Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 5 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/03/2021   10:15:59   (   0.05,-127.76) (   0.43,-129.47)  194.38                80
 05/04/2021   09:54:22   (   0.05,-127.80) (  -0.60,-124.88)  332.32                80
 05/05/2021   22:15:58   (  -0.05,-127.81) (  -0.56,-130.09)  260.33                80
 05/06/2021   21:59:41   (  -0.05,-127.85) (   0.48,-125.51)  267.09                80
 05/08/2021   10:21:09   (   0.06,-127.96) (   0.68,-130.69)  310.56                80
 05/09/2021   09:59:32   (   0.05,-128.00) (  -0.35,-126.10)  215.96                80
 05/10/2021   22:21:08   (  -0.05,-127.99) (  -0.80,-131.31)  378.39                80
 05/11/2021   22:04:50   (  -0.05,-128.03) (   0.23,-126.72)  148.44                80
 05/13/2021   10:26:20   (   0.05,-128.15) (   0.87,-131.92)  429.33                80
 05/14/2021   10:04:42   (   0.04,-128.17) (  -0.17,-127.33)   96.44                80
 05/16/2021   22:10:00   (  -0.04,-128.18) (  -0.01,-127.94)   26.01                80