Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 4 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/13/2020   10:13:14   (  -0.20,-127.83) (   0.39,-130.47)  300.34                80
 04/14/2020   09:51:39   (  -0.21,-127.86) (  -0.66,-125.89)  224.20                80
 04/15/2020   22:15:57   (   0.19,-127.91) (  -0.53,-131.12)  366.17                80
 04/16/2020   21:54:21   (   0.20,-127.94) (   0.52,-126.55)  158.72                80
 04/18/2020   10:18:32   (  -0.17,-127.99) (   0.68,-131.74)  427.74                80
 04/19/2020   09:56:56   (  -0.18,-128.01) (  -0.37,-127.16)   96.57                80
 04/20/2020   22:21:15   (   0.16,-128.05) (  -0.81,-132.39)  494.73                80
 04/21/2020   21:59:39   (   0.17,-128.08) (   0.24,-127.82)   29.76                80
 04/24/2020   10:04:54   (  -0.16,-128.15) (  -0.08,-128.43)   33.06                80
 04/25/2020   09:43:18   (  -0.18,-128.17) (  -1.13,-123.86)  490.47                80
 04/26/2020   22:07:37   (   0.15,-128.19) (  -0.05,-129.09)  102.45                80