137.14) (   0.39,-139.06)  218.76                80
 04/19/2022   10:44:03   (  -0.03,-137.12) (  -0.61,-134.61)  286.89                80
 04/20/2022   23:09:11   (   0.02,-137.09) (  -0.65,-140.02)  334.79                80
 04/21/2022   22:50:48   (   0.02,-137.07) (   0.36,-135.57)  170.39                80
 04/23/2022   11:13:07   (  -0.02,-137.03) (   0.85,-140.95)  446.17                80
 04/24/2022   10:52:04   (  -0.02,-137.01) (  -0.16,-136.50)   58.82                80
 04/26/2022   22:56:09   (   0.01,-136.94) (  -0.09,-137.46)   58.78                80