Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/16/2019   22:04:39   (   0.02,-127.92) (  -0.25,-129.20)  144.70                80
 12/17/2019   21:48:23   (   0.01,-127.89) (   0.77,-124.62)  373.15                80
 12/19/2019   10:07:15   (  -0.03,-127.86) (   0.41,-129.82)  223.69                80
 12/20/2019   09:50:59   (  -0.02,-127.82) (  -0.62,-125.24)  293.95                80
 12/21/2019   22:09:57   (   0.04,-127.74) (  -0.60,-130.47)  311.89                80
 12/22/2019   21:53:42   (   0.03,-127.70) (   0.42,-125.89)  205.59                80
 12/24/2019   10:12:33   (  -0.04,-127.66) (   0.76,-131.09)  391.74                80
 12/25/2019   09:56:18   (  -0.03,-127.62) (  -0.27,-126.52)  125.34                80
 12/26/2019   22:15:17   (   0.04,-127.52) (  -0.89,-131.75)  481.43                80
 12/27/2019   21:59:01   (   0.03,-127.48) (   0.07,-127.16)   35.56                80