Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2019   10:07:15   (  -0.03,-127.95) (   0.40,-129.82)  213.42                80
 12/20/2019   09:50:59   (  -0.02,-127.95) (  -0.63,-125.25)  308.04                80
 12/21/2019   22:09:59   (   0.04,-127.90) (  -0.54,-130.48)  294.23                80
 12/22/2019   21:53:43   (   0.03,-127.89) (   0.49,-125.91)  226.87                80
 12/24/2019   10:12:34   (  -0.04,-127.93) (   0.69,-131.10)  362.76                80
 12/25/2019   09:56:19   (  -0.03,-127.92) (  -0.33,-126.53)  158.15                80
 12/26/2019   22:15:18   (   0.04,-127.86) (  -0.83,-131.76)  444.71                80
 12/27/2019   21:59:03   (   0.03,-127.85) (   0.19,-127.19)   75.80                80
 12/30/2019   10:01:39   (  -0.03,-127.87) (  -0.04,-127.81)    5.82                80