Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 9 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/27/2021   10:24:01   (   0.33,-127.67) (   1.09,-130.94)  373.04                80
 09/28/2021   10:07:42   (   0.34,-127.63) (   0.08,-126.34)  146.28                80
 09/29/2021   22:26:39   (  -0.32,-127.54) (  -1.20,-131.56)  457.43                80
 09/30/2021   22:10:20   (  -0.32,-127.50) (  -0.19,-126.97)   61.38                80
 10/03/2021   10:10:08   (   0.31,-127.41) (   0.37,-127.54)   15.08                80
 10/05/2021   22:12:46   (  -0.29,-127.27) (  -0.48,-128.16)  100.42                80
 10/06/2021   21:56:27   (  -0.31,-127.22) (   0.53,-123.56)  417.97                80
 10/08/2021   10:15:14   (   0.28,-127.17) (   0.65,-128.73)  178.03                80
 10/09/2021   09:58:55   (   0.29,-127.12) (  -0.37,-124.13)  340.05                80