Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/27/2020   21:47:14   (   0.13,-128.37) (   1.03,-124.35)  458.84                80
 09/29/2020   10:08:43   (  -0.13,-128.43) (   0.13,-129.54)  126.68                80
 09/30/2020   09:52:27   (  -0.13,-128.44) (  -0.90,-124.96)  396.48                80
 10/01/2020   22:14:05   (   0.13,-128.41) (  -0.28,-130.18)  202.00                80
 10/02/2020   21:52:29   (   0.13,-128.42) (   0.75,-125.60)  320.75                80
 10/04/2020   10:13:58   (  -0.13,-128.46) (   0.40,-130.79)  265.64                80
 10/05/2020   09:57:42   (  -0.13,-128.47) (  -0.62,-126.21)  256.98                80
 10/06/2020   22:19:20   (   0.13,-128.43) (  -0.56,-131.43)  342.22                80
 10/07/2020   21:57:44   (   0.14,-128.43) (   0.47,-126.85)  179.62                80
 10/09/2020   10:19:13   (  -0.13,-128.46) (   0.67,-132.04)  408.54                80
 10/10/2020   10:02:56   (  -0.14,-128.45) (  -0.35,-127.46)  113.09                80