Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/02/2021   10:22:43   (   0.40,-127.47) (   1.33,-131.58)  468.33                80
 02/03/2021   10:01:07   (   0.38,-127.43) (   0.27,-127.00)   49.70                80
 02/05/2021   22:06:26   (  -0.41,-127.38) (  -0.44,-127.62)   27.10                80
 02/06/2021   21:44:49   (  -0.39,-127.34) (   0.56,-123.03)  490.59                80
 02/08/2021   10:08:56   (   0.43,-127.21) (   0.65,-128.20)  112.92                80
 02/09/2021   09:47:19   (   0.41,-127.17) (  -0.36,-123.61)  404.34                80
 02/10/2021   22:11:36   (  -0.44,-127.15) (  -0.82,-128.83)  191.39                80
 02/11/2021   21:49:59   (  -0.43,-127.11) (   0.18,-124.24)  326.06                80
 02/13/2021   10:14:06   (   0.46,-126.98) (   1.02,-129.41)  277.51                80
 02/14/2021   09:52:29   (   0.44,-126.93) (  -0.04,-124.83)  239.69                80