Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 10 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)
 10/01/2020   22:14:06   (   0.13,-128.41) (  -0.24,-130.19)  201.92                80
 10/02/2020   21:52:30   (   0.13,-128.41) (   0.79,-125.60)  320.69                80
 10/04/2020   10:13:58   (  -0.13,-128.45) (   0.42,-130.78)  266.71                80
 10/05/2020   09:57:41   (  -0.13,-128.45) (  -0.61,-126.20)  255.72                80
 10/06/2020   22:19:20   (   0.13,-128.42) (  -0.57,-131.42)  343.08                80
 10/07/2020   21:57:44   (   0.13,-128.42) (   0.51,-126.86)  178.63                80
 10/09/2020   10:19:13   (  -0.13,-128.44) (   0.69,-132.04)  410.47                80
 10/10/2020   10:02:56   (  -0.14,-128.43) (  -0.34,-127.45)  110.97                80
 10/11/2020   22:24:34   (   0.13,-128.39) (  -0.84,-132.68)  488.71                80
 10/12/2020   22:02:58   (   0.14,-128.38) (   0.19,-128.10)   32.22                80
 10/15/2020   10:05:31   (  -0.14,-128.38) (  -0.08,-128.71)   37.14                80