Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 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)
 03/01/2021   10:10:56   (  -0.16,-128.23) (  -0.03,-128.68)   52.56                80
 03/02/2021   09:49:19   (  -0.16,-128.24) (  -1.10,-124.10)  471.88                80
 03/03/2021   22:10:57   (   0.15,-128.30) (  -0.08,-129.32)  115.84                80
 03/04/2021   21:54:39   (   0.16,-128.32) (   0.93,-124.73)  408.77                80
 03/06/2021   10:16:07   (  -0.14,-128.31) (   0.21,-129.91)  182.22                80
 03/07/2021   09:54:30   (  -0.15,-128.32) (  -0.81,-125.32)  341.37                80
 03/08/2021   22:16:07   (   0.13,-128.36) (  -0.36,-130.54)  248.25                80
 03/09/2021   21:59:50   (   0.13,-128.38) (   0.65,-125.95)  275.88                80
 03/11/2021   10:21:18   (  -0.12,-128.37) (   0.50,-131.13)  314.68                80
 03/12/2021   09:59:41   (  -0.12,-128.38) (  -0.52,-126.55)  208.72                80
 03/13/2021   22:21:18   (   0.11,-128.41) (  -0.64,-131.76)  381.94                80
 03/14/2021   22:05:00   (   0.12,-128.43) (   0.37,-127.17)  142.03                80