Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/13/2021   10:14:19   (  -0.20,-127.78) (   0.21,-129.59)  205.51                80
 02/14/2021   09:52:42   (  -0.20,-127.82) (  -0.80,-125.00)  320.83                80
 02/15/2021   22:14:20   (   0.19,-127.91) (  -0.33,-130.22)  263.50                80
 02/16/2021   21:58:04   (   0.19,-127.95) (   0.74,-125.65)  263.09                80
 02/18/2021   10:19:31   (  -0.19,-127.96) (   0.46,-130.82)  325.92                80
 02/19/2021   09:57:55   (  -0.19,-127.99) (  -0.61,-126.24)  199.84                80
 02/20/2021   22:19:32   (   0.18,-128.07) (  -0.58,-131.46)  386.14                80
 02/21/2021   22:03:14   (   0.18,-128.10) (   0.43,-126.87)  139.70                80
 02/23/2021   10:24:43   (  -0.17,-128.10) (   0.71,-132.05)  449.80                80
 02/24/2021   10:03:05   (  -0.17,-128.12) (  -0.30,-127.46)   75.12                80
 02/26/2021   22:08:26   (   0.16,-128.21) (   0.19,-128.10)   12.53                80