Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 5 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/02/2021   10:32:52   (  -0.02,-137.19) (  -0.62,-134.52)  303.54                80
 05/03/2021   22:54:29   (   0.02,-137.18) (  -0.53,-139.74)  290.57                80
 05/04/2021   22:38:11   (   0.02,-137.18) (   0.50,-135.15)  231.83                80
 05/06/2021   10:59:39   (  -0.01,-137.16) (   0.72,-140.32)  359.86                80
 05/07/2021   10:38:01   (  -0.01,-137.16) (  -0.31,-135.73)  162.26                80
 05/08/2021   22:59:37   (   0.01,-137.15) (  -0.84,-140.94)  432.55                80
 05/09/2021   22:43:20   (   0.01,-137.14) (   0.19,-136.35)   89.37                80
 05/12/2021   10:43:11   (  -0.01,-137.10) (  -0.07,-136.95)   18.45                80
 05/14/2021   22:45:49   (   0.01,-137.06) (  -0.11,-137.56)   57.16                80
 05/15/2021   22:29:31   (   0.01,-137.04) (   0.92,-132.97)  463.65                80