Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 10 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)
 10/06/2020   22:19:20   (   0.13,-128.42) (  -0.57,-131.42)  342.47                80
 10/07/2020   21:57:43   (   0.13,-128.42) (   0.46,-126.84)  179.23                80
 10/09/2020   10:19:13   (  -0.13,-128.43) (   0.68,-132.04)  410.59                80
 10/10/2020   10:02:56   (  -0.14,-128.43) (  -0.35,-127.45)  110.83                80
 10/11/2020   22:24:35   (   0.13,-128.40) (  -0.84,-132.68)  488.15                80
 10/12/2020   22:02:58   (   0.14,-128.39) (   0.19,-128.10)   32.80                80
 10/15/2020   10:05:31   (  -0.14,-128.38) (  -0.08,-128.71)   37.26                80
 10/16/2020   09:49:14   (  -0.14,-128.37) (  -1.11,-124.13)  483.60                80
 10/17/2020   22:10:53   (   0.13,-128.33) (  -0.07,-129.35)  116.02                80
 10/18/2020   21:49:16   (   0.14,-128.31) (   0.96,-124.77)  404.24                80