Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/01/2021   10:23:00   (  -0.04,-128.32) (   0.66,-131.40)  351.65                80
 04/02/2021   10:01:23   (  -0.05,-128.30) (  -0.36,-126.81)  168.95                80
 04/03/2021   22:22:59   (   0.03,-128.28) (  -0.81,-132.02)  426.42                80
 04/04/2021   22:06:41   (   0.04,-128.27) (   0.21,-127.43)   94.74                80
 04/06/2021   10:28:10   (  -0.02,-128.24) (   0.96,-132.61)  498.74                80
 04/07/2021   10:06:32   (  -0.03,-128.21) (  -0.06,-128.02)   21.59                80
 04/09/2021   22:09:11   (   0.02,-128.17) (  -0.08,-128.65)   54.13                80
 04/10/2021   21:52:54   (   0.03,-128.16) (   0.94,-124.06)  466.87                80
 04/12/2021   10:14:22   (  -0.02,-128.13) (   0.24,-129.24)  126.57                80
 04/13/2021   09:52:44   (  -0.03,-128.10) (  -0.78,-124.65)  393.34                80