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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/05/2021   22:15:58   (  -0.06,-127.80) (  -0.56,-130.09)  260.32                80
 05/06/2021   21:59:41   (  -0.05,-127.85) (   0.47,-125.50)  267.01                80
 05/08/2021   10:21:09   (   0.06,-127.96) (   0.68,-130.68)  310.92                80
 05/09/2021   09:59:31   (   0.05,-127.99) (  -0.36,-126.10)  215.50                80
 05/10/2021   22:21:08   (  -0.06,-127.99) (  -0.79,-131.31)  378.83                80
 05/11/2021   22:04:50   (  -0.05,-128.02) (   0.24,-126.72)  147.91                80
 05/13/2021   10:26:19   (   0.05,-128.13) (   0.90,-131.91)  430.11                80
 05/14/2021   10:04:41   (   0.04,-128.16) (  -0.14,-127.32)   95.56                80
 05/16/2021   22:10:00   (  -0.05,-128.16) (   0.02,-127.95)   25.15                80