Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 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)
 02/03/2021   10:01:06   (   0.39,-127.43) (   0.31,-126.99)   49.64                80
 02/05/2021   22:06:27   (  -0.41,-127.39) (  -0.43,-127.63)   26.65                80
 02/06/2021   21:44:49   (  -0.39,-127.35) (   0.58,-123.04)  491.25                80
 02/08/2021   10:08:57   (   0.43,-127.21) (   0.63,-128.21)  112.67                80
 02/09/2021   09:47:19   (   0.41,-127.17) (  -0.38,-123.62)  404.67                80
 02/10/2021   22:11:36   (  -0.44,-127.16) (  -0.81,-128.83)  190.45                80
 02/11/2021   21:49:59   (  -0.43,-127.11) (   0.20,-124.24)  327.06                80
 02/13/2021   10:14:06   (   0.46,-126.98) (   1.01,-129.41)  276.90                80
 02/14/2021   09:52:30   (   0.44,-126.94) (  -0.06,-124.83)  240.38                80
 02/15/2021   22:16:46   (  -0.47,-126.92) (  -1.18,-130.04)  355.34                80
 02/16/2021   21:55:10   (  -0.45,-126.88) (  -0.12,-125.46)  162.04                80