Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/05/2019   22:12:55   (   0.00,-128.24) (  -0.64,-131.21)  338.26                80
 12/06/2019   21:56:39   (  -0.01,-128.22) (   0.32,-126.62)  180.97                80
 12/08/2019   10:15:31   (  -0.01,-128.22) (   0.81,-131.84)  412.82                80
 12/09/2019   09:59:16   (   0.00,-128.19) (  -0.21,-127.26)  106.02                80
 12/10/2019   22:18:15   (   0.02,-128.11) (  -0.94,-132.50)  499.48                80
 12/11/2019   22:01:59   (   0.00,-128.08) (   0.02,-127.91)   19.05                80
 12/14/2019   10:01:55   (  -0.01,-128.03) (   0.09,-128.54)   58.41                80
 12/15/2019   09:45:39   (   0.00,-127.99) (  -0.88,-123.96)  459.27                80
 12/16/2019   22:04:38   (   0.02,-127.90) (  -0.28,-129.19)  147.85                80
 12/17/2019   21:48:23   (   0.01,-127.86) (   0.74,-124.62)  369.54                80