Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/16/2020   10:44:02   (   0.02,-137.21) (   0.26,-138.25)  118.40                80
 03/17/2020   10:22:27   (   0.02,-137.20) (  -0.78,-133.67)  402.78                80
 03/18/2020   22:44:06   (  -0.02,-137.20) (  -0.38,-138.91)  194.22                80
 03/19/2020   22:27:50   (  -0.02,-137.19) (   0.61,-134.32)  326.94                80
 03/21/2020   10:49:21   (   0.01,-137.18) (   0.53,-139.52)  266.48                80
 03/22/2020   10:27:45   (   0.01,-137.18) (  -0.52,-134.95)  254.25                80
 03/23/2020   22:49:24   (  -0.01,-137.16) (  -0.69,-140.17)  343.62                80
 03/24/2020   22:33:08   (  -0.00,-137.15) (   0.36,-135.60)  177.13                80
 03/26/2020   10:54:39   (   0.00,-137.14) (   0.84,-140.79)  416.69                80
 03/27/2020   10:33:03   (   0.00,-137.12) (  -0.20,-136.22)  103.40                80
 03/28/2020   22:54:41   (   0.00,-137.09) (  -0.99,-141.44)  495.96                80
 03/29/2020   22:38:26   (   0.01,-137.08) (   0.06,-136.87)   23.75                80