Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 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)
 03/06/2021   10:16:07   (  -0.14,-128.31) (   0.20,-129.91)  182.39                80
 03/07/2021   09:54:30   (  -0.14,-128.32) (  -0.81,-125.32)  341.26                80
 03/08/2021   22:16:07   (   0.13,-128.37) (  -0.35,-130.54)  247.30                80
 03/09/2021   21:59:50   (   0.13,-128.38) (   0.66,-125.95)  276.86                80
 03/11/2021   10:21:18   (  -0.12,-128.37) (   0.48,-131.14)  314.54                80
 03/12/2021   09:59:41   (  -0.12,-128.38) (  -0.53,-126.55)  208.90                80
 03/13/2021   22:21:18   (   0.11,-128.42) (  -0.63,-131.76)  380.71                80
 03/14/2021   22:05:00   (   0.12,-128.43) (   0.39,-127.18)  143.30                80
 03/16/2021   10:26:29   (  -0.10,-128.43) (   0.76,-132.36)  447.56                80
 03/17/2021   10:04:51   (  -0.11,-128.43) (  -0.25,-127.77)   75.43                80